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<html>

<head>

<title>PHP Opcode Documentation</title>

</head>

<body>

<h2> Documentation and sample code for PHP opcodes </h2>

<p> This is a list of PHP's opcodes with sample PHP code showing the use of each one. The list is not quite complete.</p>

<table border=1 ><tr><td bgcolor=#CCCCFF> Number </td><td bgcolor=#CCCCFF> Name</td> <td bgcolor=#CCCCFF> Sample code? </td> </tr><tr><td>0</td><td><a href=#NOP>NOP</a></td><td>yes</td></tr><tr><td>1</td><td><a href=#ADD>ADD</a></td><td>yes</td></tr><tr><td>2</td><td><a href=#SUB>SUB</a></td><td>yes</td></tr><tr><td>3</td><td><a href=#MUL>MUL</a></td><td>yes</td></tr><tr><td>4</td><td><a href=#DIV>DIV</a></td><td>yes</td></tr><tr><td>5</td><td><a href=#MOD>MOD</a></td><td>yes</td></tr><tr><td>6</td><td><a href=#SL>SL</a></td><td>yes</td></tr><tr><td>7</td><td><a href=#SR>SR</a></td><td>yes</td></tr><tr><td>8</td><td><a href=#CONCAT>CONCAT</a></td><td>yes</td></tr><tr><td>9</td><td><a href=#BW_OR>BW_OR</a></td><td>yes</td></tr><tr><td>10</td><td><a href=#BW_AND>BW_AND</a></td><td>yes</td></tr><tr><td>11</td><td><a href=#BW_XOR>BW_XOR</a></td><td>yes</td></tr><tr><td>12</td><td><a href=#BW_NOT>BW_NOT</a></td><td>yes</td></tr><tr><td>13</td><td><a href=#BOOL_NOT>BOOL_NOT</a></td><td>yes</td></tr><tr><td>14</td><td><a href=#BOOL_XOR>BOOL_XOR</a></td><td>yes</td></tr><tr><td>15</td><td><a href=#IS_IDENTICAL>IS_IDENTICAL</a></td><td>yes</td></tr><tr><td>16</td><td><a href=#IS_NOT_IDENTICAL>IS_NOT_IDENTICAL</a></td><td>yes</td></tr><tr><td>17</td><td><a href=#IS_EQUAL>IS_EQUAL</a></td><td>yes</td></tr><tr><td>18</td><td><a href=#IS_NOT_EQUAL>IS_NOT_EQUAL</a></td><td>yes</td></tr><tr><td>19</td><td><a href=#IS_SMALLER>IS_SMALLER</a></td><td>yes</td></tr><tr><td>20</td><td><a href=#IS_SMALLER_OR_EQUAL>IS_SMALLER_OR_EQUAL</a></td><td>yes</td></tr><tr><td>21</td><td><a href=#CAST>CAST</a></td><td>yes</td></tr><tr><td>22</td><td><a href=#QM_ASSIGN>QM_ASSIGN</a></td><td>yes</td></tr><tr><td>23</td><td><a href=#ASSIGN_ADD>ASSIGN_ADD</a></td><td>yes</td></tr><tr><td>24</td><td><a href=#ASSIGN_SUB>ASSIGN_SUB</a></td><td>yes</td></tr><tr><td>25</td><td><a href=#ASSIGN_MUL>ASSIGN_MUL</a></td><td>yes</td></tr><tr><td>26</td><td><a href=#ASSIGN_DIV>ASSIGN_DIV</a></td><td>yes</td></tr><tr><td>27</td><td><a href=#ASSIGN_MOD>ASSIGN_MOD</a></td><td>yes</td></tr><tr><td>28</td><td><a href=#ASSIGN_SL>ASSIGN_SL</a></td><td>yes</td></tr><tr><td>29</td><td><a href=#ASSIGN_SR>ASSIGN_SR</a></td><td>yes</td></tr><tr><td>30</td><td><a href=#ASSIGN_CONCAT>ASSIGN_CONCAT</a></td><td>yes</td></tr><tr><td>31</td><td><a href=#ASSIGN_BW_OR>ASSIGN_BW_OR</a></td><td>yes</td></tr><tr><td>32</td><td><a href=#ASSIGN_BW_AND>ASSIGN_BW_AND</a></td><td>yes</td></tr><tr><td>33</td><td><a href=#ASSIGN_BW_XOR>ASSIGN_BW_XOR</a></td><td>yes</td></tr><tr><td>34</td><td><a href=#PRE_INC>PRE_INC</a></td><td>yes</td></tr><tr><td>35</td><td><a href=#PRE_DEC>PRE_DEC</a></td><td>yes</td></tr><tr><td>36</td><td><a href=#POST_INC>POST_INC</a></td><td>yes</td></tr><tr><td>37</td><td><a href=#POST_DEC>POST_DEC</a></td><td>yes</td></tr><tr><td>38</td><td><a href=#ASSIGN>ASSIGN</a></td><td>yes</td></tr><tr><td>39</td><td><a href=#ASSIGN_REF>ASSIGN_REF</a></td><td>yes</td></tr><tr><td>40</td><td><a href=#ECHO>ECHO</a></td><td>yes</td></tr><tr><td>41</td><td><a href=#PRINT>PRINT</a></td><td>yes</td></tr><tr><td>42</td><td><a href=#not documented>not documented</a></td><td>no</td></tr><tr><td>43</td><td><a href=#JMPZ>JMPZ</a></td><td>yes</td></tr><tr><td>44</td><td><a href=#JMPNZ>JMPNZ</a></td><td>yes</td></tr><tr><td>45</td><td><a href=#JMPZNZ>JMPZNZ</a></td><td>yes</td></tr><tr><td>46</td><td><a href=#JMPZ_EX>JMPZ_EX</a></td><td>yes</td></tr><tr><td>47</td><td><a href=#JMPNZ_EX>JMPNZ_EX</a></td><td>yes</td></tr><tr><td>48</td><td><a href=#CASE>CASE</a></td><td>yes</td></tr><tr><td>49</td><td><a href=#SWITCH_FREE>SWITCH_FREE</a></td><td>yes</td></tr><tr><td>50</td><td><a href=#BRK>BRK</a></td><td>yes</td></tr><tr><td>51</td><td><a href=#not documented>not documented</a></td><td>no</td></tr><tr><td>52</td><td><a href=#BOOL>BOOL</a></td><td>yes</td></tr><tr><td>53</td><td><a href=#INIT_STRING>INIT_STRING</a></td><td>yes</td></tr><tr><td>54</td><td><a href=#ADD_CHAR>ADD_CHAR</a></td><td>yes</td></tr><tr><td>55</td><td><a href=#ADD_STRING>ADD_STRING</a></td><td>yes</td></tr><tr><td>56</td><td><a href=#ADD_VAR>ADD_VAR</a></td><td>yes</td></tr><tr><td>57</td><td><a href=#BEGIN_SILENCE>BEGIN_SILENCE</a></td><td>yes</td></tr><tr><td>58</td><td><a href=#END_SILENCE>END_SILENCE</a></td><td>yes</td></tr><tr><td>59</td><td><a href=#INIT_FCALL_BY_NAME>INIT_FCALL_BY_NAME</a></td><td>yes</td></tr><tr><td>60</td><td><a href=#DO_FCALL>DO_FCALL</a></td><td>yes</td></tr><tr><td>61</td><td><a href=#DO_FCALL_BY_NAME>DO_FCALL_BY_NAME</a></td><td>yes</td></tr><tr><td>62</td><td><a href=#RETURN>RETURN</a></td><td>yes</td></tr><tr><td>63</td><td><a href=#RECV>RECV</a></td><td>yes</td></tr><tr><td>64</td><td><a href=#RECV_INIT>RECV_INIT</a></td><td>yes</td></tr><tr><td>65</td><td><a href=#SEND_VAL>SEND_VAL</a></td><td>yes</td></tr><tr><td>66</td><td><a href=#SEND_VAR>SEND_VAR</a></td><td>yes</td></tr><tr><td>67</td><td><a href=#SEND_REF>SEND_REF</a></td><td>yes</td></tr><tr><td>68</td><td><a href=#NEW>NEW</a></td><td>yes</td></tr><tr><td>69</td><td><a href=#not documented>not documented</a></td><td>no</td></tr><tr><td>70</td><td><a href=#FREE>FREE</a></td><td>yes</td></tr><tr><td>71</td><td><a href=#INIT_ARRAY>INIT_ARRAY</a></td><td>yes</td></tr><tr><td>72</td><td><a href=#ADD_ARRAY_ELEMENT>ADD_ARRAY_ELEMENT</a></td><td>yes</td></tr><tr><td>73</td><td><a href=#INCLUDE_OR_EVAL>INCLUDE_OR_EVAL</a></td><td>yes</td></tr><tr><td>74</td><td><a href=#UNSET_VAR>UNSET_VAR</a></td><td>yes</td></tr><tr><td>75</td><td><a href=#UNSET_DIM>UNSET_DIM</a></td><td>yes</td></tr><tr><td>76</td><td><a href=#UNSET_OBJ>UNSET_OBJ</a></td><td>yes</td></tr><tr><td>77</td><td><a href=#FE_RESET>FE_RESET</a></td><td>yes</td></tr><tr><td>78</td><td><a href=#FE_FETCH>FE_FETCH</a></td><td>yes</td></tr><tr><td>79</td><td><a href=#EXIT>EXIT</a></td><td>yes</td></tr><tr><td>80</td><td><a href=#FETCH_R>FETCH_R</a></td><td>yes</td></tr><tr><td>81</td><td><a href=#FETCH_DIM_R>FETCH_DIM_R</a></td><td>yes</td></tr><tr><td>82</td><td><a href=#FETCH_OBJ_R>FETCH_OBJ_R</a></td><td>yes</td></tr><tr><td>83</td><td><a href=#FETCH_W>FETCH_W</a></td><td>yes</td></tr><tr><td>84</td><td><a href=#FETCH_DIM_W>FETCH_DIM_W</a></td><td>yes</td></tr><tr><td>85</td><td><a href=#FETCH_OBJ_W>FETCH_OBJ_W</a></td><td>yes</td></tr><tr><td>86</td><td><a href=#FETCH_RW>FETCH_RW</a></td><td>yes</td></tr><tr><td>87</td><td><a href=#FETCH_DIM_RW>FETCH_DIM_RW</a></td><td>yes</td></tr><tr><td>88</td><td><a href=#FETCH_OBJ_RW>FETCH_OBJ_RW</a></td><td>yes</td></tr><tr><td>89</td><td><a href=#FETCH_IS>FETCH_IS</a></td><td>yes</td></tr><tr><td>90</td><td><a href=#FETCH_DIM_IS>FETCH_DIM_IS</a></td><td>no</td></tr><tr><td>91</td><td><a href=#FETCH_OBJ_IS>FETCH_OBJ_IS</a></td><td>no</td></tr><tr><td>92</td><td><a href=#FETCH_FUNC_ARG>FETCH_FUNC_ARG</a></td><td>yes</td></tr><tr><td>93</td><td><a href=#FETCH_DIM_FUNC_ARG>FETCH_DIM_FUNC_ARG</a></td><td>yes</td></tr><tr><td>94</td><td><a href=#FETCH_OBJ_FUNC_ARG>FETCH_OBJ_FUNC_ARG</a></td><td>yes</td></tr><tr><td>95</td><td><a href=#FETCH_UNSET>FETCH_UNSET</a></td><td>no</td></tr><tr><td>96</td><td><a href=#FETCH_DIM_UNSET>FETCH_DIM_UNSET</a></td><td>no</td></tr><tr><td>97</td><td><a href=#FETCH_OBJ_UNSET>FETCH_OBJ_UNSET</a></td><td>no</td></tr><tr><td>98</td><td><a href=#FETCH_DIM_TMP_VAR>FETCH_DIM_TMP_VAR</a></td><td>yes</td></tr><tr><td>99</td><td><a href=#FETCH_CONSTANT>FETCH_CONSTANT</a></td><td>yes</td></tr><tr><td>100</td><td><a href=#not documented>not documented</a></td><td>no</td></tr><tr><td>101</td><td><a href=#EXT_STMT>EXT_STMT</a></td><td>no</td></tr><tr><td>102</td><td><a href=#EXT_FCALL_BEGIN>EXT_FCALL_BEGIN</a></td><td>no</td></tr><tr><td>103</td><td><a href=#EXT_FCALL_END>EXT_FCALL_END</a></td><td>no</td></tr><tr><td>104</td><td><a href=#EXT_NOP>EXT_NOP</a></td><td>no</td></tr><tr><td>105</td><td><a href=#TICKS>TICKS</a></td><td>yes</td></tr><tr><td>106</td><td><a href=#SEND_VAR_NO_REF>SEND_VAR_NO_REF</a></td><td>no</td></tr><tr><td>107</td><td><a href=#CATCH>CATCH</a></td><td>yes</td></tr><tr><td>108</td><td><a href=#THROW>THROW</a></td><td>yes</td></tr><tr><td>109</td><td><a href=#FETCH_CLASS>FETCH_CLASS</a></td><td>yes</td></tr><tr><td>110</td><td><a href=#CLONE>CLONE</a></td><td>yes</td></tr><tr><td>111</td><td><a href=#not documented>not documented</a></td><td>no</td></tr><tr><td>112</td><td><a href=#INIT_METHOD_CALL>INIT_METHOD_CALL</a></td><td>yes</td></tr><tr><td>113</td><td><a href=#INIT_STATIC_METHOD_CALL>INIT_STATIC_METHOD_CALL</a></td><td>yes</td></tr><tr><td>114</td><td><a href=#ISSET_ISEMPTY_VAR>ISSET_ISEMPTY_VAR</a></td><td>yes</td></tr><tr><td>115</td><td><a href=#ISSET_ISEMPTY_DIM_OBJ>ISSET_ISEMPTY_DIM_OBJ</a></td><td>yes</td></tr><tr><td>116</td><td><a href=#not documented>not documented</a></td><td>no</td></tr><tr><td>117</td><td><a href=#not documented>not documented</a></td><td>no</td></tr><tr><td>118</td><td><a href=#not documented>not documented</a></td><td>no</td></tr><tr><td>119</td><td><a href=#not documented>not documented</a></td><td>no</td></tr><tr><td>120</td><td><a href=#not documented>not documented</a></td><td>no</td></tr><tr><td>121</td><td><a href=#not documented>not documented</a></td><td>no</td></tr><tr><td>122</td><td><a href=#not documented>not documented</a></td><td>no</td></tr><tr><td>123</td><td><a href=#not documented>not documented</a></td><td>no</td></tr><tr><td>124</td><td><a href=#not documented>not documented</a></td><td>no</td></tr><tr><td>125</td><td><a href=#not documented>not documented</a></td><td>no</td></tr><tr><td>126</td><td><a href=#not documented>not documented</a></td><td>no</td></tr><tr><td>127</td><td><a href=#not documented>not documented</a></td><td>no</td></tr><tr><td>128</td><td><a href=#not documented>not documented</a></td><td>no</td></tr><tr><td>129</td><td><a href=#not documented>not documented</a></td><td>no</td></tr><tr><td>130</td><td><a href=#not documented>not documented</a></td><td>no</td></tr><tr><td>131</td><td><a href=#not documented>not documented</a></td><td>no</td></tr><tr><td>132</td><td><a href=#PRE_INC_OBJ>PRE_INC_OBJ</a></td><td>yes</td></tr><tr><td>133</td><td><a href=#PRE_DEC_OBJ>PRE_DEC_OBJ</a></td><td>yes</td></tr><tr><td>134</td><td><a href=#POST_INC_OBJ>POST_INC_OBJ</a></td><td>yes</td></tr><tr><td>135</td><td><a href=#POST_DEC_OBJ>POST_DEC_OBJ</a></td><td>yes</td></tr><tr><td>136</td><td><a href=#ASSIGN_OBJ>ASSIGN_OBJ</a></td><td>yes</td></tr><tr><td>137</td><td><a href=#not documented>not documented</a></td><td>no</td></tr><tr><td>138</td><td><a href=#INSTANCEOF>INSTANCEOF</a></td><td>yes</td></tr><tr><td>139</td><td><a href=#DECLARE_CLASS>DECLARE_CLASS</a></td><td>yes</td></tr><tr><td>140</td><td><a href=#DECLARE_INHERITED_CLASS>DECLARE_INHERITED_CLASS</a></td><td>yes</td></tr><tr><td>141</td><td><a href=#DECLARE_FUNCTION>DECLARE_FUNCTION</a></td><td>yes</td></tr><tr><td>142</td><td><a href=#RAISE_ABSTRACT_ERROR>RAISE_ABSTRACT_ERROR</a></td><td>yes</td></tr><tr><td>143</td><td><a href=#not documented>not documented</a></td><td>no</td></tr><tr><td>144</td><td><a href=#ADD_INTERFACE>ADD_INTERFACE</a></td><td>no</td></tr><tr><td>145</td><td><a href=#not documented>not documented</a></td><td>no</td></tr><tr><td>146</td><td><a href=#VERIFY_ABSTRACT_CLASS>VERIFY_ABSTRACT_CLASS</a></td><td>no</td></tr><tr><td>147</td><td><a href=#ASSIGN_DIM>ASSIGN_DIM</a></td><td>yes</td></tr><tr><td>148</td><td><a href=#ISSET_ISEMPTY_PROP_OBJ>ISSET_ISEMPTY_PROP_OBJ</a></td><td>yes</td></tr><tr><td>149</td><td><a href=#HANDLE_EXCEPTION>HANDLE_EXCEPTION</a></td><td>yes</td></tr><tr><td>150</td><td><a href=#USER_OPCODE>USER_OPCODE</a></td><td>no</td></tr></table><h2>OPCODE :<a name=ADD>ADD</a></h2><h3> PHP source code </h3><textarea style="background-color: #FFFF66" rows=7 cols="130"><?php

* Adds "value1" to "value2" and stores the result into "result".

* opcode number: 1

echo 1 + 2;

* Add elem-value as an element to array-value

* opcode number: 72

$a = array(1,2,3);

print_r($a);

?></textarea></br><h3> PHP opcodes </h3>Function name: <b>(null)</b></br>Compiled variables: !0=$a </br><table width="80%" border=1 ><tr><td bgcolor=#9966FF> line</td><td bgcolor=#9966FF> #</td><td bgcolor=#9966FF> op</td><td bgcolor=#9966FF> fetch</td><td bgcolor=#9966FF> ext</td><td bgcolor=#9966FF> return</td><td bgcolor=#9966FF> operands</td></tr><tr><td> 6</td><td> 0</td><td> INIT_ARRAY</td><td >   </td><td >   </td><td> ~0</td><td> 1</td></tr><tr><td >   </td><td> 1</td><td> ADD_ARRAY_ELEMENT</td><td >   </td><td >   </td><td> ~0</td><td> 2</td></tr><tr><td >   </td><td> 2</td><td> ADD_ARRAY_ELEMENT</td><td >   </td><td >   </td><td> ~0</td><td> 3</td></tr><tr><td >   </td><td> 3</td><td> ASSIGN</td><td >   </td><td >   </td><td >   </td><td> !0,~0</td></tr><tr><td> 7</td><td> 4</td><td> SEND_VAR</td><td >   </td><td >   </td><td >   </td><td> !0</td></tr><tr><td >   </td><td> 5</td><td> DO_FCALL</td><td >   </td><td> 1</td><td >   </td><td> 'print_r'</td></tr><tr><td> 8</td><td> 6</td><td> RETURN</td><td >   </td><td >   </td><td >   </td><td> 1</td></tr></table></br><h2>OPCODE :<a name=ADD_CHAR>ADD_CHAR</a></h2><h3> PHP source code </h3><textarea style="background-color: #FFFF66" rows=7 cols="130"><?php

* add character value2 to string value1 and store in result

* opcode number: 54

echo "hello\ world";

* opcode number: 144

* No sample PHP yet */

?></textarea></br><h3> PHP opcodes </h3><h2>OPCODE :<a name=ADD_STRING>ADD_STRING</a></h2><h3> PHP source code </h3><textarea style="background-color: #FFFF66" rows=7 cols="130"><?php

* add string value2 to string value2 and store in result

* opcode number: 55

echo "hello$a world";

* add contents of variable in value2 to string value1 and store in result

* opcode number: 56

echo "hello$a world";

* assigns value1 to result

* opcode number: 38

$a=1;

$a=&# 10BC8 039;a';

$a=new A();

?></textarea></br><h3> PHP opcodes </h3>Function name: <b>(null)</b></br>Compiled variables: !0=$a </br><table width="80%" border=1 ><tr><td bgcolor=#9966FF> line</td><td bgcolor=#9966FF> #</td><td bgcolor=#9966FF> op</td><td bgcolor=#9966FF> fetch</td><td bgcolor=#9966FF> ext</td><td bgcolor=#9966FF> return</td><td bgcolor=#9966FF> operands</td></tr><tr><td> 6</td><td> 0</td><td> ASSIGN</td><td >   </td><td >   </td><td >   </td><td> !0,1</td></tr><tr><td> 7</td><td> 1</td><td> ASSIGN</td><td >   </td><td >   </td><td >   </td><td> !0,'a'</td></tr><tr><td> 8</td><td> 2</td><td> ZEND_FETCH_CLASS</td><td >   </td><td >   </td><td> :2</td><td> 'A'</td></tr><tr><td >   </td><td> 3</td><td> NEW</td><td >   </td><td >   </td><td> $3</td><td> :2</td></tr><tr><td >   </td><td> 4</td><td> DO_FCALL_BY_NAME</td><td >   </td><td> 0</td><td >   </td><td >   </td></tr><tr><td >   </td><td> 5</td><td> ASSIGN</td><td >   </td><td >   </td><td >   </td><td> !0,$3</td></tr><tr><td> 9</td><td> 6</td><td> RETURN</td><td >   </td><td >   </td><td >   </td><td> 1</td></tr></table></br><h2>OPCODE :<a name=ASSIGN_ADD>ASSIGN_ADD</a></h2><h3> PHP source code </h3><textarea style="background-color: #FFFF66" rows=7 cols="130"><?php

* Add value1 to value2 and store in variable indicated by value1

* opcode number: 23

$a+=3;

* Performs binary AND on result and value1 and stores in variable indicated by result.

* opcode number: 32

$a &= 64;

* Performs binary OR on result and value1 and stores in variable indicated by result.

* opcode number: 31

$a |= 64;

* Performs binary XOR on result and value1and stores in variable indicated by result.

* opcode number: 33

$a ^= 64;

* Concats string values result and value1 and store in variable indicated by result

* opcode number: 30

$a .= 'z';

* opcode number: 147

$b = 1;

$a[1][2] = $b;

?></textarea></br><h3> PHP opcodes </h3>Function name: <b>(null)</b></br>Compiled variables: !0=$b, !1=$a </br><table width="80%" border=1 ><tr><td bgcolor=#9966FF> line</td><td bgcolor=#9966FF> #</td><td bgcolor=#9966FF> op</td><td bgcolor=#9966FF> fetch</td><td bgcolor=#9966FF> ext</td><td bgcolor=#9966FF> return</td><td bgcolor=#9966FF> operands</td></tr><tr><td> 6</td><td> 0</td><td> ASSIGN</td><td >   </td><td >   </td><td >   </td><td> !0,1</td></tr><tr><td> 7</td><td> 1</td><td> FETCH_DIM_W</td><td >   </td><td >   </td><td> $1</td><td> !1,1</td></tr><tr><td >   </td><td> 2</td><td> ZEND_ASSIGN_DIM</td><td >   </td><td >   </td><td >   </td><td> $1,2</td></tr><tr><td >   </td><td> 3</td><td> ZEND_OP_DATA</td><td >   </td><td >   </td><td >   </td><td> !0,$3</td></tr><tr><td> 8</td><td> 4</td><td> RETURN</td><td >   </td><td >   </td><td >   </td><td> 1</td></tr></table></br><h2>OPCODE :<a name=ASSIGN_DIV>ASSIGN_DIV</a></h2><h3> PHP source code </h3><textarea style="background-color: #FFFF66" rows=7 cols="130"><?php

* Divide result by value1and store in variable indicated by result.

* opcode number: 26

$a/=3;

* Perform result mod value1 and store in variable indicated by result

* opcode number: 27

$a %= 3;

* Multiply result by value1 and store in variable indicated by result

* opcode number: 25

$a*=3;

* opcode number: 136

$obj->a = $otherobj;

?></textarea></br><h3> PHP opcodes </h3>Function name: <b>(null)</b></br>Compiled variables: !0=$obj, !1=$otherobj </br><table width="80%" border=1 ><tr><td bgcolor=#9966FF> line</td><td bgcolor=#9966FF> #</td><td bgcolor=#9966FF> op</td><td bgcolor=#9966FF> fetch</td><td bgcolor=#9966FF> ext</td><td bgcolor=#9966FF> return</td><td bgcolor=#9966FF> operands</td></tr><tr><td> 6</td><td> 0</td><td> ZEND_ASSIGN_OBJ</td><td >   </td><td >   </td><td >   </td><td> !0,'a'</td></tr><tr><td >   </td><td> 1</td><td> ZEND_OP_DATA</td><td >   </td><td >   </td><td >   </td><td> !1</td></tr><tr><td> 7</td><td> 2</td><td> RETURN</td><td >   </td><td >   </td><td >   </td><td> 1</td></tr></table></br><h2>OPCODE :<a name=ASSIGN_REF>ASSIGN_REF</a></h2><h3> PHP source code </h3><textarea style="background-color: #FFFF66" rows=7 cols="130"><?php

* indicates that variable indicated by value1 is to be treated in the global scope for the remainder of the current scope.

* opcode number: 39

global $a;

* Shift result by value1 bits to left and store in variable indicated by result

* opcode number: 28

$a <<= 3;

* Shift result by value1 bits to right and store in variable indicated by result

* opcode number: 29

$a >>= 3;

* Subtract value1 from value2 and store in variable indicated by value1

* opcode number: 24

$a-=3;

* prepare to perform function call without displaying error messages

* opcode number: 57

/* Intentional file error */

$my_file = @file ('non_existent_file') or

die ("error:'$php_errormsg'");

?></textarea></br><h3> PHP opcodes </h3>Function name: <b>(null)</b></br>Compiled variables: !0=$my_file, !1=$php_errormsg </br><table width="80%" border=1 ><tr><td bgcolor=#9966FF> line</td><td bgcolor=#9966FF> #</td><td bgcolor=#9966FF> op</td><td bgcolor=#9966FF> fetch</td><td bgcolor=#9966FF> ext</td><td bgcolor=#9966FF> return</td><td bgcolor=#9966FF> operands</td></tr><tr><td> 7</td><td> 0</td><td> BEGIN_SILENCE</td><td >   </td><td >   </td><td> ~0</td><td >   </td></tr><tr><td >   </td><td> 1</td><td> SEND_VAL</td><td >   </td><td >   </td><td >   </td><td> 'non_existent_file'</td></tr><tr><td >   </td><td> 2</td><td> DO_FCALL</td><td >   </td><td> 1</td><td >   </td><td> 'file'</td></tr><tr><td >   </td><td> 3</td><td> END_SILENCE</td><td >   </td><td >   </td><td >   </td><td> ~0</td></tr><tr><td >   </td><td> 4</td><td> ASSIGN</td><td >   </td><td >   </td><td> $2</td><td> !0,$1</td></tr><tr><td >   </td><td> 5</td><td> JMPNZ_EX</td><td >   </td><td >   </td><td> ~3</td><td> $2,->11</td></tr><tr><td> 8</td><td> 6</td><td> ADD_STRING</td><td >   </td><td >   </td><td> ~4</td><td> 'error%3A%27'</td></tr><tr><td >   </td><td> 7</td><td> ADD_VAR</td><td >   </td><td >   </td><td> ~4</td><td> ~4,!1</td></tr><tr><td >   </td><td> 8</td><td> ADD_CHAR</td><td >   </td><td >   </td><td> ~4</td><td> ~4,39</td></tr><tr><td >   </td><td> 9</td><td> EXIT</td><td >   </td><td >   </td><td >   </td><td> ~4</td></tr><tr><td >   </td><td> 10</td><td> BOOL</td><td >   </td><td >   </td><td> ~3</td><td> true</td></tr><tr><td >   </td><td> 11</td><td> FREE</td><td >   </td><td >   </td><td >   </td><td> ~3</td></tr><tr><td> 9</td><td> 12</td><td> RETURN</td><td >   </td><td >   </td><td >   </td><td> 1</td></tr></table></br><h2>OPCODE :<a name=BOOL>BOOL</a></h2><h3> PHP source code </h3><textarea style="background-color: #FFFF66" rows=9 cols="130"><?php

* convert value1 to boolean and store in result??????????

* opcode number: 52

if (1 || 2 || 1) echo "foo";

//$a = true;

//if($a) echo "foo";

* Boolean (logical) not of "value"

* opcode number: 13

echo !1;

* Boolean (logical) xor of value1

* opcode number: 14

echo 1 xor 2;

* ??? End of a case block exists the current switch block. Followed by JMP?

* opcode number: 50

$x = 0;

while(1) {

if($x == 0) break;

}

* Bit-wise and of value1 and value2

* opcode number: 10

echo 1&2;

* Bit-wise not of "value"

* opcode number: 12

echo ~15;

* Bit-wise or of value1 and value2

* opcode number: 9

echo 1|2;

* Bit-wise xor of value1 and value2

* opcode number: 11

echo 1^2;

* Set result to true if value1 equals value2. The value2 must be a constant value?

* opcode number: 48

$i=0;

switch ($i) {

case 0:

echo "i=0";

break;

case 1:

echo "i=1";

break;

case 2:

echo "i=2";

break;

}

?></textarea></br><h3> PHP opcodes </h3>Function name: <b>(null)</b></br>Compiled variables: !0=$i </br><table width="80%" border=1 ><tr><td bgcolor=#9966FF> line</td><td bgcolor=#9966FF> #</td><td bgcolor=#9966FF> op</td><td bgcolor=#9966FF> fetch</td><td bgcolor=#9966FF> ext</td><td bgcolor=#9966FF> return</td><td bgcolor=#9966FF> operands</td></tr><tr><td> 6</td><td> 0</td><td> ASSIGN</td><td >   </td><td >   </td><td >   </td><td> !0,0</td></tr><tr><td> 8</td><td> 1</td><td> CASE</td><td >   </td><td >   </td><td> ~1</td><td> !0,0</td></tr><tr><td >   </td><td> 2</td><td> JMPZ</td><td >   </td><td >   </td><td >   </td><td> ~1,->6</td></tr><tr><td> 9</td><td> 3</td><td> ECHO</td><td >   </td><td >   </td><td >   </td><td> 'i%3D0'</td></tr><tr><td> 10</td><td> 4</td><td> BRK</td><td >   </td><td >   </td><td >   </td><td> 1</td></tr><tr><td> 11</td><td> 5</td><td> JMP</td><td >   </td><td >   </td><td >   </td><td> ->8</td></tr><tr><td >   </td><td> 6</td><td> CASE</td><td >   </td><td >   </td><td> ~1</td><td> !0,1</td></tr><tr><td >   </td><td> 7</td><td> JMPZ</td><td >   </td><td >   </td><td >   </td><td> ~1,->11</td></tr><tr><td> 12</td><td> 8</td><td> ECHO</td><td >   </td><td >   </td><td >   </td><td> 'i%3D1'</td></tr><tr><td> 13</td><td> 9</td><td> BRK</td><td >   </td><td >   </td><td >   </td><td> 1</td></tr><tr><td> 14</td><td> 10</td><td> JMP</td><td >   </td><td >   </td><td >   </td><td> ->13</td></tr><tr><td >   </td><td> 11</td><td> CASE</td><td >   </td><td >   </td><td> ~1</td><td> !0,2</td></tr><tr><td >   </td><td> 12</td><td> JMPZ</td><td >   </td><td >   </td><td >   </td><td> ~1,->16</td></tr><tr><td> 15</td><td> 13</td><td> ECHO</td><td >   </td><td >   </td><td >   </td><td> 'i%3D2'</td></tr><tr><td> 16</td><td> 14</td><td> BRK</td><td >   </td><td >   </td><td >   </td><td> 1</td></tr><tr><td> 17</td><td> 15</td><td> JMP</td><td >   </td><td >   </td><td >   </td><td> ->16</td></tr><tr><td> 18</td><td> 16</td><td> RETURN</td><td >   </td><td >   </td><td >   </td><td> 1</td></tr></table></br><h2>OPCODE :<a name=CAST>CAST</a></h2><h3> PHP source code </h3><textarea style="background-color: #FFFF66" rows=7 cols="130"><?php

* casts value1 as type value2 (?? Not certain about arguments ??)

* opcode number: 21

echo (int)1;

* opcode number: 107

try {

$error = 'Always throw this error';

throw new Exception($error);

// Code following an exception is not executed.

echo 'Never executed';

} catch (Exception $e) {

echo 'Caught exception: ', $e->getMessage(), "\n";

}

// Continue execution

echo 'Hello World';

?></textarea></br><h3> PHP opcodes </h3>Function name: <b>(null)</b></br>Compiled variables: !0=$error, !1=$e </br><table width="80%" border=1 ><tr><td bgcolor=#9966FF> line</td><td bgcolor=#9966FF> #</td><td bgcolor=#9966FF> op</td><td bgcolor=#9966FF> fetch</td><td bgcolor=#9966FF> ext</td><td bgcolor=#9966FF> return</td><td bgcolor=#9966FF> operands</td></tr><tr><td> 7</td><td> 0</td><td> ASSIGN</td><td >   </td><td >   </td><td >   </td><td> !0,'Always+throw+this+error'</td></tr><tr><td> 8</td><td> 1</td><td> ZEND_FETCH_CLASS</td><td >   </td><td >   </td><td> :1</td><td> 'Exception'</td></tr><tr><td >   </td><td> 2</td><td> NEW</td><td >   </td><td >   </td><td> $2</td><td> :1</td></tr><tr><td >   </td><td> 3</td><td> SEND_VAR</td><td >   </td><td >   </td><td >   </td><td> !0</td></tr><tr><td >   </td><td> 4</td><td> DO_FCALL_BY_NAME</td><td >   </td><td> 1</td><td >   </td><td >   </td></tr><tr><td >   </td><td> 5</td><td> ZEND_THROW</td><td >   </td><td> 0</td><td >   </td><td> $2</td></tr><tr><td> 11</td><td> 6</td><td> ECHO</td><td >   </td><td >   </td><td >   </td><td> 'Never+executed'</td></tr><tr><td> 13</td><td> 7</td><td> JMP</td><td >   </td><td >   </td><td >   </td><td> ->15</td></tr><tr><td >   </td><td> 8</td><td> ZEND_FETCH_CLASS</td><td >   </td><td >   </td><td> :4</td><td> 'Exception'</td></tr><tr><td >   </td><td> 9</td><td> ZEND_CATCH</td><td >   </td><td> 15</td><td >   </td><td> $4,!1</td></tr><tr><td> 14</td><td> 10</td><td> ECHO</td><td >   </td><td >   </td><td >   </td><td> 'Caught+exception%3A+'</td></tr><tr><td >   </td><td> 11</td><td> ZEND_INIT_METHOD_CALL</td><td >   </td><td >   </td><td >   </td><td> !1,'getMessage'</td></tr><tr><td >   </td><td> 12</td><td> DO_FCALL_BY_NAME</td><td >   </td><td> 0</td><td >   </td><td >   </td></tr><tr><td >   </td><td> 13</td><td> ECHO</td><td >   </td><td >   </td><td >   </td><td> $6</td></tr><tr><td >   </td><td> 14</td><td> ECHO</td><td >   </td><td >   </td><td >   </td><td> '%0A'</td></tr><tr><td> 18</td><td> 15</td><td> ECHO</td><td >   </td><td >   </td><td >   </td><td> 'Hello+World'</td></tr><tr><td> 19</td><td> 16</td><td> RETURN</td><td >   </td><td >   </td><td >   </td><td> 1</td></tr></table></br><h2>OPCODE :<a name=CLONE>CLONE</a></h2><h3> PHP source code </h3><textarea style="background-color: #FFFF66" rows=8 cols="130"><?php

* opcode number: 110

$obj = new A();

$copy = clone $obj;

?></textarea></br><h3> PHP opcodes </h3>Function name: <b>(null)</b></br>Compiled variables: !0=$obj, !1=$copy </br><table width="80%" border=1 ><tr><td bgcolor=#9966FF> line</td><td bgcolor=#9966FF> #</td><td bgcolor=#9966FF> op</td><td bgcolor=#9966FF> fetch</td><td bgcolor=#9966FF> ext</td><td bgcolor=#9966FF> return</td><td bgcolor=#9966FF> operands</td></tr><tr><td> 6</td><td> 0</td><td> ZEND_FETCH_CLASS</td><td >   </td><td >   </td><td> :0</td><td> 'A'</td></tr><tr><td >   </td><td> 1</td><td> NEW</td><td >   </td><td >   </td><td> $1</td><td> :0</td></tr><tr><td >   </td><td> 2</td><td> DO_FCALL_BY_NAME</td><td >   </td><td> 0</td><td >   </td><td >   </td></tr><tr><td >   </td><td> 3</td><td> ASSIGN</td><td >   </td><td >   </td><td >   </td><td> !0,$1</td></tr><tr><td> 7</td><td> 4</td><td> ZEND_CLONE</td><td >   </td><td >   </td><td> $4</td><td> !0</td></tr><tr><td >   </td><td> 5</td><td> ASSIGN</td><td >   </td><td >   </td><td >   </td><td> !1,$4</td></tr><tr><td> 8</td><td> 6</td><td> RETURN</td><td >   </td><td >   </td><td >   </td><td> 1</td></tr></table></br><h2>OPCODE :<a name=CONCAT>CONCAT</a></h2><h3> PHP source code </h3><textarea style="background-color: #FFFF66" rows=7 cols="130"><?php

* Concats string values string1 and string2

* opcode number: 8

echo "hello" . "world";

* Declare a class with the name of class-name as the implementation specified by ID.

* opcode number: 139

class A {

function methodA(){

echo "hello world";

}

* opcode number: 141

class A{

function funcA(){

}

* opcode number: 140

if($b){

class Foo {

public static $my_static = 'foo';

public function staticValue() {

return self::$my_static;

}

class Bar extends Foo {

public function fooStatic() {

echo parent::$my_static;

}

?></textarea></br><h3> PHP opcodes </h3>Function name: <b>(null)</b></br>Compiled variables: !0=$b </br><table width="80%" border=1 ><tr><td bgcolor=#9966FF> line</td><td bgcolor=#9966FF> #</td><td bgcolor=#9966FF> op</td><td bgcolor=#9966FF> fetch</td><td bgcolor=#9966FF> ext</td><td bgcolor=#9966FF> return</td><td bgcolor=#9966FF> operands</td></tr><tr><td> 6</td><td> 0</td><td> JMPZ</td><td >   </td><td >   </td><td >   </td><td> !0,->5</td></tr><tr><td> 7</td><td> 1</td><td> ZEND_DECLARE_CLASS</td><td >   </td><td >   </td><td> $0</td><td> '%00foo%2Fmnt%2Fworkspace%2Fws_phpscripts%2FPHPopcodes%2Fphpsamples%2FDECLARE_INHERITED_CLASS.php0xb7be503b','foo'</td></tr><tr><td> 14</td><td> 2</td><td> ZEND_FETCH_CLASS</td><td >   </td><td >   </td><td> :1</td><td> 'Foo'</td></tr><tr><td >   </td><td> 3</td><td> ZEND_DECLARE_INHERITED_CLASS</td><td >   </td><td >   </td><td> $2</td><td> '%00bar%2Fmnt%2Fworkspace%2Fws_phpscripts%2FPHPopcodes%2Fphpsamples%2FDECLARE_INHERITED_CLASS.php0xb7be50bc','bar'</td></tr><tr><td> 19</td><td> 4</td><td> JMP</td><td >   </td><td >   </td><td >   </td><td> ->5</td></tr><tr><td> 20</td><td> 5</td><td> RETURN</td><td >   </td><td >   </td><td >   </td><td> 1</td></tr></table></br>Function name: <b>staticValue</b></br>Compiled variables: !0=$my_static </br><table width="80%" border=1 ><tr><td bgcolor=#9966FF> line</td><td bgcolor=#9966FF> #</td><td bgcolor=#9966FF> op</td><td bgcolor=#9966FF> fetch</td><td bgcolor=#9966FF> ext</td><td bgcolor=#9966FF> return</td><td bgcolor=#9966FF> operands</td></tr><tr><td> 10</td><td> 0</td><td> ZEND_FETCH_CLASS</td><td >   </td><td >   </td><td >   </td><td >   </td></tr><tr><td >   </td><td> 1</td><td> FETCH_R</td><td> staticmember</td><td >   </td><td> $1</td><td> 'my_static'</td></tr><tr><td >   </td><td> 2</td><td> RETURN</td><td >   </td><td >   </td><td >   </td><td> $1</td></tr><tr><td> 11</td><td> 3</td><td> RETURN</td><td >   </td><td >   </td><td >   </td><td> null</td></tr></table></br>Function name: <b>fooStatic</b></br>Compiled variables: !0=$my_static </br><table width="80%" border=1 ><tr><td bgcolor=#9966FF> line</td><td bgcolor=#9966FF> #</td><td bgcolor=#9966FF> op</td><td bgcolor=#9966FF> fetch</td><td bgcolor=#9966FF> ext</td><td bgcolor=#9966FF> return</td><td bgcolor=#9966FF> operands</td></tr><tr><td> 16</td><td> 0</td><td> ZEND_FETCH_CLASS</td><td >   </td><td >   </td><td> :0</td><td >   </td></tr><tr><td >   </td><td> 1</td><td> FETCH_R</td><td> staticmember</td><td >   </td><td> $1</td><td> 'my_static'</td></tr><tr><td >   </td><td> 2</td><td> ECHO</td><td >   </td><td >   </td><td >   </td><td> $1</td></tr><tr><td> 17</td><td> 3</td><td> RETURN</td><td >   </td><td >   </td><td >   </td><td> null</td></tr></table></br><h2>OPCODE :<a name=DIV>DIV</a></h2><h3> PHP source code </h3><textarea style="background-color: #FFFF66" rows=7 cols="130"><?php

* Divides "value1" by "value2" and stores the result into "result".

* opcode number: 4

echo 6/3;

* Call a function. Following multiple SEND_VAL, SEND_VAR or SEND_REF.

* opcode number: 60

$a = phpinfo();

* Call a function by name. Following INIT_FCALL_BY_NAME and multiple SEND_VAL, SEND_VAR or SEND_REF.

* opcode number: 61

$x = 'phpinfo';

$a = $x();

* Dump text

* opcode number: 40

echo "hello world";

* no longer surpress error messages

* opcode number: 58

$my_file = @file ('non_existent_file') or

die ("error:'$php_errormsg'");

?></textarea></br><h3> PHP opcodes </h3>Function name: <b>(null)</b></br>Compiled variables: !0=$my_file, !1=$php_errormsg </br><table width="80%" border=1 ><tr><td bgcolor=#9966FF> line</td><td bgcolor=#9966FF> #</td><td bgcolor=#9966FF> op</td><td bgcolor=#9966FF> fetch</td><td bgcolor=#9966FF> ext</td><td bgcolor=#9966FF> return</td><td bgcolor=#9966FF> operands</td></tr><tr><td> 6</td><td> 0</td><td> BEGIN_SILENCE</td><td >   </td><td >   </td><td> ~0</td><td >   </td></tr><tr><td >   </td><td> 1</td><td> SEND_VAL</td><td >   </td><td >   </td><td >   </td><td> 'non_existent_file'</td></tr><tr><td >   </td><td> 2</td><td> DO_FCALL</td><td >   </td><td> 1</td><td >   </td><td> 'file'</td></tr><tr><td >   </td><td> 3</td><td> END_SILENCE</td><td >   </td><td >   </td><td >   </td><td> ~0</td></tr><tr><td >   </td><td> 4</td><td> ASSIGN</td><td >   </td><td >   </td><td> $2</td><td> !0,$1</td></tr><tr><td >   </td><td> 5</td><td> JMPNZ_EX</td><td >   </td><td >   </td><td> ~3</td><td> $2,->11</td></tr><tr><td> 7</td><td> 6</td><td> ADD_STRING</td><td >   </td><td >   </td><td> ~4</td><td> 'error%3A%27'</td></tr><tr><td >   </td><td> 7</td><td> ADD_VAR</td><td >   </td><td >   </td><td> ~4</td><td> ~4,!1</td></tr><tr><td >   </td><td> 8</td><td> ADD_CHAR</td><td >   </td><td >   </td><td> ~4</td><td> ~4,39</td></tr><tr><td >   </td><td> 9</td><td> EXIT</td><td >   </td><td >   </td><td >   </td><td> ~4</td></tr><tr><td >   </td><td> 10</td><td> BOOL</td><td >   </td><td >   </td><td> ~3</td><td> true</td></tr><tr><td >   </td><td> 11</td><td> FREE</td><td >   </td><td >   </td><td >   </td><td> ~3</td></tr><tr><td> 8</td><td> 12</td><td> RETURN</td><td >   </td><td >   </td><td >   </td><td> 1</td></tr></table></br><h2>OPCODE :<a name=EXIT>EXIT</a></h2><h3> PHP source code </h3><textarea style="background-color: #FFFF66" rows=7 cols="130"><?php

* Exit running after dumping "message".

* opcode number: 79

die("foobar");

* opcode number: 102

* No sample PHP yet */

?></textarea></br><h3> PHP opcodes </h3><h2>OPCODE :<a name=EXT_FCALL_END>EXT_FCALL_END</a></h2><h3> PHP source code </h3><textarea style="background-color: #FFFF66" rows=6 cols="130"><?php

* opcode number: 103

* No sample PHP yet */

?></textarea></br><h3> PHP opcodes </h3><h2>OPCODE :<a name=EXT_NOP>EXT_NOP</a></h2><h3> PHP source code </h3><textarea style="background-color: #FFFF66" rows=6 cols="130"><?php

* opcode number: 104

* No sample PHP yet */

?></textarea></br><h3> PHP opcodes </h3><h2>OPCODE :<a name=EXT_STMT>EXT_STMT</a></h2><h3> PHP source code </h3><textarea style="background-color: #FFFF66" rows=6 cols="130"><?php

* opcode number: 101

* No sample PHP yet */

?></textarea></br><h3> PHP opcodes </h3><h2>OPCODE :<a name=FETCH_CLASS>FETCH_CLASS</a></h2><h3> PHP source code </h3><textarea style="background-color: #FFFF66" rows=7 cols="130"><?php

* opcode number: 109

$obj = new A();

* Fetch the constant value bound to the specified name (name) and stores it into a variable (result).

* opcode number: 99

define("FOO", "something");

echo FOO;

* opcode number: 93

function foo(&$x)

{

print($x);

}

$x = array(0, 1, 2, 3, 4, 5);

$z = "foo";

$z($x[0]);

?></textarea></br><h3> PHP opcodes </h3>Function name: <b>(null)</b></br>Compiled variables: !0=$x, !1=$z </br><table width="80%" border=1 ><tr><td bgcolor=#9966FF> line</td><td bgcolor=#9966FF> #</td><td bgcolor=#9966FF> op</td><td bgcolor=#9966FF> fetch</td><td bgcolor=#9966FF> ext</td><td bgcolor=#9966FF> return</td><td bgcolor=#9966FF> operands</td></tr><tr><td> 7</td><td> 0</td><td> NOP</td><td >   </td><td >   </td><td >   </td><td >   </td></tr><tr><td> 12</td><td> 1</td><td> INIT_ARRAY</td><td >   </td><td >   </td><td> ~0</td><td> 0</td></tr><tr><td >   </td><td> 2</td><td> ADD_ARRAY_ELEMENT</td><td >   </td><td >   </td><td> ~0</td><td> 1</td></tr><tr><td >   </td><td> 3</td><td> ADD_ARRAY_ELEMENT</td><td >   </td><td >   </td><td> ~0</td><td> 2</td></tr><tr><td >   </td><td> 4</td><td> ADD_ARRAY_ELEMENT</td><td >   </td><td >   </td><td> ~0</td><td> 3</td></tr><tr><td >   </td><td> 5</td><td> ADD_ARRAY_ELEMENT</td><td >   </td><td >   </td><td> ~0</td><td> 4</td></tr><tr><td >   </td><td> 6</td><td> ADD_ARRAY_ELEMENT</td><td >   </td><td >   </td><td> ~0</td><td> 5</td></tr><tr><td >   </td><td> 7</td><td> ASSIGN</td><td >   </td><td >   </td><td >   </td><td> !0,~0</td></tr><tr><td> 13</td><td> 8</td><td> ASSIGN</td><td >   </td><td >   </td><td >   </td><td> !1,'foo'</td></tr><tr><td> 15</td><td> 9</td><td> INIT_FCALL_BY_NAME</td><td >   </td><td >   </td><td >   </td><td> !1</td></tr><tr><td >   </td><td> 10</td><td> FETCH_DIM_FUNC_ARG</td><td >   </td><td >   </td><td> $3</td><td> !0,0</td></tr><tr><td >   </td><td> 11</td><td> SEND_VAR</td><td >   </td><td >   </td><td >   </td><td> $3</td></tr><tr><td >   </td><td> 12</td><td> DO_FCALL_BY_NAME</td><td >   </td><td> 1</td><td >   </td><td >   </td></tr><tr><td> 17</td><td> 13</td><td> RETURN</td><td >   </td><td >   </td><td >   </td><td> 1</td></tr></table></br>Function name: <b>foo</b></br>Compiled variables: !0=$x </br><table width="80%" border=1 ><tr><td bgcolor=#9966FF> line</td><td bgcolor=#9966FF> #</td><td bgcolor=#9966FF> op</td><td bgcolor=#9966FF> fetch</td><td bgcolor=#9966FF> ext</td><td bgcolor=#9966FF> return</td><td bgcolor=#9966FF> operands</td></tr><tr><td> 7</td><td> 0</td><td> RECV</td><td >   </td><td >   </td><td >   </td><td> 1</td></tr><tr><td> 9</td><td> 1</td><td> PRINT</td><td >   </td><td >   </td><td> ~0</td><td> !0</td></tr><tr><td >   </td><td> 2</td><td> FREE</td><td >   </td><td >   </td><td >   </td><td> ~0</td></tr><tr><td> 10</td><td> 3</td><td> RETURN</td><td >   </td><td >   </td><td >   </td><td> null</td></tr></table></br><h2>OPCODE :<a name=FETCH_DIM_IS>FETCH_DIM_IS</a></h2><h3> PHP source code </h3><textarea style="background-color: #FFFF66" rows=6 cols="130"><?php

* opcode number: 90

* No sample PHP yet */

?></textarea></br><h3> PHP opcodes </h3><h2>OPCODE :<a name=FETCH_DIM_R>FETCH_DIM_R</a></h2><h3> PHP source code </h3><textarea style="background-color: #FFFF66" rows=9 cols="130"><?php

* Fetch the value of the element at "index" in "array-value" to store it in "result". Read-only?

* opcode number: 81

$x = array(1,2,3);

$a = 'x';

echo $$a[0];

?></textarea></br><h3> PHP opcodes </h3>Function name: <b>(null)</b></br>Compiled variables: !0=$x, !1=$a </br><table width="80%" border=1 ><tr><td bgcolor=#9966FF> line</td><td bgcolor=#9966FF> #</td><td bgcolor=#9966FF> op</td><td bgcolor=#9966FF> fetch</td><td bgcolor=#9966FF> ext</td><td bgcolor=#9966FF> return</td><td bgcolor=#9966FF> operands</td></tr><tr><td> 6</td><td> 0</td><td> INIT_ARRAY</td><td >   </td><td >   </td><td> ~0</td><td> 1</td></tr><tr><td >   </td><td> 1</td><td> ADD_ARRAY_ELEMENT</td><td >   </td><td >   </td><td> ~0</td><td> 2</td></tr><tr><td >   </td><td> 2</td><td> ADD_ARRAY_ELEMENT</td><td >   </td><td >   </td><td> ~0</td><td> 3</td></tr><tr><td >   </td><td> 3</td><td> ASSIGN</td><td >   </td><td >   </td><td >   </td><td> !0,~0</td></tr><tr><td> 7</td><td> 4</td><td> ASSIGN</td><td >   </td><td >   </td><td >   </td><td> !1,'x'</td></tr><tr><td> 8</td><td> 5</td><td> FETCH_DIM_R</td><td >   </td><td >   </td><td> $3</td><td> !1,0</td></tr><tr><td >   </td><td> 6</td><td> FETCH_R</td><td> local</td><td >   </td><td> $4</td><td> $3</td></tr><tr><td >   </td><td> 7</td><td> ECHO</td><td >   </td><td >   </td><td >   </td><td> $4</td></tr><tr><td> 9</td><td> 8</td><td> RETURN</td><td >   </td><td >   </td><td >   </td><td> 1</td></tr></table></br><h2>OPCODE :<a name=FETCH_DIM_RW>FETCH_DIM_RW</a></h2><h3> PHP source code </h3><textarea style="background-color: #FFFF66" rows=9 cols="130"><?php

* Fetch the value of the element at "index" in "array-value" to store it in "result".

* opcode number: 87

$x = array(1,2,3);

$a = 'x';

$$a[0]++;

?></textarea></br><h3> PHP opcodes </h3>Function name: <b>(null)</b></br>Compiled variables: !0=$x, !1=$a </br><table width="80%" border=1 ><tr><td bgcolor=#9966FF> line</td><td bgcolor=#9966FF> #</td><td bgcolor=#9966FF> op</td><td bgcolor=#9966FF> fetch</td><td bgcolor=#9966FF> ext</td><td bgcolor=#9966FF> return</td><td bgcolor=#9966FF> operands</td></tr><tr><td> 6</td><td> 0</td><td> INIT_ARRAY</td><td >   </td><td >   </td><td> ~0</td><td> 1</td></tr><tr><td >   </td><td> 1</td><td> ADD_ARRAY_ELEMENT</td><td >   </td><td >   </td><td> ~0</td><td> 2</td></tr><tr><td >   </td><td> 2</td><td> ADD_ARRAY_ELEMENT</td><td >   </td><td >   </td><td> ~0</td><td> 3</td></tr><tr><td >   </td><td> 3</td><td> ASSIGN</td><td >   </td><td >   </td><td >   </td><td> !0,~0</td></tr><tr><td> 7</td><td> 4</td><td> ASSIGN</td><td >   </td><td >   </td><td >   </td><td> !1,'x'</td></tr><tr><td> 8</td><td> 5</td><td> FETCH_DIM_R</td><td >   </td><td >   </td><td> $3</td><td> !1,0</td></tr><tr><td >   </td><td> 6</td><td> FETCH_RW</td><td> local</td><td >   </td><td> $4</td><td> $3</td></tr><tr><td >   </td><td> 7</td><td> POST_INC</td><td >   </td><td >   </td><td> ~5</td><td> $4</td></tr><tr><td >   </td><td> 8</td><td> FREE</td><td >   </td><td >   </td><td >   </td><td> ~5</td></tr><tr><td> 9</td><td> 9</td><td> RETURN</td><td >   </td><td >   </td><td >   </td><td> 1</td></tr></table></br><h2>OPCODE :<a name=FETCH_DIM_TMP_VAR>FETCH_DIM_TMP_VAR</a></h2><h3> PHP source code </h3><textarea style="background-color: #FFFF66" rows=7 cols="130"><?php

* Fetch an entry of an array from a temporal variable?

* opcode number: 98

list($x) = array("X");

* Fetch an entry of an array variable for the purpose of unset() operation.

* opcode number: 96

* No sample PHP yet */

?></textarea></br><h3> PHP opcodes </h3><h2>OPCODE :<a name=FETCH_DIM_W>FETCH_DIM_W</a></h2><h3> PHP source code </h3><textarea style="background-color: #FFFF66" rows=23 cols="130"><?php

* Fetch the value of the element at "index" in "array-value" to store it in "result". Write-only?

* opcode number: 84

$a = 1;

while($a > 0){

$a = 0;

}

/*$input =array(1,2,3);

while (list($var,) = @each($input)){

unset($$var);

}*/

/*$a = array(1,2,3);

$x = 'a';

$$x[0] = 1;*/

/*while ($b = each($a)) {

print $b;

}*/

?></textarea></br><h3> PHP opcodes </h3>Function name: <b>(null)</b></br>Compiled variables: !0=$a </br><table width="80%" border=1 ><tr><td bgcolor=#9966FF> line</td><td bgcolor=#9966FF> #</td><td bgcolor=#9966FF> op</td><td bgcolor=#9966FF> fetch</td><td bgcolor=#9966FF> ext</td><td bgcolor=#9966FF> return</td><td bgcolor=#9966FF> operands</td></tr><tr><td> 6</td><td> 0</td><td> ASSIGN</td><td >   </td><td >   </td><td >   </td><td> !0,1</td></tr><tr><td> 7</td><td> 1</td><td> IS_SMALLER</td><td >   </td><td >   </td><td> ~1</td><td> 0,!0</td></tr><tr><td >   </td><td> 2</td><td> JMPZ</td><td >   </td><td >   </td><td >   </td><td> ~1,->5</td></tr><tr><td> 8</td><td> 3</td><td> ASSIGN</td><td >   </td><td >   </td><td >   </td><td> !0,0</td></tr><tr><td> 9</td><td> 4</td><td> JMP</td><td >   </td><td >   </td><td >   </td><td> ->1</td></tr><tr><td> 23</td><td> 5</td><td> RETURN</td><td >   </td><td >   </td><td >   </td><td> 1</td></tr></table></br><h2>OPCODE :<a name=FETCH_FUNC_ARG>FETCH_FUNC_ARG</a></h2><h3> PHP source code </h3><textarea style="background-color: #FFFF66" rows=16 cols="130"><?php

* opcode number: 92

function foo($x)

{

}

$x = 1;

$y = "x";

$z = "foo";

$z($$y);

?></textarea></br><h3> PHP opcodes </h3>Function name: <b>(null)</b></br>Compiled variables: !0=$x, !1=$y, !2=$z </br><table width="80%" border=1 ><tr><td bgcolor=#9966FF> line</td><td bgcolor=#9966FF> #</td><td bgcolor=#9966FF> op</td><td bgcolor=#9966FF> fetch</td><td bgcolor=#9966FF> ext</td><td bgcolor=#9966FF> return</td><td bgcolor=#9966FF> operands</td></tr><tr><td> 6</td><td> 0</td><td> NOP</td><td >   </td><td >   </td><td >   </td><td >   </td></tr><tr><td> 10</td><td> 1</td><td> ASSIGN</td><td >   </td><td >   </td><td >   </td><td> !0,1</td></tr><tr><td> 11</td><td> 2</td><td> ASSIGN</td><td >   </td><td >   </td><td >   </td><td> !1,'x'</td></tr><tr><td> 12</td><td> 3</td><td> ASSIGN</td><td >   </td><td >   </td><td >   </td><td> !2,'foo'</td></tr><tr><td> 14</td><td> 4</td><td> INIT_FCALL_BY_NAME</td><td >   </td><td >   </td><td >   </td><td> !2</td></tr><tr><td >   </td><td> 5</td><td> FETCH_FUNC_ARG</td><td> local</td><td >   </td><td> $3</td><td> !1</td></tr><tr><td >   </td><td> 6</td><td> SEND_VAR</td><td >   </td><td >   </td><td >   </td><td> $3</td></tr><tr><td >   </td><td> 7</td><td> DO_FCALL_BY_NAME</td><td >   </td><td> 1</td><td >   </td><td >   </td></tr><tr><td> 16</td><td> 8</td><td> RETURN</td><td >   </td><td >   </td><td >   </td><td> 1</td></tr></table></br>Function name: <b>foo</b></br>Compiled variables: !0=$x </br><table width="80%" border=1 ><tr><td bgcolor=#9966FF> line</td><td bgcolor=#9966FF> #</td><td bgcolor=#9966FF> op</td><td bgcolor=#9966FF> fetch</td><td bgcolor=#9966FF> ext</td><td bgcolor=#9966FF> return</td><td bgcolor=#9966FF> operands</td></tr><tr><td> 6</td><td> 0</td><td> RECV</td><td >   </td><td >   </td><td >   </td><td> 1</td></tr><tr><td> 8</td><td> 1</td><td> RETURN</td><td >   </td><td >   </td><td >   </td><td> null</td></tr></table></br><h2>OPCODE :<a name=FETCH_IS>FETCH_IS</a></h2><h3> PHP source code </h3><textarea style="background-color: #FFFF66" rows=9 cols="130"><?php

* Fetch the value from variable which is to be used to test if it is set or not, through isset()/isempty().

* opcode number: 89

echo isset($_SESSION['userid']);

echo isset($_SESSION['userid'][1]);

echo isset($_SESSION->prop->prop);

* opcode number: 94

include './classA.php';

function foo(&$x)

{

print($x);

}

$z = "foo";

$obj = new A();

print $obj->num;

$z($obj->num);

?></textarea></br><h3> PHP opcodes </h3>Function name: <b>(null)</b></br>Compiled variables: !0=$z, !1=$obj </br><table width="80%" border=1 ><tr><td bgcolor=#9966FF> line</td><td bgcolor=#9966FF> #</td><td bgcolor=#9966FF> op</td><td bgcolor=#9966FF> fetch</td><td bgcolor=#9966FF> ext</td><td bgcolor=#9966FF> return</td><td bgcolor=#9966FF> operands</td></tr><tr><td> 6</td><td> 0</td><td> INCLUDE_OR_EVAL</td><td >   </td><td >   </td><td >   </td><td> '.%2FclassA.php',INCLUDE</td></tr><tr><td> 8</td><td> 1</td><td> NOP</td><td >   </td><td >   </td><td >   </td><td >   </td></tr><tr><td> 13</td><td> 2</td><td> ASSIGN</td><td >   </td><td >   </td><td >   </td><td> !0,'foo'</td></tr><tr><td> 15</td><td> 3</td><td> ZEND_FETCH_CLASS</td><td >   </td><td >   </td><td> :2</td><td> 'A'</td></tr><tr><td >   </td><td> 4</td><td> NEW</td><td >   </td><td >   </td><td> $3</td><td> :2</td></tr><tr><td >   </td><td> 5</td><td> DO_FCALL_BY_NAME</td><td >   </td><td> 0</td><td >   </td><td >   </td></tr><tr><td >   </td><td> 6</td><td> ASSIGN</td><td >   </td><td >   </td><td >   </td><td> !1,$3</td></tr><tr><td> 16</td><td> 7</td><td> FETCH_OBJ_R</td><td >   </td><td >   </td><td> $6</td><td> !1,'num'</td></tr><tr><td >   </td><td> 8</td><td> PRINT</td><td >   </td><td >   </td><td> ~7</td><td> $6</td></tr><tr><td >   </td><td> 9</td><td> FREE</td><td >   </td><td >   </td><td >   </td><td> ~7</td></tr><tr><td> 17</td><td> 10</td><td> INIT_FCALL_BY_NAME</td><td >   </td><td >   </td><td >   </td><td> !0</td></tr><tr><td >   </td><td> 11</td><td> FETCH_OBJ_FUNC_ARG</td><td >   </td><td >   </td><td> $8</td><td> !1,'num'</td></tr><tr><td >   </td><td> 12</td><td> SEND_VAR</td><td >   </td><td >   </td><td >   </td><td> $8</td></tr><tr><td >   </td><td> 13</td><td> DO_FCALL_BY_NAME</td><td >   </td><td> 1</td><td >   </td><td >   </td></tr><tr><td> 19</td><td> 14</td><td> RETURN</td><td >   </td><td >   </td><td >   </td><td> 1</td></tr></table></b 10BC8 r>Function name: <b>foo</b></br>Compiled variables: !0=$x </br><table width="80%" border=1 ><tr><td bgcolor=#9966FF> line</td><td bgcolor=#9966FF> #</td><td bgcolor=#9966FF> op</td><td bgcolor=#9966FF> fetch</td><td bgcolor=#9966FF> ext</td><td bgcolor=#9966FF> return</td><td bgcolor=#9966FF> operands</td></tr><tr><td> 8</td><td> 0</td><td> RECV</td><td >   </td><td >   </td><td >   </td><td> 1</td></tr><tr><td> 10</td><td> 1</td><td> PRINT</td><td >   </td><td >   </td><td> ~0</td><td> !0</td></tr><tr><td >   </td><td> 2</td><td> FREE</td><td >   </td><td >   </td><td >   </td><td> ~0</td></tr><tr><td> 11</td><td> 3</td><td> RETURN</td><td >   </td><td >   </td><td >   </td><td> null</td></tr></table></br>Function name: <b>foo</b></br>Compiled variables: !0=$x </br><table width="80%" border=1 ><tr><td bgcolor=#9966FF> line</td><td bgcolor=#9966FF> #</td><td bgcolor=#9966FF> op</td><td bgcolor=#9966FF> fetch</td><td bgcolor=#9966FF> ext</td><td bgcolor=#9966FF> return</td><td bgcolor=#9966FF> operands</td></tr><tr><td> 8</td><td> 0</td><td> RECV</td><td >   </td><td >   </td><td >   </td><td> 1</td></tr><tr><td> 10</td><td> 1</td><td> PRINT</td><td >   </td><td >   </td><td> ~0</td><td> !0</td></tr><tr><td >   </td><td> 2</td><td> FREE</td><td >   </td><td >   </td><td >   </td><td> ~0</td></tr><tr><td> 11</td><td> 3</td><td> RETURN</td><td >   </td><td >   </td><td >   </td><td> null</td></tr></table></br><h2>OPCODE :<a name=FETCH_OBJ_IS>FETCH_OBJ_IS</a></h2><h3> PHP source code </h3><textarea style="background-color: #FFFF66" rows=6 cols="130"><?php

* opcode number: 91

* No sample PHP yet */

?></textarea></br><h3> PHP opcodes </h3><h2>OPCODE :<a name=FETCH_OBJ_R>FETCH_OBJ_R</a></h2><h3> PHP source code </h3><textarea style="background-color: #FFFF66" rows=9 cols="130"><?php

* Fetch the "prop-name" property value of this object. Read-only?

* opcode number: 82

$x = new A();

$a = 'x';

echo $$a->num;

?></textarea></br><h3> PHP opcodes </h3>Function name: <b>(null)</b></br>Compiled variables: !0=$x, !1=$a </br><table width="80%" border=1 ><tr><td bgcolor=#9966FF> line</td><td bgcolor=#9966FF> #</td><td bgcolor=#9966FF> op</td><td bgcolor=#9966FF> fetch</td><td bgcolor=#9966FF> ext</td><td bgcolor=#9966FF> return</td><td bgcolor=#9966FF> operands</td></tr><tr><td> 6</td><td> 0</td><td> ZEND_FETCH_CLASS</td><td >   </td><td >   </td><td> :0</td><td> 'A'</td></tr><tr><td >   </td><td> 1</td><td> NEW</td><td >   </td><td >   </td><td> $1</td><td> :0</td></tr><tr><td >   </td><td> 2</td><td> DO_FCALL_BY_NAME</td><td >   </td><td> 0</td><td >   </td><td >   </td></tr><tr><td >   </td><td> 3</td><td> ASSIGN</td><td >   </td><td >   </td><td >   </td><td> !0,$1</td></tr><tr><td> 7</td><td> 4</td><td> ASSIGN</td><td >   </td><td >   </td><td >   </td><td> !1,'x'</td></tr><tr><td> 8</td><td> 5</td><td> FETCH_R</td><td> local</td><td >   </td><td> $5</td><td> !1</td></tr><tr><td >   </td><td> 6</td><td> FETCH_OBJ_R</td><td >   </td><td >   </td><td> $6</td><td> $5,'num'</td></tr><tr><td >   </td><td> 7</td><td> ECHO</td><td >   </td><td >   </td><td >   </td><td> $6</td></tr><tr><td> 9</td><td> 8</td><td> RETURN</td><td >   </td><td >   </td><td >   </td><td> 1</td></tr></table></br><h2>OPCODE :<a name=FETCH_OBJ_RW>FETCH_OBJ_RW</a></h2><h3> PHP source code </h3><textarea style="background-color: #FFFF66" rows=9 cols="130"><?php

* Fetch the "prop-name" property value of this object.

* opcode number: 88

$x = new A();

$a = 'x';

$$a->num++;

?></textarea></br><h3> PHP opcodes </h3>Function name: <b>(null)</b></br>Compiled variables: !0=$x, !1=$a </br><table width="80%" border=1 ><tr><td bgcolor=#9966FF> line</td><td bgcolor=#9966FF> #</td><td bgcolor=#9966FF> op</td><td bgcolor=#9966FF> fetch</td><td bgcolor=#9966FF> ext</td><td bgcolor=#9966FF> return</td><td bgcolor=#9966FF> operands</td></tr><tr><td> 6</td><td> 0</td><td> ZEND_FETCH_CLASS</td><td >   </td><td >   </td><td> :0</td><td> 'A'</td></tr><tr><td >   </td><td> 1</td><td> NEW</td><td >   </td><td >   </td><td> $1</td><td> :0</td></tr><tr><td >   </td><td> 2</td><td> DO_FCALL_BY_NAME</td><td >   </td><td> 0</td><td >   </td><td >   </td></tr><tr><td >   </td><td> 3</td><td> ASSIGN</td><td >   </td><td >   </td><td >   </td><td> !0,$1</td></tr><tr><td> 7</td><td> 4</td><td> ASSIGN</td><td >   </td><td >   </td><td >   </td><td> !1,'x'</td></tr><tr><td> 8</td><td> 5</td><td> FETCH_RW</td><td> local</td><td >   </td><td> $5</td><td> !1</td></tr><tr><td >   </td><td> 6</td><td> ZEND_POST_INC_OBJ</td><td >   </td><td >   </td><td> ~7</td><td> $5,'num'</td></tr><tr><td >   </td><td> 7</td><td> FREE</td><td >   </td><td >   </td><td >   </td><td> ~7</td></tr><tr><td> 9</td><td> 8</td><td> RETURN</td><td >   </td><td >   </td><td >   </td><td> 1</td></tr></table></br><h2>OPCODE :<a name=FETCH_OBJ_UNSET>FETCH_OBJ_UNSET</a></h2><h3> PHP source code </h3><textarea style="background-color: #FFFF66" rows=6 cols="130"><?php

* Fetch a property of an object variable for the purpose of unset() operation.

* opcode number: 97

* No sample PHP yet */

?></textarea></br><h3> PHP opcodes </h3><h2>OPCODE :<a name=FETCH_OBJ_W>FETCH_OBJ_W</a></h2><h3> PHP source code </h3><textarea style="background-color: #FFFF66" rows=9 cols="130"><?php

* Fetch the "prop-name" property value of this object. Write-only?

* opcode number: 85

$x = new A();

$a = 'x';

$$a->num = 1;;

?></textarea></br><h3> PHP opcodes </h3>Function name: <b>(null)</b></br>Compiled variables: !0=$x, !1=$a </br><table width="80%" border=1 ><tr><td bgcolor=#9966FF> line</td><td bgcolor=#9966FF> #</td><td bgcolor=#9966FF> op</td><td bgcolor=#9966FF> fetch</td><td bgcolor=#9966FF> ext</td><td bgcolor=#9966FF> return</td><td bgcolor=#9966FF> operands</td></tr><tr><td> 6</td><td> 0</td><td> ZEND_FETCH_CLASS</td><td >   </td><td >   </td><td> :0</td><td> 'A'</td></tr><tr><td >   </td><td> 1</td><td> NEW</td><td >   </td><td >   </td><td> $1</td><td> :0</td></tr><tr><td >   </td><td> 2</td><td> DO_FCALL_BY_NAME</td><td >   </td><td> 0</td><td >   </td><td >   </td></tr><tr><td >   </td><td> 3</td><td> ASSIGN</td><td >   </td><td >   </td><td >   </td><td> !0,$1</td></tr><tr><td> 7</td><td> 4</td><td> ASSIGN</td><td >   </td><td >   </td><td >   </td><td> !1,'x'</td></tr><tr><td> 8</td><td> 5</td><td> FETCH_W</td><td> local</td><td >   </td><td> $5</td><td> !1</td></tr><tr><td >   </td><td> 6</td><td> ZEND_ASSIGN_OBJ</td><td >   </td><td >   </td><td >   </td><td> $5,'num'</td></tr><tr><td >   </td><td> 7</td><td> ZEND_OP_DATA</td><td >   </td><td >   </td><td >   </td><td> 1</td></tr><tr><td> 9</td><td> 8</td><td> RETURN</td><td >   </td><td >   </td><td >   </td><td> 1</td></tr></table></br><h2>OPCODE :<a name=FETCH_R>FETCH_R</a></h2><h3> PHP source code </h3><textarea style="background-color: #FFFF66" rows=9 cols="130"><?php

* Fetch the value of the varible of "name" to assign it to a variable? Read-only?

* opcode number: 80

$x = 1;

$a = 'x';

echo $$a;

* Fetch the value of the varible of "name" to assign it to a variable?

* opcode number: 86

$x = 1;

$a = 'x';

$$a++;

?></textarea></br><h3> PHP opcodes </h3>Function name: <b>(null)</b></br>Compiled variables: !0=$x, !1=$a </br><table width="80%" border=1 ><tr><td bgcolor=#9966FF> line</td><td bgcolor=#9966FF> #</td><td bgcolor=#9966FF> op</td><td bgcolor=#9966FF> fetch</td><td bgcolor=#9966FF> ext</td><td bgcolor=#9966FF> return</td><td bgcolor=#9966FF> operands</td></tr><tr><td> 6</td><td> 0</td><td> ASSIGN</td><td >   </td><td >   </td><td >   </td><td> !0,1</td></tr><tr><td> 7</td><td> 1</td><td> ASSIGN</td><td >   </td><td >   </td><td >   </td><td> !1,'x'</td></tr><tr><td> 8</td><td> 2</td><td> FETCH_RW</td><td> local</td><td >   </td><td> $2</td><td> !1</td></tr><tr><td >   </td><td> 3</td><td> POST_INC</td><td >   </td><td >   </td><td> ~3</td><td> $2</td></tr><tr><td >   </td><td> 4</td><td> FREE</td><td >   </td><td >   </td><td >   </td><td> ~3</td></tr><tr><td> 9</td><td> 5</td><td> RETURN</td><td >   </td><td >   </td><td >   </td><td> 1</td></tr></table></br><h2>OPCODE :<a name=FETCH_UNSET>FETCH_UNSET</a></h2><h3> PHP source code </h3><textarea style="background-color: #FFFF66" rows=6 cols="130"><?php

* Fetch a variable for the purpose of unset() operation.

* opcode number: 95

* No sample PHP yet */

?></textarea></br><h3> PHP opcodes </h3><h2>OPCODE :<a name=FETCH_W>FETCH_W</a></h2><h3> PHP source code </h3><textarea style="background-color: #FFFF66" rows=9 cols="130"><?php

* Fetch the value of the varible of "name" to assign it to a variable? Write-only?

* opcode number: 83

$x = 1;

$a = 'x';

$$a = 2;

* Fetch an element from iterator. If no element is available, jump to address. Followed by OP_DATA?

* opcode number: 78

$a = array(1,2,3);

foreach($a as $num){

print $num;

}

?></textarea></br><h3> PHP opcodes </h3>Function name: <b>(null)</b></br>Compiled variables: !0=$a, !1=$num </br><table width="80%" border=1 ><tr><td bgcolor=#9966FF> line</td><td bgcolor=#9966FF> #</td><td bgcolor=#9966FF> op</td><td bgcolor=#9966FF> fetch</td><td bgcolor=#9966FF> ext</td><td bgcolor=#9966FF> return</td><td bgcolor=#9966FF> operands</td></tr><tr><td> 6</td><td> 0</td><td> INIT_ARRAY</td><td >   </td><td >   </td><td> ~0</td><td> 1</td></tr><tr><td >   </td><td> 1</td><td> ADD_ARRAY_ELEMENT</td><td >   </td><td >   </td><td> ~0</td><td> 2</td></tr><tr><td >   </td><td> 2</td><td> ADD_ARRAY_ELEMENT</td><td >   </td><td >   </td><td> ~0</td><td> 3</td></tr><tr><td >   </td><td> 3</td><td> ASSIGN</td><td >   </td><td >   </td><td >   </td><td> !0,~0</td></tr><tr><td> 7</td><td> 4</td><td> FE_RESET</td><td >   </td><td >   </td><td> $2</td><td> !0,->11</td></tr><tr><td >   </td><td> 5</td><td> FE_FETCH</td><td >   </td><td >   </td><td> $3</td><td> $2,->11</td></tr><tr><td >   </td><td> 6</td><td> ZEND_OP_DATA</td><td >   </td><td >   </td><td >   </td><td >   </td></tr><tr><td >   </td><td> 7</td><td> ASSIGN</td><td >   </td><td >   </td><td >   </td><td> !1,$3</td></tr><tr><td> 8</td><td> 8</td><td> PRINT</td><td >   </td><td >   </td><td> ~5</td><td> !1</td></tr><tr><td >   </td><td> 9</td><td> FREE</td><td >   </td><td >   </td><td >   </td><td> ~5</td></tr><tr><td> 9</td><td> 10</td><td> JMP</td><td >   </td><td >   </td><td >   </td><td> ->5</td></tr><tr><td >   </td><td> 11</td><td> SWITCH_FREE</td><td >   </td><td >   </td><td >   </td><td> $2</td></tr><tr><td> 10</td><td> 12</td><td> RETURN</td><td >   </td><td >   </td><td >   </td><td> 1</td></tr></table></br><h2>OPCODE :<a name=FE_RESET>FE_RESET</a></h2><h3> PHP source code </h3><textarea style="background-color: #FFFF66" rows=10 cols="130"><?php

* Initialize an iterator on array-value. If the array is empty, jump to address. Followed by FE_FETCH.

* opcode number: 77

$a = array(1,2,3);

foreach($a as $num){

print $num;

}

?></textarea></br><h3> PHP opcodes </h3>Function name: <b>(null)</b></br>Compiled variables: !0=$a, !1=$num </br><table width="80%" border=1 ><tr><td bgcolor=#9966FF> line</td><td bgcolor=#9966FF> #</td><td bgcolor=#9966FF> op</td><td bgcolor=#9966FF> fetch</td><td bgcolor=#9966FF> ext</td><td bgcolor=#9966FF> return</td><td bgcolor=#9966FF> operands</td></tr><tr><td> 6</td><td> 0</td><td> INIT_ARRAY</td><td >   </td><td >   </td><td> ~0</td><td> 1</td></tr><tr><td >   </td><td> 1</td><td> ADD_ARRAY_ELEMENT</td><td >   </td><td >   </td><td> ~0</td><td> 2</td></tr><tr><td >   </td><td> 2</td><td> ADD_ARRAY_ELEMENT</td><td >   </td><td >   </td><td> ~0</td><td> 3</td></tr><tr><td >   </td><td> 3</td><td> ASSIGN</td><td >   </td><td >   </td><td >   </td><td> !0,~0</td></tr><tr><td> 7</td><td> 4</td><td> FE_RESET</td><td >   </td><td >   </td><td> $2</td><td> !0,->11</td></tr><tr><td >   </td><td> 5</td><td> FE_FETCH</td><td >   </td><td >   </td><td> $3</td><td> $2,->11</td></tr><tr><td >   </td><td> 6</td><td> ZEND_OP_DATA</td><td >   </td><td >   </td><td >   </td><td >   </td></tr><tr><td >   </td><td> 7</td><td> ASSIGN</td><td >   </td><td >   </td><td >   </td><td> !1,$3</td></tr><tr><td> 8</td><td> 8</td><td> PRINT</td><td >   </td><td >   </td><td> ~5</td><td> !1</td></tr><tr><td >   </td><td> 9</td><td> FREE</td><td >   </td><td >   </td><td >   </td><td> ~5</td></tr><tr><td> 9</td><td> 10</td><td> JMP</td><td >   </td><td >   </td><td >   </td><td> ->5</td></tr><tr><td >   </td><td> 11</td><td> SWITCH_FREE</td><td >   </td><td >   </td><td >   </td><td> $2</td></tr><tr><td> 10</td><td> 12</td><td> RETURN</td><td >   </td><td >   </td><td >   </td><td> 1</td></tr></table></br><h2>OPCODE :<a name=FREE>FREE</a></h2><h3> PHP source code </h3><textarea style="background-color: #FFFF66" rows=7 cols="130"><?php

* Release the allocated space of the value.

* opcode number: 70

print "Hello World";

* opcode number: 149

* Include the file specified by filename and eval it.

* opcode number: 73

include("test.php");

eval("test.php");

* Allocate a new array with elem-value as the first element of the array. Followed by ADD_ARRAY_ELEMENT.

* opcode number: 71

$a = array(1,2,3);

print_r($a);

?></textarea></br><h3> PHP opcodes </h3>Function name: <b>(null)</b></br>Compiled variables: !0=$a </br><table width="80%" border=1 ><tr><td bgcolor=#9966FF> line</td><td bgcolor=#9966FF> #</td><td bgcolor=#9966FF> op</td><td bgcolor=#9966FF> fetch</td><td bgcolor=#9966FF> ext</td><td bgcolor=#9966FF> return</td><td bgcolor=#9966FF> operands</td></tr><tr><td> 6</td><td> 0</td><td> INIT_ARRAY</td><td >   </td><td >   </td><td> ~0</td><td> 1</td></tr><tr><td >   </td><td> 1</td><td> ADD_ARRAY_ELEMENT</td><td >   </td><td >   </td><td> ~0</td><td> 2</td></tr><tr><td >   </td><td> 2</td><td> ADD_ARRAY_ELEMENT</td><td >   </td><td >   </td><td> ~0</td><td> 3</td></tr><tr><td >   </td><td> 3</td><td> ASSIGN</td><td >   </td><td >   </td><td >   </td><td> !0,~0</td></tr><tr><td> 7</td><td> 4</td><td> SEND_VAR</td><td >   </td><td >   </td><td >   </td><td> !0</td></tr><tr><td >   </td><td> 5</td><td> DO_FCALL</td><td >   </td><td> 1</td><td >   </td><td> 'print_r'</td></tr><tr><td> 8</td><td> 6</td><td> RETURN</td><td >   </td><td >   </td><td >   </td><td> 1</td></tr></table></br><h2>OPCODE :<a name=INIT_FCALL_BY_NAME>INIT_FCALL_BY_NAME</a></h2><h3> PHP source code </h3><textarea style="background-color: #FFFF66" rows=8 cols="130"><?php

* prepare for a function call to function value1

* opcode number: 59

$x = 'phpinfo';

$a = $x();

* Prepare for a method call. Followed by DO_FCALL.

* opcode number: 112

class A {

var $num;

function incrementNum(){

$num++;

}

$obj = new A();

$obj->incrementNum();

?></textarea></br><h3> PHP opcodes </h3>Function name: <b>(null)</b></br>Compiled variables: !0=$obj </br><table width="80%" border=1 ><tr><td bgcolor=#9966FF> line</td><td bgcolor=#9966FF> #</td><td bgcolor=#9966FF> op</td><td bgcolor=#9966FF> fetch</td><td bgcolor=#9966FF> ext</td><td bgcolor=#9966FF> return</td><td bgcolor=#9966FF> operands</td></tr><tr><td> 6</td><td> 0</td><td> NOP</td><td >   </td><td >   </td><td >   </td><td >   </td></tr><tr><td> 13</td><td> 1</td><td> ZEND_FETCH_CLASS</td><td >   </td><td >   </td><td> :1</td><td> 'A'</td></tr><tr><td >   </td><td> 2</td><td> NEW</td><td >   </td><td >   </td><td> $2</td><td> :1</td></tr><tr><td >   </td><td> 3</td><td> DO_FCALL_BY_NAME</td><td >   </td><td> 0</td><td >   </td><td >   </td></tr><tr><td >   </td><td> 4</td><td> ASSIGN</td><td >   </td><td >   </td><td >   </td><td> !0,$2</td></tr><tr><td> 14</td><td> 5</td><td> ZEND_INIT_METHOD_CALL</td><td >   </td><td >   </td><td >   </td><td> !0,'incrementNum'</td></tr><tr><td >   </td><td> 6</td><td> DO_FCALL_BY_NAME</td><td >   </td><td> 0</td><td >   </td><td >   </td></tr><tr><td> 16</td><td> 7</td><td> RETURN</td><td >   </td><td >   </td><td >   </td><td> 1</td></tr></table></br>Function name: <b>incrementNum</b></br>Compiled variables: !0=$num </br><table width="80%" border=1 ><tr><td bgcolor=#9966FF> line</td><td bgcolor=#9966FF> #</td><td bgcolor=#9966FF> op</td><td bgcolor=#9966FF> fetch</td><td bgcolor=#9966FF> ext</td><td bgcolor=#9966FF> return</td><td bgcolor=#9966FF> operands</td></tr><tr><td> 9</td><td> 0</td><td> POST_INC</td><td >   </td><td >   </td><td> ~0</td><td> !0</td></tr><tr>& 10BC8 lt;td >   </td><td> 1</td><td> FREE</td><td >   </td><td >   </td><td >   </td><td> ~0</td></tr><tr><td> 10</td><td> 2</td><td> RETURN</td><td >   </td><td >   </td><td >   </td><td> null</td></tr></table></br><h2>OPCODE :<a name=INIT_STATIC_METHOD_CALL>INIT_STATIC_METHOD_CALL</a></h2><h3> PHP source code </h3><textarea style="background-color: #FFFF66" rows=13 cols="130"><?php

* opcode number: 113

class Foo {

public static function aStaticMethod() {

echo "hello world\n";

}

Foo::aStaticMethod();

* appears to create a string variable in result

* opcode number: 53

echo "hello$a world";

* opcode number: 138

$obj = new A();

if ($obj instanceof A) {

echo 'A';

}

?></textarea></br><h3> PHP opcodes </h3>Function name: <b>(null)</b></br>Compiled variables: !0=$obj </br><table width="80%" border=1 ><tr><td bgcolor=#9966FF> line</td><td bgcolor=#9966FF> #</td><td bgcolor=#9966FF> op</td><td bgcolor=#9966FF> fetch</td><td bgcolor=#9966FF> ext</td><td bgcolor=#9966FF> return</td><td bgcolor=#9966FF> operands</td></tr><tr><td> 6</td><td> 0</td><td> ZEND_FETCH_CLASS</td><td >   </td><td >   </td><td> :0</td><td> 'A'</td></tr><tr><td >   </td><td> 1</td><td> NEW</td><td >   </td><td >   </td><td> $1</td><td> :0</td></tr><tr><td >   </td><td> 2</td><td> DO_FCALL_BY_NAME</td><td >   </td><td> 0</td><td >   </td><td >   </td></tr><tr><td >   </td><td> 3</td><td> ASSIGN</td><td >   </td><td >   </td><td >   </td><td> !0,$1</td></tr><tr><td> 8</td><td> 4</td><td> ZEND_FETCH_CLASS</td><td >   </td><td >   </td><td> :4</td><td> 'A'</td></tr><tr><td >   </td><td> 5</td><td> ZEND_INSTANCEOF</td><td >   </td><td >   </td><td> ~5</td><td> !0,$4</td></tr><tr><td >   </td><td> 6</td><td> JMPZ</td><td >   </td><td >   </td><td >   </td><td> ~5,->9</td></tr><tr><td> 9</td><td> 7</td><td> ECHO</td><td >   </td><td >   </td><td >   </td><td> 'A'</td></tr><tr><td> 10</td><td> 8</td><td> JMP</td><td >   </td><td >   </td><td >   </td><td> ->9</td></tr><tr><td> 11</td><td> 9</td><td> RETURN</td><td >   </td><td >   </td><td >   </td><td> 1</td></tr></table></br><h2>OPCODE :<a name=ISSET_ISEMPTY_DIM_OBJ>ISSET_ISEMPTY_DIM_OBJ</a></h2><h3> PHP source code </h3><textarea style="background-color: #FFFF66" rows=7 cols="130"><?php

* Tests if the entry of an array is set or not.

* opcode number: 115

if(isset($a[0])) return 0;

* opcode number: 148

$obj = new A();

if(empty($obj->num)) return 0;

?></textarea></br><h3> PHP opcodes </h3>Function name: <b>(null)</b></br>Compiled variables: !0=$obj </br><table width="80%" border=1 ><tr><td bgcolor=#9966FF> line</td><td bgcolor=#9966FF> #</td><td bgcolor=#9966FF> op</td><td bgcolor=#9966FF> fetch</td><td bgcolor=#9966FF> ext</td><td bgcolor=#9966FF> return</td><td bgcolor=#9966FF> operands</td></tr><tr><td> 6</td><td> 0</td><td> ZEND_FETCH_CLASS</td><td >   </td><td >   </td><td> :0</td><td> 'A'</td></tr><tr><td >   </td><td> 1</td><td> NEW</td><td >   </td><td >   </td><td> $1</td><td> :0</td></tr><tr><td >   </td><td> 2</td><td> DO_FCALL_BY_NAME</td><td >   </td><td> 0</td><td >   </td><td >   </td></tr><tr><td >   </td><td> 3</td><td> ASSIGN</td><td >   </td><td >   </td><td >   </td><td> !0,$1</td></tr><tr><td> 7</td><td> 4</td><td> ZEND_ISSET_ISEMPTY_PROP_OBJ</td><td >   </td><td >   </td><td> ~4</td><td> !0,'num'</td></tr><tr><td >   </td><td> 5</td><td> JMPZ</td><td >   </td><td >   </td><td >   </td><td> ~4,->8</td></tr><tr><td >   </td><td> 6</td><td> RETURN</td><td >   </td><td >   </td><td >   </td><td> 0</td></tr><tr><td >   </td><td> 7</td><td> JMP</td><td >   </td><td >   </td><td >   </td><td> ->8</td></tr><tr><td> 8</td><td> 8</td><td> RETURN</td><td >   </td><td >   </td><td >   </td><td> 1</td></tr></table></br><h2>OPCODE :<a name=ISSET_ISEMPTY_VAR>ISSET_ISEMPTY_VAR</a></h2><h3> PHP source code </h3><textarea style="background-color: #FFFF66" rows=7 cols="130"><?php

* Tests if the value of a variable is set or not.

* opcode number: 114

if(isset($a)){ return 0;}

* compares if value1 and value2 are equal

* opcode number: 17

echo (1 == 1);

echo (1 == 'c');

* Compares value1 and value2 to see if they are equal AND have the same type

* opcode number: 15

echo (1===1);

echo (1==='a');

* compares if value1 and value2 are not equal

* opcode number: 18

echo (1 != 1);

* compares value1 and value2 to see if they are unequal or of different types

* opcode number: 16

echo (1 !== 1);

* compares if value1 is less than value2

* opcode number: 19

echo (1 < 2);

* compares if value1 is less than or equal to value2

* opcode number: 20

echo (1 >= 2);

* Jump to the address if the value is not zero

* opcode number: 44

for($i=0; $i<3; $i++){

echo "hi";

}

* Jump to the address if the xor of value1 and value2 is zero .. ???

* opcode number: 47

if(1^2) return;

* Jump to the address if the value is zero

* opcode number: 43

if($a != 0) echo "foo";

* Jump to the address if the value is .. ???

* opcode number: 45

for($i=0; $i<3; $i++){

echo "hi";

}

* Jump to the address if the xor of value1 and value2 is zero .. ???

* opcode number: 46

* Makes the value of "result" congruent to "value1" modulo "value2".

* opcode number: 5

echo 6 % 3;

* Multiplys "value1" by "value2" and stores the result into "result".

* opcode number: 3

echo 2*3;

* Construct an instance of "type" and store the reference to the object into "result".

* opcode number: 68

$obj = new A();

* no operation

* opcode number: 0

function A(){};

* decrements variable indicated by value1 by 1 (after performing other operations) and stores in result

* opcode number: 37

$a--;

* opcode number: 135

$obj = new A();

$obj->num--;

* increments variable indicated by value1 by 1 (after performing other operations) and stores in result

* opcode number: 36

$a++;

* Increment the property value specified by prop-name and store the original value into result.

* opcode number: 134

$obj = new A();

$obj->num++;

* decrements variable indicated by value1 by 1 (before performing other operations) and stores in results

* opcode number: 35

--$a;

* opcode number: 133

$obj = new A();

--$obj->num;

* increments variable indicated by value1 by 1 (before performing other operations) and stores in result

* opcode number: 34

++$a;

* opcode number: 132

$obj = new A();

++$obj->num;

* opcode number: 41

print "Hello World";

* Question Mark Assign, used twice inside a question mark assign to temporarily assign result as value1 (this is followed up with an ASSIGN bytecode)

* opcode number: 22

function A(){

echo 1?2:3;

}

function B(){

$b = 0;

$a = $b > 1 ? 10: 11;

}

?></textarea></br><h3> PHP opcodes </h3>Function name: <b>(null)</b></br>Compiled variables: none </br><table width="80%" border=1 ><tr><td bgcolor=#9966FF> line</td><td bgcolor=#9966FF> #</td><td bgcolor=#9966FF> op</td><td bgcolor=#9966FF> fetch</td><td bgcolor=#9966FF> ext</td><td bgcolor=#9966FF> return</td><td bgcolor=#9966FF> operands</td></tr><tr><td> 6</td><td> 0</td><td> NOP</td><td >   </td><td >   </td><td >   </td><td >   </td></tr><tr><td> 10</td><td> 1</td><td> NOP</td><td >   </td><td >   </td><td >   </td><td >   </td></tr><tr><td> 14</td><td> 2</td><td> RETURN</td><td >   </td><td >   </td><td >   </td><td> 1</td></tr></table></br>Function name: <b>A</b></br>Compiled variables: none </br><table width="80%" border=1 ><tr><td bgcolor=#9966FF> line</td><td bgcolor=#9966FF> #</td><td bgcolor=#9966FF> op</td><td bgcolor=#9966FF> fetch</td><td bgcolor=#9966FF> ext</td><td bgcolor=#9966FF> return</td><td bgcolor=#9966FF> operands</td></tr><tr><td> 7</td><td> 0</td><td> JMPZ</td><td >   </td><td >   </td><td >   </td><td> 1,->3</td></tr><tr><td >   </td><td> 1</td><td> QM_ASSIGN</td><td >   </td><td >   </td><td> ~0</td><td> 2</td></tr><tr><td >   </td><td> 2</td><td> JMP</td><td >   </td><td >   </td><td >   </td><td> ->4</td></tr><tr><td >   </td><td> 3</td><td> QM_ASSIGN</td><td >   </td><td >   </td><td> ~0</td><td> 3</td></tr><tr><td >   </td><td> 4</td><td> ECHO</td><td >   </td><td >   </td><td >   </td><td> ~0</td></tr><tr><td> 8</td><td> 5</td><td> RETURN</td><td >   </td><td >   </td><td >   </td><td> null</td></tr></table></br>Function name: <b>B</b></br>Compiled variables: !0=$b, !1=$a </br><table width="80%" border=1 ><tr><td bgcolor=#9966FF> line</td><td bgcolor=#9966FF> #</td><td bgcolor=#9966FF> op</td><td bgcolor=#9966FF> fetch</td><td bgcolor=#9966FF> ext</td><td bgcolor=#9966FF> return</td><td bgcolor=#9966FF> operands</td></tr><tr><td> 11</td><td> 0</td><td> ASSIGN</td><td >   </td><td >   </td><td >   </td><td> !0,0</td></tr><tr><td> 12</td><td> 1</td><td> IS_SMALLER</td><td >   </td><td >   </td><td> ~1</td><td> 1,!0</td></tr><tr><td >   </td><td> 2</td><td> JMPZ</td><td >   </td><td >   </td><td >   </td><td> ~1,->5</td></tr><tr><td >   </td><td> 3</td><td> QM_ASSIGN</td><td >   </td><td >   </td><td> ~2</td><td> 10</td></tr><tr><td >   </td><td> 4</td><td> JMP</td><td >   </td><td >   </td><td >   </td><td> ->6</td></tr><tr><td >   </td><td> 5</td><td> QM_ASSIGN</td><td >   </td><td >   </td><td> ~2</td><td> 11</td></tr><tr><td >   </td><td> 6</td><td> ASSIGN</td><td >   </td><td >   </td><td >   </td><td> !1,~2</td></tr><tr><td> 13</td><td> 7</td><td> RETURN</td><td >   </td><td >   </td><td >   </td><td> null</td></tr></table></br><h2>OPCODE :<a name=RAISE_ABSTRACT_ERROR>RAISE_ABSTRACT_ERROR</a></h2><h3> PHP source code </h3><textarea style="background-color: #FFFF66" rows=24 cols="130"><?php

* opcode number: 142

abstract class fail {

abstract function show();

}

class pass extends fail {

function show() {

echo "Call to function show()\n";

}

$t2 = new pass();

$t2->show();

$t = new fail();

$t->show();

echo "Done\n"; // shouldn't be displayed

?></textarea></br><h3> PHP opcodes </h3>Function name: <b>(null)</b></br>Compiled variables: !0=$t2, !1=$t </br><table width="80%" border=1 ><tr><td bgcolor=#9966FF> line</td><td bgcolor=#9966FF> #</td><td bgcolor=#9966FF> op</td><td bgcolor=#9966FF> fetch</td><td bgcolor=#9966FF> ext</td><td bgcolor=#9966FF> return</td><td bgcolor=#9966FF> operands</td></tr><tr><td> 7</td><td> 0</td><td> NOP</td><td >   </td><td >   </td><td >   </td><td >   </td></tr><tr><td> 11</td><td> 1</td><td> NOP</td><td >   </td><td >   </td><td >   </td><td >   </td></tr><tr><td >   </td><td> 2</td><td> NOP</td><td >   </td><td >   </td><td >   </td><td >   </td></tr><tr><td> 17</td><td> 3</td><td> ZEND_FETCH_CLASS</td><td >   </td><td >   </td><td> :3</td><td> 'pass'</td></tr><tr><td >   </td><td> 4</td><td> NEW</td><td >   </td><td >   </td><td> $4</td><td> :3</td></tr><tr><td >   </td><td> 5</td><td> DO_FCALL_BY_NAME</td><td >   </td><td> 0</td><td >   </td><td >   </td></tr><tr><td >   </td><td> 6</td><td> ASSIGN</td><td >   </td><td >   </td><td >   </td><td> !0,$4</td></tr><tr><td> 18</td><td> 7</td><td> ZEND_INIT_METHOD_CALL</td><td >   </td><td >   </td><td >   </td><td> !0,'show'</td></tr><tr><td >   </td><td> 8</td><td> DO_FCALL_BY_NAME</td><td >   </td><td> 0</td><td >   </td><td >   </td></tr><tr><td> 20</td><td> 9</td><td> ZEND_FETCH_CLASS</td><td >   </td><td >   </td><td> :9</td><td> 'fail'</td></tr><tr><td >   </td><td> 10</td><td> NEW</td><td >   </td><td >   </td><td> $10</td><td> :9</td></tr><tr><td >   </td><td> 11</td><td> DO_FCALL_BY_NAME</td><td >   </td><td> 0</td><td >   </td><td >   </td></tr><tr><td >   </td><td> 12</td><td> ASSIGN</td><td >   </td><td >   </td><td >   </td><td> !1,$10</td></tr><tr><td> 21</td><td> 13</td><td> ZEND_INIT_METHOD_CALL</td><td >   </td><td >   </td><td >   </td><td> !1,'show'</td></tr><tr><td >   </td><td> 14</td><td> DO_FCALL_BY_NAME</td><td >   </td><td> 0</td><td >   </td><td >   </td></tr><tr><td> 23</td><td> 15</td><td> ECHO</td><td >   </td><td >   </td><td >   </td><td> 'Done%0A'</td></tr><tr><td> 24</td><td> 16</td><td> RETURN</td><td >   </td><td >   </td><td >   </td><td> 1</td></tr></table></br>Function name: <b>show</b></br>Compiled variables: none </br><table width="80%" border=1 ><tr><td bgcolor=#9966FF> line</td><td bgcolor=#9966FF> #</td><td bgcolor=#9966FF> op</td><td bgcolor=#9966FF> fetch</td><td bgcolor=#9966FF> ext</td><td bgcolor=#9966FF> return</td><td bgcolor=#9966FF> operands</td></tr><tr><td> 8</td><td> 0</td><td> ZEND_RAISE_ABSTRACT_ERROR</td><td >   </td><td >   </td><td >   </td><td >   </td></tr><tr><td >   </td><td> 1</td><td> RETURN</td><td >   </td><td >   </td><td >   </td><td> null</td></tr></table></br>Function name: <b>show</b></br>Compiled variables: none </br><table width="80%" border=1 ><tr><td bgcolor=#9966FF> line</td><td bgcolor=#9966FF> #</td><td bgcolor=#9966FF> op</td><td bgcolor=#9966FF> fetch</td><td bgcolor=#9966FF> ext</td><td bgcolor=#9966FF> return</td><td bgcolor=#9966FF> operands</td></tr><tr><td> 13</td><td> 0</td><td> ECHO</td><td >   </td><td >   </td><td >   </td><td> 'Call+to+function+show%28%29%0A'</td></tr><tr><td> 14</td><td> 1</td><td> RETURN</td><td >   </td><td >   </td><td >   </td><td> null</td></tr></table></br><h2>OPCODE :<a name=RECV>RECV</a></h2><h3> PHP source code </h3><textarea style="background-color: #FFFF66" rows=7 cols="130"><?php

* Receive a functoin argument of "argument-number" and store the argument value into a variable of "argument-number". (e.g. $1 for 1)

* opcode number: 63

function hello($a){}

* Initialize a function argument with "value" if not received from caller. Otherwise same as RECV.

* opcode number: 64

function hello($a=5){}

* Return value from a funciton.

* opcode number: 62

return 1;

* Pass the reference value as an actual parameter to a function. DO_FCALL follows.

* opcode number: 67

@each($input);

* Pass the constant value as an actual parameter to a function. DO_FCALL follows.

* opcode number: 65

function funcA($msg){

print $msg;

}

funcA('HELLO');

defined('IN_PHPBB');

* Pass the variable value as an actual parameter to a function. DO_FCALL follows.

* opcode number: 66

$a = array(1,2,3);

if(is_array($a)){ return 0; }

?></textarea></br><h3> PHP opcodes </h3>Function name: <b>(null)</b></br>Compiled variables: !0=$a </br><table width="80%" border=1 ><tr><td bgcolor=#9966FF> line</td><td bgcolor=#9966FF> #</td><td bgcolor=#9966FF> op</td><td bgcolor=#9966FF> fetch</td><td bgcolor=#9966FF> ext</td><td bgcolor=#9966FF> return</td><td bgcolor=#9966FF> operands</td></tr><tr><td> 6</td><td> 0</td><td> INIT_ARRAY</td><td >   </td><td >   </td><td> ~0</td><td> 1</td></tr><tr><td >   </td><td> 1</td><td> ADD_ARRAY_ELEMENT</td><td >   </td><td >   </td><td> ~0</td><td> 2</td></tr><tr><td >   </td><td> 2</td><td> ADD_ARRAY_ELEMENT</td><td >   </td><td >   </td><td> ~0</td><td> 3</td></tr><tr><td >   </td><td> 3</td><td> ASSIGN</td><td >   </td><td >   </td><td >   </td><td> !0,~0</td></tr><tr><td> 7</td><td> 4</td><td> SEND_VAR</td><td >   </td><td >   </td><td >   </td><td> !0</td></tr><tr><td >   </td><td> 5</td><td> DO_FCALL</td><td >   </td><td> 1</td><td >   </td><td> 'is_array'</td></tr><tr><td >   </td><td> 6</td><td> JMPZ</td><td >   </td><td >   </td><td >   </td><td> $2,->9</td></tr><tr><td >   </td><td> 7</td><td> RETURN</td><td >   </td><td >   </td><td >   </td><td> 0</td></tr><tr><td >   </td><td> 8</td><td> JMP</td><td >   </td><td >   </td><td >   </td><td> ->9</td></tr><tr><td> 8</td><td> 9</td><td> RETURN</td><td >   </td><td >   </td><td >   </td><td> 1</td></tr></table></br><h2>OPCODE :<a name=SEND_VAR_NO_REF>SEND_VAR_NO_REF</a></h2><h3> PHP source code </h3><textarea style="background-color: #FFFF66" rows=6 cols="130"><?php

* opcode number: 106

* No sample PHP yet */

?></textarea></br><h3> PHP opcodes </h3><h2>OPCODE :<a name=SL>SL</a></h2><h3> PHP source code </h3><textarea style="background-color: #FFFF66" rows=7 cols="130"><?php

* Shift value1 by balue2 bits to left

* opcode number: 6

echo 8 << 2;

* Shift bits to right

* opcode number: 7

echo 8 >> 2;

* Subtracts "value2" from "value1" and stores the result into "result".

* opcode number: 2

echo 1-2;

* Release the allocated space of "value"?

* opcode number: 49

$a = array(1,2,3);

foreach($a as $num){

print $num;

}

?></textarea></br><h3> PHP opcodes </h3>Function name: <b>(null)</b></br>Compiled variables: !0=$a, !1=$num </br><table width="80%" border=1 ><tr><td bgcolor=#9966FF> line</td><td bgcolor=#9966FF> #</td><td bgcolor=#9966FF> op</td><td bgcolor=#9966FF> fetch</td><td bgcolor=#9966FF> ext</td><td bgcolor=#9966FF> return</td><td bgcolor=#9966FF> operands</td></tr><tr><td> 6</td><td> 0</td><td> INIT_ARRAY</td><td >   </td><td >   </td><td> ~0</td><td> 1</td></tr><tr><td >   </td><td> 1</td><td> ADD_ARRAY_ELEMENT</td><td >   </td><td >   </td><td> ~0</td><td> 2</td></tr><tr><td >   </td><td> 2</td><td> ADD_ARRAY_ELEMENT</td><td >   </td><td >   </td><td> ~0</td><td> 3</td></tr><tr><td >   </td><td> 3</td><td> ASSIGN</td><td >   </td><td >   </td><td >   </td><td> !0,~0</td></tr><tr><td> 7</td><td> 4</td><td> FE_RESET</td><td >   </td><td >   </td><td> $2</td><td> !0,->11</td></tr><tr><td >   </td><td> 5</td><td> FE_FETCH</td><td >   </td><td >   </td><td> $3</td><td> $2,->11</td></tr><tr><td >   </td><td> 6</td><td> ZEND_OP_DATA</td><td >   </td><td >   </td><td >   </td><td >   </td></tr><tr><td >   </td><td> 7</td><td> ASSIGN</td><td >   </td><td >   </td><td >   </td><td> !1,$3</td></tr><tr><td> 8</td><td> 8</td><td> PRINT</td><td >   </td><td >   </td><td> ~5</td><td> !1</td></tr><tr><td >   </td><td> 9</td><td> FREE</td><td >   </td><td >   </td><td >   </td><td> ~5</td></tr><tr><td> 9</td><td> 10</td><td> JMP</td><td >   </td><td >   </td><td >   </td><td> ->5</td></tr><tr><td >   </td><td> 11</td><td> SWITCH_FREE</td><td >   </td><td >   </td><td >   </td><td> $2</td></tr><tr><td> 10</td><td> 12</td><td> RETURN</td><td >   </td><td >   </td><td >   </td><td> 1</td></tr></table></br><h2>OPCODE :<a name=THROW>THROW</a></h2><h3> PHP source code </h3><textarea style="background-color: #FFFF66" rows=19 cols="130"><?php

* opcode number: 108

try {

$error = 'Always throw this error';

throw new Exception($error);

// Code following an exception is not executed.

echo 'Never executed';

} catch (Exception $e) {

echo 'Caught exception: ', $e->getMessage(), "\n";

}

// Continue execution

echo 'Hello World';

?></textarea></br><h3> PHP opcodes </h3>Function name: <b>(null)</b></br>Compiled variables: !0=$error, !1=$e </br><table width="80%" border=1 ><tr><td bgcolor=#9966FF> line</td><td bgcolor=#9966FF> #</td><td bgcolor=#9966FF> op</td><td bgcolor=#9966FF> fetch</td><td bgcolor=#9966FF> ext</td><td bgcolor=#9966FF> return</td><td bgcolor=#9966FF> operands</td></tr><tr><td> 7</td><td> 0</td><td> ASSIGN</td><td >   </td><td >   </td><td >   </td><td> !0,'Always+throw+this+error'</td></tr><tr><td> 8</td><td> 1</td><td> ZEND_FETCH_CLASS</td><td >   </td><td >   </td><td> :1</td><td> 'Exception'</td></tr><tr><td >   </td><td> 2</td><td> NEW</td><td >   </td><td >   </td><td> $2</td><td> :1</td></tr><tr><td >   </td><td> 3</td><td> SEND_VAR</td><td >   </td><td >   </td><td >   </td><td> !0</td></tr><tr><td >   </td><td> 4</td><td> DO_FCALL_BY_NAME</td><td >   </td><td> 1</td><td >   </td><td >   </td></tr><tr><td >   </td><td> 5</td><td> ZEND_THROW</td><td >   </td><td> 0</td><td >   </td><td> $2</td></tr><tr><td> 11</td><td> 6</td><td> ECHO</td><td >   </td><td >   </td><td >   </td><td> 'Never+executed'</td></tr><tr><td> 13</td><td> 7</td><td> JMP</td><td >   </td><td >   </td><td >   </td><td> ->15</td></tr><tr><td >   </td><td> 8</td><td> ZEND_FETCH_CLASS</td><td >   </td><td >   </td><td> :4</td><td> 'Exception'</td></tr><tr><td >   </td><td> 9</td><td> ZEND_CATCH</td><td >   </td><td> 15</td><td >   </td><td> $4,!1</td></tr><tr><td> 14</td><td> 10</td><td> ECHO</td><td >   </td><td >   </td><td >   </td><td> 'Caught+exception%3A+'</td></tr><tr><td >   </td><td> 11</td><td> ZEND_INIT_METHOD_CALL</td><td >   </td><td >   </td><td >   </td><td> !1,'getMessage'</td></tr><tr><td >   </td><td> 12</td><td> DO_FCALL_BY_NAME</td><td >   </td><td> 0</td><td >   </td><td >   </td></tr><tr><td >   </td><td> 13</td><td> ECHO</td><td >   </td><td >   </td><td >   </td><td> $6</td></tr><tr><td >   </td><td> 14</td><td> ECHO</td><td >   </td><td >   </td><td >   </td><td> '%0A'</td></tr><tr><td> 18</td><td> 15</td><td> ECHO</td><td >   </td><td >   </td><td >   </td><td> 'Hello+World'</td></tr><tr><td> 19</td><td> 16</td><td> RETURN</td><td >   </td><td >   </td><td >   </td><td> 1</td></tr></table></br><h2>OPCODE :<a name=TICKS>TICKS</a></h2><h3> PHP source code </h3><textarea style="background-color: #FFFF66" rows=24 cols="130"><?php

* opcode number: 105

// A function that records the time when it is called

function profile()

{

echo "profile function is called\n";

}

// Set up a tick handler

register_tick_function("profile");

// Initialize the function before the declare block

profile();

// Run a block of code, throw a tick every 2nd statement

declare(ticks=2) {

for ($x = 0; $x < 10; ++$x) {

echo "hello world\n";

}

?></textarea></br><h3> PHP opcodes </h3>Function name: <b>(null)</b></br>Compiled variables: !0=$x </br><table width="80%" border=1 ><tr><td bgcolor=#9966FF> line</td><td bgcolor=#9966FF> #</td><td bgcolor=#9966FF> op</td><td bgcolor=#9966FF> fetch</td><td bgcolor=#9966FF> ext</td><td bgcolor=#9966FF> return</td><td bgcolor=#9966FF> operands</td></tr><tr><td> 7</td><td> 0</td><td> NOP</td><td >   </td><td >   </td><td >   </td><td >   </td></tr><tr><td> 13</td><td> 1</td><td> SEND_VAL</td><td >   </td><td >   </td><td >   </td><td> 'profile'</td></tr><tr><td >   </td><td> 2</td><td> DO_FCALL</td><td >   </td><td> 1</td><td >   </td><td> 'register_tick_function'</td></tr><tr><td> 16</td><td> 3</td><td> DO_FCALL</td><td >   </td><td> 0</td><td >   </td><td> 'profile'</td></tr><tr><td> 20</td><td> 4</td><td> ASSIGN</td><td >   </td><td >   </td><td >   </td><td> !0,0</td></tr><tr><td >   </td><td> 5</td><td> IS_SMALLER</td><td >   </td><td >   </td><td> ~3</td><td> !0,10</td></tr><tr><td >   </td><td> 6</td><td> JMPZNZ</td><td >   </td><td> 9</td><td >   </td><td> ~3,->13</td></tr><tr><td >   </td><td> 7</td><td> PRE_INC</td><td >   </td><td >   </td><td >   </td><td> !0</td></tr><tr><td >   </td><td> 8</td><td> JMP</td><td >   </td><td >   </td><td >   </td><td> ->5</td></tr><tr><td> 21</td><td> 9</td><td> ECHO</td><td >   </td><td >   </td><td >   </td><td> 'hello+world%0A'</td></tr><tr><td >   </td><td> 10</td><td> TICKS</td><td >   </td><td >   </td><td >   </td><td> 2</td></tr><tr><td> 22</td><td> 11</td><td> TICKS</td><td >   </td><td >   </td><td >   </td><td> 2</td></tr><tr><td >   </td><td> 12</td><td> JMP</td><td >   </td><td >   </td><td >   </td><td> ->7</td></tr><tr><td >   </td><td> 13</td><td> TICKS</td><td >   </td><td >   </td><td >   </td><td> 2</td></tr><tr><td> 23</td><td> 14</td><td> TICKS</td><td >   </td><td >   </td><td >   </td><td> 2</td></tr><tr><td> 24</td><td> 15</td><td> RETURN</td><td >   </td><td >   </td><td >   </td><td> 1</td></tr></table></br>Function name: <b>profile</b></br>Compiled variables: none </br><table width="80%" border=1 ><tr><td bgcolor=#9966FF> line</td><td bgcolor=#9966FF> #</td><td bgcolor=#9966FF> op</td><td bgcolor=#9966FF> fetch</td><td bgcolor=#9966FF> ext</td><td bgcolor=#9966FF> return</td><td bgcolor=#9966FF> operands</td></tr><tr><td> 9</td><td> 0</td><td> ECHO</td><td >   </td><td >   </td><td >   </td><td> 'profile+function+is+called%0A'</td></tr><tr><td> 10</td><td> 1</td><td> RETURN</td><td >   </td><td >   </td><td >   </td><td> null</td></tr></table></br><h2>OPCODE :<a name=UNSET_DIM>UNSET_DIM</a></h2><h3> PHP source code </h3><textarea style="background-color: #FFFF66" rows=8 cols="130"><?php

* Unset the entry of array-value, which is specified by index, and store the original element value into "result".

* opcode number: 75

$a = array(1,2,3);

unset($a[0]);

?></textarea></br><h3> PHP opcodes </h3>Function name: <b>(null)</b></br>Compiled variables: !0=$a </br><table width="80%" border=1 ><tr><td bgcolor=#9966FF> line</td><td bgcolor=#9966FF> #</td><td bgcolor=#9966FF> op</td><td bgcolor=#9966FF> fetch</td><td bgcolor=#9966FF> ext</td><td bgcolor=#9966FF> return</td><td bgcolor=#9966FF> operands</td></tr><tr><td> 6</td><td> 0</td><td> INIT_ARRAY</td><td >   </td><td >   </td><td> ~0</td><td> 1</td></tr><tr><td >   </td><td> 1</td><td> ADD_ARRAY_ELEMENT</td><td >   </td><td >   </td><td> ~0</td><td> 2</td></tr><tr><td >   </td><td> 2</td><td> ADD_ARRAY_ELEMENT</td><td >   </td><td >   </td><td> ~0</td><td> 3</td></tr><tr><td >   </td><td> 3</td><td> ASSIGN</td><td >   </td><td >   </td><td >   </td><td> !0,~0</td></tr><tr><td> 7</td><td> 4</td><td> UNSET_DIM</td><td >   </td><td >   </td><td> $2</td><td> !0,0</td></tr><tr><td> 8</td><td> 5</td><td> RETURN</td><td >   </td><td >   </td><td >   </td><td> 1</td></tr></table></br><h2>OPCODE :<a name=UNSET_OBJ>UNSET_OBJ</a></h2><h3> PHP source code </h3><textarea style="background-color: #FFFF66" rows=8 cols="130"><?php

* Unset the property of the current object (this) and store the original value into "result".

* opcode number: 76

$obj = new A();

unset($obj->num);

* Unset the variable and store the original value into "result".

* opcode number: 74

$x = 1;

$a='x';

unset($$a);

* opcode number: 150

* No sample PHP yet */

?></textarea></br><h3> PHP opcodes </h3><h2>OPCODE :<a name=VERIFY_ABSTRACT_CLASS>VERIFY_ABSTRACT_CLASS</a></h2><h3> PHP source code </h3><textarea style="background-color: #FFFF66" rows=6 cols="130"><?php

* opcode number: 146

* No sample PHP yet */

?></textarea></br><h3> PHP opcodes </h3></body>

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