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1702 lines (1544 loc) · 86 KB
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<?php
/**
* UTF8 helper functions
*
* @license LGPL 2.1 (http://www.gnu.org/copyleft/lesser.html)
* @author Andreas Gohr <andi@splitbrain.org>
*/
/**
* check for mb_string support
*/
if(!defined('UTF8_MBSTRING')){
if(function_exists('mb_substr') && !defined('UTF8_NOMBSTRING')){
define('UTF8_MBSTRING',1);
}else{
define('UTF8_MBSTRING',0);
}
}
/**
* Check if PREG was compiled with UTF-8 support
*
* Without this many of the functions below will not work, so this is a minimal requirement
*/
if(!defined('UTF8_PREGSUPPORT')){
define('UTF8_PREGSUPPORT', (bool) @preg_match('/^.$/u', 'ñ'));
}
/**
* Check if PREG was compiled with Unicode Property support
*
* This is not required for the functions below, but might be needed in a UTF-8 aware application
*/
if(!defined('UTF8_PROPERTYSUPPORT')){
define('UTF8_PROPERTYSUPPORT', (bool) @preg_match('/^\pL$/u', 'ñ'));
}
if(UTF8_MBSTRING){ mb_internal_encoding('UTF-8'); }
if(!function_exists('utf8_isASCII')){
/**
* Checks if a string contains 7bit ASCII only
*
* @author Andreas Haerter <andreas.haerter@dev.mail-node.com>
*/
function utf8_isASCII($str){
return (preg_match('/(?:[^\x00-\x7F])/', $str) !== 1);
}
}
if(!function_exists('utf8_strip')){
/**
* Strips all highbyte chars
*
* Returns a pure ASCII7 string
*
* @author Andreas Gohr <andi@splitbrain.org>
*/
function utf8_strip($str){
$ascii = '';
$len = strlen($str);
for($i=0; $i<$len; $i++){
if(ord($str{$i}) <128){
$ascii .= $str{$i};
}
}
return $ascii;
}
}
if(!function_exists('utf8_check')){
/**
* Tries to detect if a string is in Unicode encoding
*
* @author <bmorel@ssi.fr>
* @link http://www.php.net/manual/en/function.utf8-encode.php
*/
function utf8_check($Str) {
$len = strlen($Str);
for ($i=0; $i<$len; $i++) {
$b = ord($Str[$i]);
if ($b < 0x80) continue; # 0bbbbbbb
elseif (($b & 0xE0) == 0xC0) $n=1; # 110bbbbb
elseif (($b & 0xF0) == 0xE0) $n=2; # 1110bbbb
elseif (($b & 0xF8) == 0xF0) $n=3; # 11110bbb
elseif (($b & 0xFC) == 0xF8) $n=4; # 111110bb
elseif (($b & 0xFE) == 0xFC) $n=5; # 1111110b
else return false; # Does not match any model
for ($j=0; $j<$n; $j++) { # n bytes matching 10bbbbbb follow ?
if ((++$i == $len) || ((ord($Str[$i]) & 0xC0) != 0x80))
return false;
}
}
return true;
}
}
if(!function_exists('utf8_basename')){
/**
* A locale independent basename() implementation
*
* works around a bug in PHP's basename() implementation
*
* @see basename()
* @link https://bugs.php.net/bug.php?id=37738
* @param string $path A path
* @param string $suffix If the name component ends in suffix this will also be cut off
* @return string
*/
function utf8_basename($path, $suffix=''){
$path = trim($path,'\\/');
$rpos = max(strrpos($path, '/'), strrpos($path, '\\'));
if($rpos) $path = substr($path, $rpos+1);
$suflen = strlen($suffix);
if($suflen && (substr($path, -$suflen) == $suffix)){
$path = substr($path, 0, -$suflen);
}
return $path;
}
}
if(!function_exists('utf8_strlen')){
/**
* Unicode aware replacement for strlen()
*
* utf8_decode() converts characters that are not in ISO-8859-1
* to '?', which, for the purpose of counting, is alright - It's
* even faster than mb_strlen.
*
* @author <chernyshevsky at hotmail dot com>
* @see strlen()
* @see utf8_decode()
*/
function utf8_strlen($string){
return strlen(utf8_decode($string));
}
}
if(!function_exists('utf8_substr')){
/**
* UTF-8 aware alternative to substr
*
* Return part of a string given character offset (and optionally length)
*
* @author Harry Fuecks <hfuecks@gmail.com>
* @author Chris Smith <chris@jalakai.co.uk>
* @param string $str
* @param int $offset number of UTF-8 characters offset (from left)
* @param int $length (optional) length in UTF-8 characters from offset
* @return mixed string or false if failure
*/
function utf8_substr($str, $offset, $length = null) {
if(UTF8_MBSTRING){
if( $length === null ){
return mb_substr($str, $offset);
}else{
return mb_substr($str, $offset, $length);
}
}
/*
* Notes:
*
* no mb string support, so we'll use pcre regex's with 'u' flag
* pcre only supports repetitions of less than 65536, in order to accept up to MAXINT values for
* offset and length, we'll repeat a group of 65535 characters when needed (ok, up to MAXINT-65536)
*
* substr documentation states false can be returned in some cases (e.g. offset > string length)
* mb_substr never returns false, it will return an empty string instead.
*
* calculating the number of characters in the string is a relatively expensive operation, so
* we only carry it out when necessary. It isn't necessary for +ve offsets and no specified length
*/
// cast parameters to appropriate types to avoid multiple notices/warnings
$str = (string)$str; // generates E_NOTICE for PHP4 objects, but not PHP5 objects
$offset = (int)$offset;
if (!is_null($length)) $length = (int)$length;
// handle trivial cases
if ($length === 0) return '';
if ($offset < 0 && $length < 0 && $length < $offset) return '';
$offset_pattern = '';
$length_pattern = '';
// normalise -ve offsets (we could use a tail anchored pattern, but they are horribly slow!)
if ($offset < 0) {
$strlen = strlen(utf8_decode($str)); // see notes
$offset = $strlen + $offset;
if ($offset < 0) $offset = 0;
}
// establish a pattern for offset, a non-captured group equal in length to offset
if ($offset > 0) {
$Ox = (int)($offset/65535);
$Oy = $offset%65535;
if ($Ox) $offset_pattern = '(?:.{65535}){'.$Ox.'}';
$offset_pattern = '^(?:'.$offset_pattern.'.{'.$Oy.'})';
} else {
$offset_pattern = '^'; // offset == 0; just anchor the pattern
}
// establish a pattern for length
if (is_null($length)) {
$length_pattern = '(.*)$'; // the rest of the string
} else {
if (!isset($strlen)) $strlen = strlen(utf8_decode($str)); // see notes
if ($offset > $strlen) return ''; // another trivial case
if ($length > 0) {
$length = min($strlen-$offset, $length); // reduce any length that would go passed the end of the string
$Lx = (int)($length/65535);
$Ly = $length%65535;
// +ve length requires ... a captured group of length characters
if ($Lx) $length_pattern = '(?:.{65535}){'.$Lx.'}';
$length_pattern = '('.$length_pattern.'.{'.$Ly.'})';
} else if ($length < 0) {
if ($length < ($offset - $strlen)) return '';
$Lx = (int)((-$length)/65535);
$Ly = (-$length)%65535;
// -ve length requires ... capture everything except a group of -length characters
// anchored at the tail-end of the string
if ($Lx) $length_pattern = '(?:.{65535}){'.$Lx.'}';
$length_pattern = '(.*)(?:'.$length_pattern.'.{'.$Ly.'})$';
}
}
if (!preg_match('#'.$offset_pattern.$length_pattern.'#us',$str,$match)) return '';
return $match[1];
}
}
if(!function_exists('utf8_substr_replace')){
/**
* Unicode aware replacement for substr_replace()
*
* @author Andreas Gohr <andi@splitbrain.org>
* @see substr_replace()
*/
function utf8_substr_replace($string, $replacement, $start , $length=0 ){
$ret = '';
if($start>0) $ret .= utf8_substr($string, 0, $start);
$ret .= $replacement;
$ret .= utf8_substr($string, $start+$length);
return $ret;
}
}
if(!function_exists('utf8_ltrim')){
/**
* Unicode aware replacement for ltrim()
*
* @author Andreas Gohr <andi@splitbrain.org>
* @see ltrim()
* @param string $str
* @param string $charlist
* @return string
*/
function utf8_ltrim($str,$charlist=''){
if($charlist == '') return ltrim($str);
//quote charlist for use in a characterclass
$charlist = preg_replace('!([\\\\\\-\\]\\[/])!','\\\${1}',$charlist);
return preg_replace('/^['.$charlist.']+/u','',$str);
}
}
if(!function_exists('utf8_rtrim')){
/**
* Unicode aware replacement for rtrim()
*
* @author Andreas Gohr <andi@splitbrain.org>
* @see rtrim()
* @param string $str
* @param string $charlist
* @return string
*/
function utf8_rtrim($str,$charlist=''){
if($charlist == '') return rtrim($str);
//quote charlist for use in a characterclass
$charlist = preg_replace('!([\\\\\\-\\]\\[/])!','\\\${1}',$charlist);
return preg_replace('/['.$charlist.']+$/u','',$str);
}
}
if(!function_exists('utf8_trim')){
/**
* Unicode aware replacement for trim()
*
* @author Andreas Gohr <andi@splitbrain.org>
* @see trim()
* @param string $str
* @param string $charlist
* @return string
*/
function utf8_trim($str,$charlist='') {
if($charlist == '') return trim($str);
return utf8_ltrim(utf8_rtrim($str,$charlist),$charlist);
}
}
if(!function_exists('utf8_strtolower')){
/**
* This is a unicode aware replacement for strtolower()
*
* Uses mb_string extension if available
*
* @author Leo Feyer <leo@typolight.org>
* @see strtolower()
* @see utf8_strtoupper()
*/
function utf8_strtolower($string){
if(UTF8_MBSTRING) return mb_strtolower($string,'utf-8');
global $UTF8_UPPER_TO_LOWER;
return strtr($string,$UTF8_UPPER_TO_LOWER);
}
}
if(!function_exists('utf8_strtoupper')){
/**
* This is a unicode aware replacement for strtoupper()
*
* Uses mb_string extension if available
*
* @author Leo Feyer <leo@typolight.org>
* @see strtoupper()
* @see utf8_strtoupper()
*/
function utf8_strtoupper($string){
if(UTF8_MBSTRING) return mb_strtoupper($string,'utf-8');
global $UTF8_LOWER_TO_UPPER;
return strtr($string,$UTF8_LOWER_TO_UPPER);
}
}
if(!function_exists('utf8_ucfirst')){
/**
* UTF-8 aware alternative to ucfirst
* Make a string's first character uppercase
*
* @author Harry Fuecks
* @param string
* @return string with first character as upper case (if applicable)
*/
function utf8_ucfirst($str){
switch ( utf8_strlen($str) ) {
case 0:
return '';
case 1:
return utf8_strtoupper($str);
default:
preg_match('/^(.{1})(.*)$/us', $str, $matches);
return utf8_strtoupper($matches[1]).$matches[2];
}
}
}
if(!function_exists('utf8_ucwords')){
/**
* UTF-8 aware alternative to ucwords
* Uppercase the first character of each word in a string
*
* @author Harry Fuecks
* @param string
* @return string with first char of each word uppercase
* @see http://www.php.net/ucwords
*/
function utf8_ucwords($str) {
// Note: [\x0c\x09\x0b\x0a\x0d\x20] matches;
// form feeds, horizontal tabs, vertical tabs, linefeeds and carriage returns
// This corresponds to the definition of a "word" defined at http://www.php.net/ucwords
$pattern = '/(^|([\x0c\x09\x0b\x0a\x0d\x20]+))([^\x0c\x09\x0b\x0a\x0d\x20]{1})[^\x0c\x09\x0b\x0a\x0d\x20]*/u';
return preg_replace_callback($pattern, 'utf8_ucwords_callback',$str);
}
/**
* Callback function for preg_replace_callback call in utf8_ucwords
* You don't need to call this yourself
*
* @author Harry Fuecks
* @param array $matches matches corresponding to a single word
* @return string with first char of the word in uppercase
* @see utf8_ucwords
* @see utf8_strtoupper
*/
function utf8_ucwords_callback($matches) {
$leadingws = $matches[2];
$ucfirst = utf8_strtoupper($matches[3]);
$ucword = utf8_substr_replace(ltrim($matches[0]),$ucfirst,0,1);
return $leadingws . $ucword;
}
}
if(!function_exists('utf8_deaccent')){
/**
* Replace accented UTF-8 characters by unaccented ASCII-7 equivalents
*
* Use the optional parameter to just deaccent lower ($case = -1) or upper ($case = 1)
* letters. Default is to deaccent both cases ($case = 0)
*
* @author Andreas Gohr <andi@splitbrain.org>
*/
function utf8_deaccent($string,$case=0){
if($case <= 0){
global $UTF8_LOWER_ACCENTS;
$string = strtr($string,$UTF8_LOWER_ACCENTS);
}
if($case >= 0){
global $UTF8_UPPER_ACCENTS;
$string = strtr($string,$UTF8_UPPER_ACCENTS);
}
return $string;
}
}
if(!function_exists('utf8_romanize')){
/**
* Romanize a non-latin string
*
* @author Andreas Gohr <andi@splitbrain.org>
*/
function utf8_romanize($string){
if(utf8_isASCII($string)) return $string; //nothing to do
global $UTF8_ROMANIZATION;
return strtr($string,$UTF8_ROMANIZATION);
}
}
if(!function_exists('utf8_stripspecials')){
/**
* Removes special characters (nonalphanumeric) from a UTF-8 string
*
* This function adds the controlchars 0x00 to 0x19 to the array of
* stripped chars (they are not included in $UTF8_SPECIAL_CHARS)
*
* @author Andreas Gohr <andi@splitbrain.org>
* @param string $string The UTF8 string to strip of special chars
* @param string $repl Replace special with this string
* @param string $additional Additional chars to strip (used in regexp char class)
* @return string
*/
function utf8_stripspecials($string,$repl='',$additional=''){
global $UTF8_SPECIAL_CHARS2;
static $specials = null;
if(is_null($specials)){
#$specials = preg_quote(unicode_to_utf8($UTF8_SPECIAL_CHARS), '/');
$specials = preg_quote($UTF8_SPECIAL_CHARS2, '/');
}
return preg_replace('/['.$additional.'\x00-\x19'.$specials.']/u',$repl,$string);
}
}
if(!function_exists('utf8_strpos')){
/**
* This is an Unicode aware replacement for strpos
*
* @author Leo Feyer <leo@typolight.org>
* @see strpos()
* @param string
* @param string
* @param integer
10BC8
* @return integer
*/
function utf8_strpos($haystack, $needle, $offset=0){
$comp = 0;
$length = null;
while (is_null($length) || $length < $offset) {
$pos = strpos($haystack, $needle, $offset + $comp);
if ($pos === false)
return false;
$length = utf8_strlen(substr($haystack, 0, $pos));
if ($length < $offset)
$comp = $pos - $length;
}
return $length;
}
}
if(!function_exists('utf8_tohtml')){
/**
* Encodes UTF-8 characters to HTML entities
*
* @author Tom N Harris <tnharris@whoopdedo.org>
* @author <vpribish at shopping dot com>
* @link http://www.php.net/manual/en/function.utf8-decode.php
*/
function utf8_tohtml ($str) {
$ret = '';
foreach (utf8_to_unicode($str) as $cp) {
if ($cp < 0x80)
$ret .= chr($cp);
elseif ($cp < 0x100)
$ret .= "&#$cp;";
else
$ret .= '&#x'.dechex($cp).';';
}
return $ret;
}
}
if(!function_exists('utf8_unhtml')){
/**
* Decodes HTML entities to UTF-8 characters
*
* Convert any &#..; entity to a codepoint,
* The entities flag defaults to only decoding numeric entities.
* Pass HTML_ENTITIES and named entities, including & < etc.
* are handled as well. Avoids the problem that would occur if you
* had to decode "&#38;&amp;#38;"
*
* unhtmlspecialchars(utf8_unhtml($s)) -> "&&"
* utf8_unhtml(unhtmlspecialchars($s)) -> "&&#38;"
* what it should be -> "&&#38;"
*
* @author Tom N Harris <tnharris@whoopdedo.org>
* @param string $str UTF-8 encoded string
* @param boolean $entities Flag controlling decoding of named entities.
* @return string UTF-8 encoded string with numeric (and named) entities replaced.
*/
function utf8_unhtml($str, $entities=null) {
static $decoder = null;
if (is_null($decoder))
$decoder = new utf8_entity_decoder();
if (is_null($entities))
return preg_replace_callback('/(&#([Xx])?([0-9A-Za-z]+);)/m',
'utf8_decode_numeric', $str);
else
return preg_replace_callback('/&(#)?([Xx])?([0-9A-Za-z]+);/m',
array(&$decoder, 'decode'), $str);
}
}
if(!function_exists('utf8_decode_numeric')){
/**
* Decodes numeric HTML entities to their correct UTF-8 characters
*
* @param $ent string A numeric entity
* @return string
*/
function utf8_decode_numeric($ent) {
switch ($ent[2]) {
case 'X':
case 'x':
$cp = hexdec($ent[3]);
break;
default:
$cp = intval($ent[3]);
break;
}
return unicode_to_utf8(array($cp));
}
}
if(!class_exists('utf8_entity_decoder')){
/**
* Encapsulate HTML entity decoding tables
*/
class utf8_entity_decoder {
var $table;
/**
* Initializes the decoding tables
*/
function __construct() {
$table = get_html_translation_table(HTML_ENTITIES);
$table = array_flip($table);
$this->table = array_map(array(&$this,'makeutf8'), $table);
}
/**
* Wrapper aorund unicode_to_utf8()
*
* @param $c string
* @return mixed
*/
function makeutf8($c) {
return unicode_to_utf8(array(ord($c)));
}
/**
* Decodes any HTML entity to it's correct UTF-8 char equivalent
*
* @param $ent string An entity
* @return string
*/
function decode($ent) {
if ($ent[1] == '#') {
return utf8_decode_numeric($ent);
} elseif (array_key_exists($ent[0],$this->table)) {
return $this->table[$ent[0]];
} else {
return $ent[0];
}
}
}
}
if(!function_exists('utf8_to_unicode')){
/**
* Takes an UTF-8 string and returns an array of ints representing the
* Unicode characters. Astral planes are supported ie. the ints in the
* output can be > 0xFFFF. Occurrances of the BOM are ignored. Surrogates
* are not allowed.
*
* If $strict is set to true the function returns false if the input
* string isn't a valid UTF-8 octet sequence and raises a PHP error at
* level E_USER_WARNING
*
* Note: this function has been modified slightly in this library to
* trigger errors on encountering bad bytes
*
* @author <hsivonen@iki.fi>
* @author Harry Fuecks <hfuecks@gmail.com>
* @param string $str UTF-8 encoded string
* @param boolean $strict Check for invalid sequences?
* @return mixed array of unicode code points or false if UTF-8 invalid
* @see unicode_to_utf8
* @link http://hsivonen.iki.fi/php-utf8/
* @link http://sourceforge.net/projects/phputf8/
*/
function utf8_to_unicode($str,$strict=false) {
$mState = 0; // cached expected number of octets after the current octet
// until the beginning of the next UTF8 character sequence
$mUcs4 = 0; // cached Unicode character
$mBytes = 1; // cached expected number of octets in the current sequence
$out = array();
$len = strlen($str);
for($i = 0; $i < $len; $i++) {
$in = ord($str{$i});
if ( $mState == 0) {
// When mState is zero we expect either a US-ASCII character or a
// multi-octet sequence.
if (0 == (0x80 & ($in))) {
// US-ASCII, pass straight through.
$out[] = $in;
$mBytes = 1;
} else if (0xC0 == (0xE0 & ($in))) {
// First octet of 2 octet sequence
$mUcs4 = ($in);
$mUcs4 = ($mUcs4 & 0x1F) << 6;
$mState = 1;
$mBytes = 2;
} else if (0xE0 == (0xF0 & ($in))) {
// First octet of 3 octet sequence
$mUcs4 = ($in);
$mUcs4 = ($mUcs4 & 0x0F) << 12;
$mState = 2;
$mBytes = 3;
} else if (0xF0 == (0xF8 & ($in))) {
// First octet of 4 octet sequence
$mUcs4 = ($in);
$mUcs4 = ($mUcs4 & 0x07) << 18;
$mState = 3;
$mBytes = 4;
} else if (0xF8 == (0xFC & ($in))) {
/* First octet of 5 octet sequence.
*
* This is illegal because the encoded codepoint must be either
* (a) not the shortest form or
* (b) outside the Unicode range of 0-0x10FFFF.
* Rather than trying to resynchronize, we will carry on until the end
* of the sequence and let the later error handling code catch it.
*/
$mUcs4 = ($in);
$mUcs4 = ($mUcs4 & 0x03) << 24;
$mState = 4;
$mBytes = 5;
} else if (0xFC == (0xFE & ($in))) {
// First octet of 6 octet sequence, see comments for 5 octet sequence.
$mUcs4 = ($in);
$mUcs4 = ($mUcs4 & 1) << 30;
$mState = 5;
$mBytes = 6;
} elseif($strict) {
/* Current octet is neither in the US-ASCII range nor a legal first
* octet of a multi-octet sequence.
*/
trigger_error(
'utf8_to_unicode: Illegal sequence identifier '.
'in UTF-8 at byte '.$i,
E_USER_WARNING
);
return false;
}
} else {
// When mState is non-zero, we expect a continuation of the multi-octet
// sequence
if (0x80 == (0xC0 & ($in))) {
// Legal continuation.
$shift = ($mState - 1) * 6;
$tmp = $in;
$tmp = ($tmp & 0x0000003F) << $shift;
$mUcs4 |= $tmp;
/**
* End of the multi-octet sequence. mUcs4 now contains the final
* Unicode codepoint to be output
*/
if (0 == --$mState) {
/*
* Check for illegal sequences and codepoints.
*/
// From Unicode 3.1, non-shortest form is illegal
if (((2 == $mBytes) && ($mUcs4 < 0x0080)) ||
10BC8
((3 == $mBytes) && ($mUcs4 < 0x0800)) ||
((4 == $mBytes) && ($mUcs4 < 0x10000)) ||
(4 < $mBytes) ||
// From Unicode 3.2, surrogate characters are illegal
(($mUcs4 & 0xFFFFF800) == 0xD800) ||
// Codepoints outside the Unicode range are illegal
($mUcs4 > 0x10FFFF)) {
if($strict){
trigger_error(
'utf8_to_unicode: Illegal sequence or codepoint '.
'in UTF-8 at byte '.$i,
E_USER_WARNING
);
return false;
}
}
if (0xFEFF != $mUcs4) {
// BOM is legal but we don't want to output it
$out[] = $mUcs4;
}
//initialize UTF8 cache
$mState = 0;
$mUcs4 = 0;
$mBytes = 1;
}
} elseif($strict) {
/**
*((0xC0 & (*in) != 0x80) && (mState != 0))
* Incomplete multi-octet sequence.
*/
trigger_error(
'utf8_to_unicode: Incomplete multi-octet '.
' sequence in UTF-8 at byte '.$i,
E_USER_WARNING
);
return false;
}
}
}
return $out;
}
}
if(!function_exists('unicode_to_utf8')){
/**
* Takes an array of ints representing the Unicode characters and returns
* a UTF-8 string. Astral planes are supported ie. the ints in the
* input can be > 0xFFFF. Occurrances of the BOM are ignored. Surrogates
* are not allowed.
*
* If $strict is set to true the function returns false if the input
* array contains ints that represent surrogates or are outside the
* Unicode range and raises a PHP error at level E_USER_WARNING
*
* Note: this function has been modified slightly in this library to use
* output buffering to concatenate the UTF-8 string (faster) as well as
* reference the array by it's keys
*
* @param array $arr of unicode code points representing a string
* @param boolean $strict Check for invalid sequences?
* @return mixed UTF-8 string or false if array contains invalid code points
* @author <hsivonen@iki.fi>
* @author Harry Fuecks <hfuecks@gmail.com>
* @see utf8_to_unicode
* @link http://hsivonen.iki.fi/php-utf8/
* @link http://sourceforge.net/projects/phputf8/
*/
function unicode_to_utf8($arr,$strict=false) {
if (!is_array($arr)) return '';
ob_start();
foreach (array_keys($arr) as $k) {
if ( ($arr[$k] >= 0) && ($arr[$k] <= 0x007f) ) {
# ASCII range (including control chars)
echo chr($arr[$k]);
} else if ($arr[$k] <= 0x07ff) {
# 2 byte sequence
echo chr(0xc0 | ($arr[$k] >> 6));
echo chr(0x80 | ($arr[$k] & 0x003f));
} else if($arr[$k] == 0xFEFF) {
# Byte order mark (skip)
// nop -- zap the BOM
} else if ($arr[$k] >= 0xD800 && $arr[$k] <= 0xDFFF) {
# Test for illegal surrogates
// found a surrogate
if($strict){
trigger_error(
'unicode_to_utf8: Illegal surrogate '.
'at index: '.$k.', value: '.$arr[$k],
E_USER_WARNING
);
return false;
}
} else if ($arr[$k] <= 0xffff) {
# 3 byte sequence
echo chr(0xe0 | ($arr[$k] >> 12));
echo chr(0x80 | (($arr[$k] >> 6) & 0x003f));
echo chr(0x80 | ($arr[$k] & 0x003f));
} else if ($arr[$k] <= 0x10ffff) {
# 4 byte sequence
echo chr(0xf0 | ($arr[$k] >> 18));
echo chr(0x80 | (($arr[$k] >> 12) & 0x3f));
echo chr(0x80 | (($arr[$k] >> 6) & 0x3f));
echo chr(0x80 | ($arr[$k] & 0x3f));
} elseif($strict) {
trigger_error(
'unicode_to_utf8: Codepoint out of Unicode range '.
'at index: '.$k.', value: '.$arr[$k],
E_USER_WARNING
);
// out of range
return false;
}
}
$result = ob_get_contents();
ob_end_clean();
return $result;
}
}
if(!function_exists('utf8_to_utf16be')){
/**
* UTF-8 to UTF-16BE conversion.
*
* Maybe really UCS-2 without mb_string due to utf8_to_unicode limits
*/
function utf8_to_utf16be(&$str, $bom = false) {
$out = $bom ? "\xFE\xFF" : '';
if(UTF8_MBSTRING) return $out.mb_convert_encoding($str,'UTF-16BE','UTF-8');
$uni = utf8_to_unicode($str);
foreach($uni as $cp){
$out .= pack('n',$cp);
}
return $out;
}
}
if(!function_exists('utf16be_to_utf8')){
/**
* UTF-8 to UTF-16BE conversion.
*
* Maybe really UCS-2 without mb_string due to utf8_to_unicode limits
*/
function utf16be_to_utf8(&$str) {
$uni = unpack('n*',$str);
return unicode_to_utf8($uni);
}
}
if(!function_exists('utf8_bad_replace')){
/**
* Replace bad bytes with an alternative character
*
* ASCII character is recommended for replacement char
*
* PCRE Pattern to locate bad bytes in a UTF-8 string
* Comes from W3 FAQ: Multilingual Forms
* Note: modified to include full ASCII range including control chars
*
* @author Harry Fuecks <hfuecks@gmail.com>
* @see http://www.w3.org/International/questions/qa-forms-utf-8
* @param string $str to search
* @param string $replace to replace bad bytes with (defaults to '?') - use ASCII
* @return string
*/
function utf8_bad_replace($str, $replace = '') {
$UTF8_BAD =
'([\x00-\x7F]'. # ASCII (including control chars)
'|[\xC2-\xDF][\x80-\xBF]'. # non-overlong 2-byte
'|\xE0[\xA0-\xBF][\x80-\xBF]'. # excluding overlongs
'|[\xE1-\xEC\xEE\xEF][\x80-\xBF]{2}'. # straight 3-byte
'|\xED[\x80-\x9F][\x80-\xBF]'. # excluding surrogates
'|\xF0[\x90-\xBF][\x80-\xBF]{2}'. # planes 1-3
'|[\xF1-\xF3][\x80-\xBF]{3}'. # planes 4-15
'|\xF4[\x80-\x8F][\x80-\xBF]{2}'. # plane 16
'|(.{1}))'; # invalid byte
ob_start();
while (preg_match('/'.$UTF8_BAD.'/S', $str, $matches)) {
if ( !isset($matches[2])) {
echo $matches[0];
} else {
echo $replace;
}
$str = substr($str,strlen($matches[0]));
}
$result = ob_get_contents();
ob_end_clean();
return $result;
}
}
if(!function_exists('utf8_correctIdx')){
/**
* adjust a byte index into a utf8 string to a utf8 character boundary
*
* @param $str string utf8 character string
* @param $i int byte index into $str
* @param $next bool direction to search for boundary,
* false = up (current character)
* true = down (next character)
*
* @return int byte index into $str now pointing to a utf8 character boundary
*
* @author chris smith <chris@jalakai.co.uk>
*/
function utf8_correctIdx(&$str,$i,$next=false) {
if ($i <= 0) return 0;
$limit = strlen($str);
if ($i>=$limit) return $limit;
if ($next) {
while (($i<$limit) && ((ord($str[$i]) & 0xC0) == 0x80)) $i++;
} else {
while ($i && ((ord($str[$i]) & 0xC0) == 0x80)) $i--;
}
return $i;
}
}
// only needed if no mb_string available
if(!UTF8_MBSTRING){
/**
* UTF-8 Case lookup table