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21 years ago
If you are using the result of array_search in a condition statement, make sure you use the === operator instead of == to test whether or not it found a match.  Otherwise, searching through an array with numeric indicies will result in index 0 always getting evaluated as false/null.  This nuance cost me a lot of time and sanity, so I hope this helps someone.  In case you don't know what I'm talking about, here's an example:



<?php

$code = array("a", "b", "a", "c", "a", "b", "b"); // infamous abacabb mortal kombat code :-P



// this is WRONG

while (($key = array_search("a", $code)) != NULL)

{

 // infinite loop, regardless of the unset

 unset($code[$key]);

}



// this is _RIGHT_

while (($key = array_search("a", $code)) !== NULL)

{

 // loop will terminate

 unset($code[$key]);

}

?>
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