preg_replace_callback

PHP 4 >= 4.0.5, PHP 5, PHP 7, PHP 8
preg_replace_callback - Perform a regular expression search and replace using a callback
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Manual
Code Examples

Example #1 preg_replace_callback example

Result: April fools day is 04/01/2003 Last christmas was 12/24/2002
<?php
// this text was used in 2002
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Example #2 preg_replace_callback using recursive structure to handle encapsulated BB code

<?php
$input = "plain [indent] deep [indent] deeper [/indent] deep [/indent] plain";
הההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההה
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Example #3 of preg_replace_callback

<?php
function callbackFunction($matches) {
הההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההה
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Function preg_replace_callback:

Regular Expressions (Perl-Compatible) Functions

Most used PHP functions