- var_dump: documentation ( source)
- chr: documentation ( source)
- preg_replace_callback: documentation ( source)
- hexdec: documentation ( source)
<?php
$source = '!';
$source = preg_replace_callback(
'/&#x([a-f0-9]+);/mi',
function ($m) { return chr(hexdec($m[1])); }, // Now a Closure
$source
);
var_dump($source);