language: PHP (php 5.4.4)
date: 400 days 14 hours ago
link:
visibility: public 
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<?php
        function cb($a){
        $num = $a[1];
        $dec = hexdec($num);
        return "&#$dec;";
}
$ent = preg_replace_callback("/\\\\x\{([\da-z]+)\}/i", 'cb', "\x{2f}, \x{3251}");
$ustr = html_entity_decode($ent, ENT_NOQUOTES, 'UTF-8');
echo $ustr;
 
?>