- var_dump: documentation ( source)
- json_decode: documentation ( source)
- html_entity_decode: documentation ( source)
<?php
$text = '\x5Bli\x5DLevel\x3A\x2023\x5B\x2Fli\x5D';
var_dump(json_decode($text, true));
var_dump(html_entity_decode($text, ENT_QUOTES, 'UTF-8'));