- urldecode: documentation ( source)
- urlencode: documentation ( source)
- html_entity_decode: documentation ( source)
<?php
$param = 'L\'Etest';
$res1 = html_entity_encode(urlencode($param));
$res2 = html_entity_decode(urldecode($param));
echo $res2 . PHP_EOL;
echo $res1 . PHP_EOL;
echo $param . PHP_EOL;