- var_dump: documentation ( source)
- preg_replace: documentation ( source)
<?php
$variable = '(.+)/e'.chr(0);
$url = 'www.wer.we/?phpinfo();//?xx=1';
$url = preg_replace('/(.*)(\?|&)' . $variable .'smx t55555555smx t55555555', '$1$2$4', $url.'&');
var_dump($variable, $url);die();