- var_dump: documentation ( source)
- preg_replace: documentation ( source)
<?php
$secret = 9292929;
$data = '$secret = 1111111';
$trigger = ".*)/e\0";
// function to emphasizes the searched word in the results
preg_replace( "/($trigger)/i", '"<em>" . strtoupper($1) . "</em>"', $data );
var_dump( $secret );