Replace sendmail script for avoid sending mails to real people on dev

mail.php

#!/usr/local/bin/php
<?php
$email = file_get_contents('php://stdin');

$email = preg_replace('/\b[a-zA-Z0-9._%+-]+@[a-zA-Z0-9.-]+\.[a-zA-Z]{2,4}\b/', '<email_you_want_to_redirect>', $email);

//var_dump($email);
//exit;

$fd = popen("/usr/sbin/sendmail -t","w") or die("Couldn't Open Sendmail"); 
fputs($fd, $email);
pclose($fd);

?>