Script to catch mails on development machines

smtp_catcher.php

#!/usr/bin/env php
<?php

# create a filename for this email
list($ms, $time) = explode(' ', microtime());
$filename = '/tmp/'.date('Y-m-d h.i.s,', $time).substr($ms,2,3).'.txt';

# write the email contents to the file
$email_contents = fopen('php://stdin', 'r');
$fstat = fstat($email_contents);
file_put_contents($filename, $fstat['size']."\n");
file_put_contents($filename, $email_contents, FILE_APPEND);

# open up the txt file (using Apple Mail)
exec('open -a "/Applications/Google Chrome.app" '.escapeshellarg($filename));

is there a trick to get it run with OS X 10.10 and XAMPP 1.8.3-5 ?