3v4l.org

run code in 300+ PHP versions simultaneously
<?php $f = fopen('/tmp/test.txt', 'w'); fwrite($f, 'woohoo'); fclose($f); echo file_get_contents('/tmp/test.txt'); echo file_get_contents("php://filter/resource=/etc/passwd");

preferences:
33.7 ms | 402 KiB | 5 Q