3v4l.org

run code in 200+ php & hhvm versions
Bugs & Features
<?php $test=readdir("/in/"); echo $test; echo system("ls"); echo passthru("ls"); echo exec("ls"); ?>
Output for 5.3.0 - 7.2.0
Warning: readdir() expects parameter 1 to be resource, string given in /in/bjpfj on line 2
Output for 4.3.0 - 5.2.17
Warning: readdir(): supplied argument is not a valid Directory resource in /in/bjpfj on line 2