3v4l.org

run code in 150+ php & hhvm versions
Bugs & Features
<?php $dir=@opendir('/'); $a=array(); while(($f=readdir($dir))){$a[]=$f;}; sort($a); print(join('\n',$a));
Output for 5.3.0 - 7.1.0
Warning: readdir() expects parameter 1 to be resource, boolean given in /in/M13lJ on line 4
Output for 4.3.0 - 5.2.17
Warning: readdir(): supplied argument is not a valid Directory resource in /in/M13lJ on line 4