3v4l.org

run code in 300+ PHP versions simultaneously
<?php for ($x=0,$a=null;$x<80;$x++) { $chars = 'abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789'; $a .= substr($chars,mt_rand(0,61),1); } echo $a;

preferences:
28.06 ms | 402 KiB | 5 Q