3v4l.org

run code in 300+ PHP versions simultaneously
<?php print substr(str_shuffle("0123456789abcdefghijklmnopqrstuvwxyz"), 0, $l);
Output for 5.5.24 - 5.5.35, 5.6.8 - 5.6.28, 7.0.0 - 7.0.20, 7.1.0 - 7.1.33, 7.2.17 - 7.2.25, 7.3.0 - 7.3.12, 7.4.0
Notice: Undefined variable: l in /in/VY3vF on line 4
preferences:
105.29 ms | 403 KiB | 75 Q