3v4l.org

run code in 300+ PHP versions simultaneously
<?php function genRandomString($length=10 ,$characters = '0123456789abcdefghijklmnopqrstuvwxyz',$string = '') { for ($p = 0; $p < $length; $p++) { $string .= $characters[mt_rand(0, strlen($characters)-1)]; } return $string; }
Output for 5.6.0 - 5.6.40, 7.0.0 - 7.0.33, 7.1.0 - 7.1.33, 7.2.0 - 7.2.26, 7.3.0 - 7.3.13, 7.4.0 - 7.4.1
preferences:
137.38 ms | 402 KiB | 157 Q