3v4l.org

run code in 300+ PHP versions simultaneously
<?php $arr=array(); $c=''; for ($i=0;$i<=99999;$i++) { $arr[]=uniqid('',true); } foreach ($arr as $cur) { $c.=$cur; } echo strlen($c); ?>
Output for 4.3.0 - 4.3.11, 4.4.0 - 4.4.9, 5.0.0 - 5.0.5, 5.1.0 - 5.1.6, 5.2.0 - 5.2.17, 5.3.0 - 5.3.29, 5.4.0 - 5.4.45, 5.5.0 - 5.5.35, 5.6.0 - 5.6.28, 7.0.0 - 7.0.20, 7.1.0 - 7.1.7
2300000
preferences:
148.16 ms | 404 KiB | 204 Q