3v4l.org

run code in 500+ PHP versions simultaneously
<?php error_reporting(0); $argv[1]="uuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuug uuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuu"; $s=substr_count;foreach(explode(' ',$argv[1])as$c)echo chr($s($c,u)+2*$s($c,g));

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23.29 ms | 476 KiB | 4 Q