3v4l.org

run code in 300+ PHP versions simultaneously
<?php $string = "someString"; echo ord('z'); function rot13($str) { for ($i = 0,$l = strlen($str);$i<$l;$i++) { $str[$i] = chr(((ord($str[$i])-84)%26)+97); } } echo rot13('z').str_rot13('z');

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41.24 ms | 402 KiB | 5 Q