3v4l.org

run code in 300+ PHP versions simultaneously
<?php $str = "Hello"; echo md5($str); echo ('< br>'); $split=(str_split(md5($str),2)); echo $split[0]; echo ('< br>'); echo $split[1]; echo ('< br>'); echo $split[2]; echo ('< br>'); echo md5($split[1]); ?>

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42.59 ms | 402 KiB | 5 Q