3v4l.org

run code in 300+ PHP versions simultaneously
<?php $str = "Hello World!"; $len = strlen($str); $out = ''; for($i = 0; $i < $len; $i++){ $out .= ord($str[$i]); } echo $out;
Output for 5.5.0 - 5.5.35, 5.6.0 - 5.6.28, 7.0.0 - 7.0.20, 7.1.0 - 7.1.20, 7.2.0 - 7.2.33, 7.3.16 - 7.3.33, 7.4.0 - 7.4.33, 8.0.0 - 8.0.30, 8.1.0 - 8.1.27, 8.2.0 - 8.2.17, 8.3.0 - 8.3.4
72101108108111328711111410810033

preferences:
197.98 ms | 404 KiB | 209 Q