3v4l.org

run code in 300+ PHP versions simultaneously
<?php $test = function() { $p = 'abcde'; $c = 'abc'; var_export(substr($p, 0, strlen($c)) == $c, true); }; $s = microtime(1); for ($i =0; $i < 100; $i++) { $test(); } echo printf('%f2', microtime(1) - $s);

preferences:
34.07 ms | 402 KiB | 5 Q