3v4l.org

run code in 300+ PHP versions simultaneously
<?php function foo() { bar(); } function bar() { baz(); } function baz() { boom(); } function boom() { return false; } function test($n) { for ($i = 0; $i < $n; $i++) { foo(); } } $n = 1000000; $t = microtime(true); test($n); echo (microtime(true) - $t)*1000000/$n . ' us/iteration';

preferences:
10.79 ms | 407 KiB | 5 Q