3v4l.org

run code in 300+ PHP versions simultaneously
<?php $s = microtime(1); $i = 0; while (true) { if ( $i>100000 ) break; is_callable('strlen'); } var_dump(microtime(1) - $s);
Output for 4.3.0 - 4.3.11, 4.4.0 - 4.4.9, 5.0.0 - 5.0.5, 5.1.0 - 5.1.6, 5.2.0 - 5.2.17, 5.3.0 - 5.3.29, 5.4.0 - 5.4.45, 5.5.24 - 5.5.35, 5.6.8 - 5.6.28, 7.0.0 - 7.0.20, 7.1.0 - 7.1.7

Process exited with code 137.
preferences:
126.16 ms | 404 KiB | 173 Q