3v4l.org

run code in 300+ PHP versions simultaneously
<?php declare(strict_types=1); var_dump(is_int(00));
Output for 7.4.0 - 7.4.33, 8.0.1 - 8.0.30, 8.1.0 - 8.1.28, 8.2.0 - 8.2.18, 8.3.0 - 8.3.6
bool(true)
preferences:
123.49 ms | 402 KiB | 121 Q