3v4l.org

run code in 300+ PHP versions simultaneously
<?php $str = "1234kjhgkdfkgjh"; $result = is_int(substr($str, 0, 2)); var_dump($result);
Output for 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(false)
preferences:
102.59 ms | 402 KiB | 89 Q