3v4l.org

run code in 300+ PHP versions simultaneously
<?php echo is_numeric('0,5 месяца');
Output for 8.1.0 - 8.1.29, 8.2.0 - 8.2.23, 8.3.0 - 8.3.11
preferences:
50.61 ms | 406 KiB | 5 Q