3v4l.org

run code in 300+ PHP versions simultaneously
<?php echo is_numeric('0,5 месяца');
Output for 8.1.0 - 8.1.27, 8.2.0 - 8.2.17, 8.3.0 - 8.3.6

preferences:
67.05 ms | 402 KiB | 58 Q