3v4l.org

run code in 300+ PHP versions simultaneously
<?php echo (int)is_numeric('0,5 месяца');
Output for 8.1.0 - 8.1.27, 8.2.0 - 8.2.18, 8.3.0 - 8.3.6
0

preferences:
75.35 ms | 402 KiB | 59 Q