3v4l.org

run code in 300+ PHP versions simultaneously
<?php echo(preg_match('/^[\d-\s]+$/', '1-2-3-4'));
Output for 8.2.0 - 8.2.27, 8.3.0 - 8.3.15, 8.4.1 - 8.4.2
Warning: preg_match(): Compilation failed: invalid range in character class at offset 4 in /in/a2YPo on line 3
Output for 7.2.34
1
preferences:
45.62 ms | 406 KiB | 5 Q