3v4l.org

run code in 150+ php & hhvm versions
Bugs & Features
<?php $file = '0004f21edd14-boot.cfg'; echo preg_match('/\A0004f2([a-fA-F0-9]{6})-(?boot\.log|app\.log|now-boot\.log)\Z/', $file, $d); print_r($d);
Output for 5.2.6 - 5.6.28, 7.0.0 - 7.1.0
Warning: preg_match(): Compilation failed: unrecognized character after (? or (?- at offset 27 in /in/El6Ce on line 3
Output for hhvm-3.10.0 - 3.12.0
Warning: Compilation failed: unrecognized character after (? or (?- at offset 27 in /in/El6Ce on line 3
Output for 5.2.0 - 5.2.5
Warning: preg_match(): Compilation failed: unrecognized character after (? at offset 27 in /in/El6Ce on line 3
Output for 4.3.11 - 4.4.8, 5.0.0 - 5.1.6
Warning: preg_match(): Compilation failed: unrecognized character after (? at offset 27 in /in/El6Ce on line 3 Array ( )
Output for 4.4.9
Warning: preg_match(): Compilation failed: unrecognized character after (? or (?- at offset 27 in /in/El6Ce on line 3 Array ( )
Output for 4.3.0 - 4.3.10
Warning: Compilation failed: unrecognized character after (? at offset 27 in /in/El6Ce on line 3 Array ( )