3v4l.org

run code in 150+ php & hhvm versions
Bugs & Features
<?php var_dump(preg_match('/[ä-z]/u', 'ä'));
Output for 4.3.11 - 7.1.0
Warning: preg_match(): Compilation failed: range out of order in character class at offset 4 in /in/vqNfV on line 3 bool(false)
Output for 4.3.0 - 4.3.10
Warning: Compilation failed: range out of order in character class at offset 4 in /in/vqNfV on line 3 bool(false)