3v4l.org

run code in 150+ php & hhvm versions
Bugs & Features
<? echo preg_match('~^[0-9a-zA-ZäöüÄÖÜß]{3,20}$~', 'bob_-.ßä'); ?>
based on OJWSj
Output for 5.4.0 - 7.1.0
0
Output for 4.3.0 - 5.3.29
<? echo preg_match('~^[0-9a-zA-ZäöüÄÖÜß]{3,20}$~', 'bob_-.ßä'); ?>