3v4l.org

run code in 300+ PHP versions simultaneously
<? echo preg_match('~[0-9a-zA-Zä]~', 'ä'); ?>
Output for 4.3.0 - 4.3.11, 4.4.0 - 4.4.9, 5.0.0 - 5.0.5, 5.1.0 - 5.1.6, 5.2.0 - 5.2.17, 5.3.0 - 5.3.29, 5.4.0 - 5.4.32, 7.2.29 - 7.2.33, 7.3.16 - 7.3.31, 7.4.0 - 7.4.32, 8.0.0 - 8.0.12, 8.0.14 - 8.0.30, 8.1.0 - 8.1.27, 8.2.0 - 8.2.17, 8.3.0 - 8.3.4
<? echo preg_match('~[0-9a-zA-Zä]~', 'ä'); ?>
Output for 5.4.34 - 5.4.45, 5.5.24 - 5.5.35, 5.6.7 - 5.6.28, 7.0.0 - 7.0.20, 7.1.0 - 7.1.20, 7.2.5 - 7.2.6, 7.3.32 - 7.3.33, 7.4.33, 8.0.13
1

preferences:
177.59 ms | 403 KiB | 308 Q