3v4l.org

run code in 150+ php & hhvm versions
Bugs & Features
<?php $string = 'Lorem ipsum dolor sit amet'; preg_match('~^[\pL\pN]+$~u', $string, $alphanumeric); var_dump($alphanumeric);
based on b2mRV
Output for 4.4.0 - 4.4.9, 5.0.5 - 7.1.0
array(0) { }
Output for 4.3.11, 5.0.0 - 5.0.4
Warning: preg_match(): Compilation failed: PCRE does not support \L, \l, \N, \P, \p, \U, \u, or \X at offset 3 in /in/67tkI on line 5 array(0) { }
Output for 4.3.0 - 4.3.10
Warning: Compilation failed: PCRE does not support \L, \l, \N, \P, \p, \U, \u, or \X at offset 3 in /in/67tkI on line 5 array(0) { }