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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 Ml3YN
Output for 4.4.0 - 4.4.9, 5.0.5 - 7.1.0
array(1) { [0]=> string(26) "Lorem ipsum dolor sit amet" }
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/APdkM 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/APdkM on line 5 array(0) { }