3v4l.org

run code in 200+ php & hhvm versions
Bugs & Features
<?php $string='دد'; echo preg_replace('#(?:^[^\p\L]*)|(?:[^\p\L]*$)#u','',$string);
Output for 4.4.6 - 4.4.9, 5.2.2 - 7.1.7
Warning: preg_replace(): Compilation failed: unknown property name after \P or \p at offset 8 in /in/GPfTt on line 3
Output for 4.4.0 - 4.4.5, 5.0.5 - 5.2.1
Warning: preg_replace(): Compilation failed: PCRE does not support \L, \l, \N, \U, or \u at offset 9 in /in/GPfTt on line 3
Output for 4.3.11, 5.0.0 - 5.0.4
Warning: preg_replace(): Compilation failed: PCRE does not support \L, \l, \N, \P, \p, \U, \u, or \X at offset 7 in /in/GPfTt on line 3
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 7 in /in/GPfTt on line 3