3v4l.org

run code in 150+ php & hhvm versions
Bugs & Features
<?php $string = preg_quote("\u00a0"); echo preg_replace('(?:^[^\pL]*)','--+--',$string);
Output for 4.4.0 - 4.4.9, 5.0.5 - 7.1.0
Warning: preg_replace(): Compilation failed: nothing to repeat at offset 0 in /in/Gu9h3 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 6 in /in/Gu9h3 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 6 in /in/Gu9h3 on line 3