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run code in 200+ php & hhvm versions
Bugs & Features
<?php $data = 'foo_bar_p'; echo preg_replace('/^[\pZ\p{Cc}]+|[\pZ\p{Cc}]+$/u', '', $data);
Output for 4.4.0 - 4.4.9, 5.0.5 - 7.2.0
foo_bar_p
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 3 in /in/m76VO 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 3 in /in/m76VO on line 3