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<?php $kw = " asdsdfsdf \xFF as "; $pattern = '/[[:cntrl:]' . preg_quote(',!@%^*()={};~`<>?\|', '/') . ']/u'; var_dump($pattern); var_dump(var_export($pattern, true)); var_dump(preg_match($pattern, $kw));
Output for git.master, git.master_jit, rfc.property-hooks
string(46) "/[[:cntrl:],\!@%\^\*\(\)\=\{\};~`\<\>\?\\\|]/u" string(62) "'/[[:cntrl:],\\!@%\\^\\*\\(\\)\\=\\{\\};~`\\<\\>\\?\\\\\\|]/u'" bool(false)

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