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<?php $test = [ "tesT StriNg%&/()=?aj-hd_86b", "tesTStriNgaj-hd_86b" ]; foreach ($test as $str) { echo (!preg_match("/[^[:alnum:]\-_]/",$str)) ? $str." is valid.\n" : $str." is NOT valid.\n"; } ?>
Output for git.master, git.master_jit, rfc.property-hooks
tesT StriNg%&/()=?aj-hd_86b is NOT valid. tesTStriNgaj-hd_86b is valid.

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