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<?php preg_match("(\a-zA-Z0-9_)?/", "dsgfcdfsg\-sf",$matches); print_r($matches); echo "\n"; preg_match("/(\w*\-)/", "dsgfcdfsg-sf",$matches); print_r($matches);
Output for git.master, git.master_jit, rfc.property-hooks
Warning: preg_match(): Unknown modifier '?' in /in/kCqS1 on line 2 Array ( [0] => dsgfcdfsg- [1] => dsgfcdfsg- )

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