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<?php $array = array(); echo preg_match('/?!([\d]+\.[\d]+\.[\d]+)/', '5.5.5-pl-udmedia', $array); var_dump($array);
Output for git.master, git.master_jit, rfc.property-hooks
Warning: preg_match(): Compilation failed: quantifier does not follow a repeatable item at offset 0 in /in/tRlrh on line 4 array(0) { }

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