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<?php 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
1array(2) { [0]=> string(5) "5.5.5" [1]=> string(5) "5.5.5" }

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