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<?php $str = "*yi*"; preg_match('/^(\*?)([^\*]+)\*+/', $str, $m); var_dump($m);
Output for git.master, git.master_jit, rfc.property-hooks
array(3) { [0]=> string(4) "*yi*" [1]=> string(1) "*" [2]=> string(2) "yi" }

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