preg_match_all("/(.+) \"(.*)\"/",$String,$e);得
Array
(
    [0] => Array
        (
            [0] => contains "test"
            [1] => does not contain "dfbxcvb"
            [2] => contains ""
        )    [1] => Array
        (
            [0] => contains
            [1] => does not contain
            [2] => contains
        )    [2] => Array
        (
            [0] => test
            [1] => dfbxcvb
            [2] => 
        ))