按值对多维对象数组进行排序

Question

我有一个xml源，每次都会给我带来一些数据。我用php＆＃39; s simpleXML解析xml，生成的数组如下所示。我的问题是我需要根据携带时间的值对数组进行升序排序。

Array
    (
        [0] => SimpleXMLElement Object
            (
                [dict] => Array
                    (
                        [0] => SimpleXMLElement Object
                            (
                                [key] => Array
                                    (
                                        [0] => channel
                                        [1] => title
                                        [2] => time
                                    )

                                [string] => Array
                                    (
                                        [0] => OTE SPORT 3
                                        [1] => ΕΡΓΟΤΕΛΗΣ - ΤΡΙΚΑΛΑ
                                        [2] => 20:00
                                        [3] => Ποδόσφαιρο
                                    )

                            )

                        [1] => SimpleXMLElement Object
                            (
                                [key] => Array
                                    (
                                        [0] => channel
                                        [1] => title
                                        [2] => time
                                    )

                                [string] => Array
                                    (
                                        [0] => NOVASPORTS 1
                                        [1] => ΠΛΑΤΑΝΙΑΣ - ΟΛΥΜΠΙΑΚΟΣ
                                        [2] => 19:30
                                    )
                            )
                    )
            )

                    [1] => SimpleXMLElement Object
            (
                [dict] => Array
                    (
                        [0] => SimpleXMLElement Object
                            (
                                [key] => Array
                                    (
                                        [0] => channel
                                        [1] => title
                                        [2] => time
                                    )

                                [string] => Array
                                    (
                                        [0] => NOVASPORTS 2
                                        [1] => ΚΟΛΟΣΣΟΣ - ΟΛΥΜΠΙΑΚΟΣ
                                        [2] => 16:00
                                        [3] => Μπάσκετ
                                    )

                            )

                    )

            )
    )