關于PHP中對JSON 格式的字符串進行編碼并解析，同時可使用正則來獲取內容，看示例： 字符串： {"resp": {"userid": 0, "ret": 0, "subfile_list": [{"gcid": "78FDC87F885EBF1923A5382436419872C71C8D30", "url_hash": "13736464574634719728", "name": "BYD-01/BYD-01.avi", "index": 2, "cid": "E112D7A9BA040D70B0E2B21526239C08393DFC5A", "file_size": 1337602048, "duration": 6553502}, {"gcid": "A78B0E63F56E2F763464837C209AE3B63D14393D", "url_hash": "10856942115347464666", "name": "BYD-02/BYD-02.avi", "index": 5, "cid": "BEB495E1C450F35A3074666F1018243F81706962", "file_size": 941570998, "duration": 6646814}], "main_task_url_hash": "5800245063447153290", "info_hash": "7BD4D21057A3FE850896D2E9790D31A986C09732", "record_num": 12}} 要求：獲取上述字符串中的 gcid 內容 方法一：我們可以使用正則的方式將其進行提取 $str = '{"resp": {"userid": 0, "ret": 0, "subfile_list": [{"gcid": "78FDC87F885EBF1923A5382436419872C71C8D30", "url_hash": "13736464574634719728", "name": "BYD-01/BYD-01.avi", "index": 2, "cid": "E112D7A9BA040D70B0E2B21526239C08393DFC5A", "file_size": 1337602048, "duration": 6553502}, {"gcid": "A78B0E63F56E2F763464837C209AE3B63D14393D", "url_hash": "10856942115347464666", "name": "BYD-02/BYD-02.avi", "index": 5, "cid": "BEB495E1C450F35A3074666F1018243F81706962", "file_size": 941570998, "duration": 6646814}], "main_task_url_hash": "5800245063447153290", "info_hash": "7BD4D21057A3FE850896D2E9790D31A986C09732", "record_num": 12}}'; preg_match('/"gcid":\s*"([a-zA-Z0-9]*)"/', $str, $matches); //var_dump($obj); print_r($matches[1]); 如果要獲取name的值，則應如下表現 preg_match_all('/"name":\s*"([\w\d\.-]*)"/', $str, $matches); //var_dump($obj); print_r($matches[1]); 做到這里，也許你會發現當你的字符串中含有兩個或更多gcid時，你就不能同時獲取這些內容了，但PHP的正則就是這么的強大，你完全可以將preg_match替換成preg_match_all，就可以獲取所有的gcid內容了 方法二：則利用JSON對象的屬性對內容進行獲取 $str = '{"resp": {"userid": 0, "ret": 0, "subfile_list": [{"gcid": "78FDC87F885EBF1923A5382436419872C71C8D30", "url_hash": "13736464574634719728", "name": "BYD-01/BYD-01.avi", "index": 2, "cid": "E112D7A9BA040D70B0E2B21526239C08393DFC5A", "file_size": 1337602048, "duration": 6553502}, {"gcid": "A78B0E63F56E2F763464837C209AE3B63D14393D", "url_hash": "10856942115347464666", "name": "BYD-02/BYD-02.avi", "index": 5, "cid": "BEB495E1C450F35A3074666F1018243F81706962", "file_size": 941570998, "duration": 6646814}], "main_task_url_hash": "5800245063447153290", "info_hash": "7BD4D21057A3FE850896D2E9790D31A986C09732", "record_num": 12}}'; $obj = json_decode($str); //var_dump($obj); print_r($obj->resp->subfile_list[0]->gcid); 好了，兩種方法均獲取成功~ 創作挑戰賽新人創作獎勵來咯，堅持創作打卡瓜分現金大獎

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