php中的數(shù)組如下： array (size=2) 0 => array (size=2) 0 => array (size=4) 'id' => int 1 'fid' => int 0 'title' => string '數(shù)碼1' (length=12) 'level' => int 9 1 => array (size=4) 'id' => int 2 'fid' => int 0 'title' => string '數(shù)碼2' (length=12) 'level' => int 8 1 => array (size=2) 0 => array (size=4) 'id' => int 11 'fid' => int 1 'title' => string '手機1' (length=12) 'level' => int 0 1 => array (size=4) 'id' => int 12 'fid' => int 1 'title' => string '手機2' (length=12) 'level' => int 0 使用json_encode輸出如下： [ [{ "id": 1, "fid": 0, "title": "數(shù)碼1", "level": 9 }, { "id": 2, "fid": 0, "title": "數(shù)碼2", "level": 8 }], [{ "id": 11, "fid": 1, "title": "手機1", "level": 0 }, { "id": 12, "fid": 1, "title": "手機2", "level": 0 }] ] 想要的格式是： "0": [{ "id": 1, "fid": 0, "title": "數(shù)碼1", "level": 9 }, { "id": 2, "fid": 0, "title": "數(shù)碼2", "level": 8 }], "1": [{ "id": 11, "fid": 1, "title": "手機1", "level": 0 }, { "id": 12, "fid": 1, "title": "手機2", "level": 0 }]