php数组去除相同的数据

array:6 [▼
0 => {#596 ▼
+"id": 19
+"order": 1
+"video": "data/1458646947.mp4"
+"m3u8": "change/1458646947.mp4"
+"vi_describe": "Ruby与其它语言的不同之处"
+"co_describe": "Ruby基础课程"
+"markdown": ""
+"task": ""
+"appendix": ""
+"addtime": 1459400176
}
1 => {#597 ▼
+"id": 21
+"order": 3
+"video": "data/1458646947.mp4"
+"m3u8": "change/1458646947.mp4"
+"vi_describe": "Ruby的基本语法"
+"co_describe": "Ruby基础课程"
+"markdown": ""
+"task": ""
+"appendix": ""
+"addtime": 1459400204
}
2 => {#598 ▼
+"id": 19
+"order": 1
+"video": "data/1458646947.mp4"
+"m3u8": "change/1458646947.mp4"
+"vi_describe": "Ruby与其它语言的不同之处"
+"co_describe": "Ruby基础课程"
+"markdown": ""
+"task": ""
+"appendix": ""
+"addtime": 1459400176
}
3 => {#599 ▼
+"id": 20
+"order": 2
+"video": "data/1458646947.mp4"
+"m3u8": "change/1458646947.mp4"
+"vi_describe": "Ruby的环境搭建"
+"co_describe": "Ruby基础课程"
+"markdown": ""
+"task": ""
+"appendix": ""
+"addtime": 1459400193
}
4 => {#600 ▼
+"id": 21
+"order": 3
+"video": "data/1458646947.mp4"
+"m3u8": "change/1458646947.mp4"
+"vi_describe": "Ruby的基本语法"
+"co_describe": "Ruby基础课程"
+"markdown": ""
+"task": ""
+"appendix": ""
+"addtime": 1459400204
}
5 => {#601 ▼
+"id": 7
+"order": 2
+"video": "data/1459169959.mp4"
+"m3u8": "change/1459169959.mp4"
+"vi_describe": "unity3d第二节课"
+"co_describe": "手把手带你玩转unity3d"
+"markdown": ""
+"task": ""
+"appendix": ""
+"addtime": 1459311257
}
]
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