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最近用到了一个获取历史会议列表的问题，需要去这个多维数组去重后返回返回给客户端，这里使用了几个php的组装函数，分享下，示例代码如下：

<?php

$str = '{     "status": 0,     "result": [         {             "hostName": "杨新",             "pcode2": "41675441",             "email": "xin.yang@xx.cn",             "selfName": "邵兵"         },         {             "hostName": "杨新",             "pcode2": "41675441",             "email": "xin.yang@xx.cn",             "selfName": "邵兵"         },         {             "hostName": "中信国安科技控股有限公司",             "pcode2": "9730284461",             "email": "liuxiao@gakj.xx.com",             "selfName": "邵兵"         },         {             "hostName": "中信国安科技控股有限公司",             "pcode2": "9730284461",             "email": "liuxiao@gakj.xx.com",             "selfName": "邵兵"         },         {             "hostName": "刘惠",             "pcode2": "64068956",             "email": "huijie.liu@xx.cn",             "selfName": "邵兵"         },         {             "hostName": "刘惠",             "pcode2": "64068956",             "email": "huijie.liu@xx.cn",             "selfName": "邵兵"         },         {             "hostName": "刘凯南",             "pcode2": "14818360",             "email": "kainan.liu_3@xx.cn",             "selfName": "邵兵"         },         {             "hostName": "刘凯南",             "pcode2": "14818360",             "email": "kainan.liu_3@xx.cn",             "selfName": "邵兵"         },         {             "hostName": "宋纬奇",             "pcode2": "62947142",             "email": "weiqi.song@xx.cn",             "selfName": "邵兵"         },         {             "hostName": "宋纬奇",             "pcode2": "62947142",             "email": "weiqi.song@xx.cn",             "selfName": "邵兵"         }     ],     "content_type": "application/json" }'; $res = json_decode($str,true); echo  'num: '.count($res['result']); print_r($res['result']); echo "</br></br></br>"; $rrr = $res['result']; $serializeArrs = array_map('serialize',$rrr); $uniqueArrs = array_unique($serializeArrs); $unserializeArrs = array_map('unserialize',$uniqueArrs); print_r($unserializeArrs); echo "</br></br></br>"; echo json_encode($unserializeArrs);

exit;

关于php的序列化的确是几年前才使用的技术，目前大家更多的是使用json_encode，且后者效率也比php的序列化高。

序列化也还是很有用的。上面的例子中主要是函数array_map()和array_unique()的结合使用。

关于序列化和json编码的效率对比的文章，可以参考 http://blog.csdn.net/hguisu/article/details/7651730