PHP实现的多维数组去重操作示例

本文实例讲述了PHP实现的多维数组去重操作。分享给大家供大家参考，具体如下：

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;

运行结果：

num: 10Array ( [0] => Array ( [hostName] => 杨新 [pcode2] => 41675441 [email] => xin.yang@xx.cn [selfName] => 邵兵 ) [1] => Array ( [hostName] => 杨新 [pcode2] => 41675441 [email] => xin.yang@xx.cn [selfName] => 邵兵 ) [2] => Array ( [hostName] => 中信国安科技控股有限公司 [pcode2] => 9730284461 [email] => liuxiao@gakj.xx.com [selfName] => 邵兵 ) [3] => Array ( [hostName] => 中信国安科技控股有限公司 [pcode2] => 9730284461 [email] => liuxiao@gakj.xx.com [selfName] => 邵兵 ) [4] => Array ( [hostName] => 刘惠 [pcode2] => 64068956 [email] => huijie.liu@xx.cn [selfName] => 邵兵 ) [5] => Array ( [hostName] => 刘惠 [pcode2] => 64068956 [email] => huijie.liu@xx.cn [selfName] => 邵兵 ) [6] => Array ( [hostName] => 刘凯南 [pcode2] => 14818360 [email] => kainan.liu_3@xx.cn [selfName] => 邵兵 ) [7] => Array ( [hostName] => 刘凯南 [pcode2] => 14818360 [email] => kainan.liu_3@xx.cn [selfName] => 邵兵 ) [8] => Array ( [hostName] => 宋纬奇 [pcode2] => 62947142 [email] => weiqi.song@xx.cn [selfName] => 邵兵 ) [9] => Array ( [hostName] => 宋纬奇 [pcode2] => 62947142 [email] => weiqi.song@xx.cn [selfName] => 邵兵 ) )

Array ( [0] => Array ( [hostName] => 杨新 [pcode2] => 41675441 [email] => xin.yang@xx.cn [selfName] => 邵兵 ) [2] => Array ( [hostName] => 中信国安科技控股有限公司 [pcode2] => 9730284461 [email] => liuxiao@gakj.xx.com [selfName] => 邵兵 ) [4] => Array ( [hostName] => 刘惠 [pcode2] => 64068956 [email] => huijie.liu@xx.cn [selfName] => 邵兵 ) [6] => Array ( [hostName] => 刘凯南 [pcode2] => 14818360 [email] => kainan.liu_3@xx.cn [selfName] => 邵兵 ) [8] => Array ( [hostName] => 宋纬奇 [pcode2] => 62947142 [email] => weiqi.song@xx.cn [selfName] => 邵兵 ) )

{"0":{"hostName":"/u6768/u65b0","pcode2":"41675441","email":"xin.yang@xx.cn","selfName":"/u90b5/u5175"},"2":{"hostName":"/u4e2d/u4fe1/u56fd/u5b89/u79d1/u6280/u63a7/u80a1/u6709/u9650/u516c/u53f8","pcode2":"9730284461","email":"liuxiao@gakj.xx.com","selfName":"/u90b5/u5175"},"4":{"hostName":"/u5218/u60e0","pcode2":"64068956","email":"huijie.liu@xx.cn","selfName":"/u90b5/u5175"},"6":{"hostName":"/u5218/u51ef/u5357","pcode2":"14818360","email":"kainan.liu_3@xx.cn","selfName":"/u90b5/u5175"},"8":{"hostName":"/u5b8b/u7eac/u5947","pcode2":"62947142","email":"weiqi.song@xx.cn","selfName":"/u90b5/u5175"}}

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。