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。

关于序列化和json编码的效率对比的文章，可以参考 https://www.jb51.net/article/36177.htm

PS：本站还有两款比较简单实用的在线文本去重复工具，推荐给大家使用：

在线去除重复项工具：
http://tools.jb51.net/code/quchong

在线文本去重复工具：
http://tools.jb51.net/aideddesign/txt_quchong

希望本文所述对大家PHP程序设计有所帮助。