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": "[e-mail]",
      "selfname": "邵兵"
    },
    {
      "hostname": "杨新",
      "pcode2": "41675441",
      "email": "[e-mail]",
      "selfname": "邵兵"
    },
    {
      "hostname": "中信国安科技控股有限公司",
      "pcode2": "9730284461",
      "email": "[e-mail]",
      "selfname": "邵兵"
    },
    {
      "hostname": "中信国安科技控股有限公司",
      "pcode2": "9730284461",
      "email": "[e-mail]",
      "selfname": "邵兵"
    },
    {
      "hostname": "刘惠",
      "pcode2": "64068956",
      "email": "[e-mail]",
      "selfname": "邵兵"
    },
    {
      "hostname": "刘惠",
      "pcode2": "64068956",
      "email": "[e-mail]",
      "selfname": "邵兵"
    },
    {
      "hostname": "刘凯南",
      "pcode2": "14818360",
      "email": "[e-mail]",
      "selfname": "邵兵"
    },
    {
      "hostname": "刘凯南",
      "pcode2": "14818360",
      "email": "[e-mail]",
      "selfname": "邵兵"
    },
    {
      "hostname": "宋纬奇",
      "pcode2": "62947142",
      "email": "[e-mail]",
      "selfname": "邵兵"
    },
    {
      "hostname": "宋纬奇",
      "pcode2": "62947142",
      "email": "[e-mail]",
      "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] => [e-mail] [selfname] => 邵兵 ) [1] => array ( [hostname] => 杨新 [pcode2] => 41675441 [email] => [e-mail] [selfname] => 邵兵 ) [2] => array ( [hostname] => 中信国安科技控股有限公司 [pcode2] => 9730284461 [email] => [e-mail] [selfname] => 邵兵 ) [3] => array ( [hostname] => 中信国安科技控股有限公司 [pcode2] => 9730284461 [email] => [e-mail] [selfname] => 邵兵 ) [4] => array ( [hostname] => 刘惠 [pcode2] => 64068956 [email] => [e-mail] [selfname] => 邵兵 ) [5] => array ( [hostname] => 刘惠 [pcode2] => 64068956 [email] => [e-mail] [selfname] => 邵兵 ) [6] => array ( [hostname] => 刘凯南 [pcode2] => 14818360 [email] => [e-mail] [selfname] => 邵兵 ) [7] => array ( [hostname] => 刘凯南 [pcode2] => 14818360 [email] => [e-mail] [selfname] => 邵兵 ) [8] => array ( [hostname] => 宋纬奇 [pcode2] => 62947142 [email] => [e-mail] [selfname] => 邵兵 ) [9] => array ( [hostname] => 宋纬奇 [pcode2] => 62947142 [email] => [e-mail] [selfname] => 邵兵 ) )

array ( [0] => array ( [hostname] => 杨新 [pcode2] => 41675441 [email] => [e-mail] [selfname] => 邵兵 ) [2] => array ( [hostname] => 中信国安科技控股有限公司 [pcode2] => 9730284461 [email] => [e-mail] [selfname] => 邵兵 ) [4] => array ( [hostname] => 刘惠 [pcode2] => 64068956 [email] => [e-mail] [selfname] => 邵兵 ) [6] => array ( [hostname] => 刘凯南 [pcode2] => 14818360 [email] => [e-mail] [selfname] => 邵兵 ) [8] => array ( [hostname] => 宋纬奇 [pcode2] => 62947142 [email] => [e-mail] [selfname] => 邵兵 ) )

{"0":{"hostname":"\u6768\u65b0","pcode2":"41675441","email":"[e-mail]","selfname":"\u90b5\u5175"},"2":{"hostname":"\u4e2d\u4fe1\u56fd\u5b89\u79d1\u6280\u63a7\u80a1\u6709\u9650\u516c\u53f8","pcode2":"9730284461","email":"[e-mail]","selfname":"\u90b5\u5175"},"4":{"hostname":"\u5218\u60e0","pcode2":"64068956","email":"[e-mail]","selfname":"\u90b5\u5175"},"6":{"hostname":"\u5218\u51ef\u5357","pcode2":"14818360","email":"[e-mail]","selfname":"\u90b5\u5175"},"8":{"hostname":"\u5b8b\u7eac\u5947","pcode2":"62947142","email":"[e-mail]","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

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：

在线文本去重复工具：

更多关于php相关内容感兴趣的读者可查看本站专题：《php数组(array)操作技巧大全》、《php常用遍历算法与技巧总结》、《php字符串(string)用法总结》、《php常用函数与技巧总结》、《php错误与异常处理方法总结》、《php基本语法入门教程》、《php面向对象程序设计入门教程》及《php数学运算技巧总结》

希望本文所述对大家php程序设计有所帮助。