本文實例講述了PHP實現的多維數組去重操作。分享給大家供大家參考，具體如下：

最近用到了一個獲取歷史會議列表的問題，需要去這個多維數組去重后返回返回給客戶端，這里使用了幾個php的組裝函數，分享下，示例代碼如下：

?php
$str = '{
  "status": 0,
  "result": [
    {
      "hostName": "楊新",
      "pcode2": "41675441",
      "email": "xin.yang@xx.cn",
      "selfName": "邵兵"
    },
    {
      "hostName": "楊新",
      "pcode2": "41675441",
      "email": "xin.yang@xx.cn",
      "selfName": "邵兵"
    },
    {
      "hostName": "中信國安科技控股有限公司",
      "pcode2": "9730284461",
      "email": "liuxiao@gakj.xx.com",
      "selfName": "邵兵"
    },
    {
      "hostName": "中信國安科技控股有限公司",
      "pcode2": "9730284461",
      "email": "liuxiao@gakj.xx.com",
      "selfName": "邵兵"
    },
    {
      "hostName": "劉惠",
      "pcode2": "64068956",
      "email": "huijie.liu@xx.cn",
      "selfName": "邵兵"
    },
    {
      "hostName": "劉惠",
      "pcode2": "64068956",
      "email": "huijie.liu@xx.cn",
      "selfName": "邵兵"
    },
    {
      "hostName": "劉凱南",
      "pcode2": "14818360",
      "email": "kainan.liu_3@xx.cn",
      "selfName": "邵兵"
    },
    {
      "hostName": "劉凱南",
      "pcode2": "14818360",
      "email": "kainan.liu_3@xx.cn",
      "selfName": "邵兵"
    },
    {
      "hostName": "宋緯奇",
      "pcode2": "62947142",
      "email": "weiqi.song@xx.cn",
      "selfName": "邵兵"
    },
    {
      "hostName": "宋緯奇",
      "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;

運行結果：

num: 10Array ( [0] => Array ( [hostName] => 楊新 [pcode2] => 41675441 [email] => xin.yang@xx.cn [selfName] => 邵兵 ) [1] => Array ( [hostName] => 楊新 [pcode2] => 41675441 [email] => xin.yang@xx.cn [selfName] => 邵兵 ) [2] => Array ( [hostName] => 中信國安科技控股有限公司 [pcode2] => 9730284461 [email] => liuxiao@gakj.xx.com [selfName] => 邵兵 ) [3] => Array ( [hostName] => 中信國安科技控股有限公司 [pcode2] => 9730284461 [email] => liuxiao@gakj.xx.com [selfName] => 邵兵 ) [4] => Array ( [hostName] => 劉惠 [pcode2] => 64068956 [email] => huijie.liu@xx.cn [selfName] => 邵兵 ) [5] => Array ( [hostName] => 劉惠 [pcode2] => 64068956 [email] => huijie.liu@xx.cn [selfName] => 邵兵 ) [6] => Array ( [hostName] => 劉凱南 [pcode2] => 14818360 [email] => kainan.liu_3@xx.cn [selfName] => 邵兵 ) [7] => Array ( [hostName] => 劉凱南 [pcode2] => 14818360 [email] => kainan.liu_3@xx.cn [selfName] => 邵兵 ) [8] => Array ( [hostName] => 宋緯奇 [pcode2] => 62947142 [email] => weiqi.song@xx.cn [selfName] => 邵兵 ) [9] => Array ( [hostName] => 宋緯奇 [pcode2] => 62947142 [email] => weiqi.song@xx.cn [selfName] => 邵兵 ) )

Array ( [0] => Array ( [hostName] => 楊新 [pcode2] => 41675441 [email] => xin.yang@xx.cn [selfName] => 邵兵 ) [2] => Array ( [hostName] => 中信國安科技控股有限公司 [pcode2] => 9730284461 [email] => liuxiao@gakj.xx.com [selfName] => 邵兵 ) [4] => Array ( [hostName] => 劉惠 [pcode2] => 64068956 [email] => huijie.liu@xx.cn [selfName] => 邵兵 ) [6] => Array ( [hostName] => 劉凱南 [pcode2] => 14818360 [email] => kainan.liu_3@xx.cn [selfName] => 邵兵 ) [8] => Array ( [hostName] => 宋緯奇 [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"}}

關于php的序列化的確是幾年前才使用的技術，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。

序列化也還是很有用的。上面的例子中主要是函數array_map()和array_unique()的結合使用。

關于序列化和json編碼的效率對比的文章，可以參考 https://www.jb51.net/article/36177.htm

PS：本站還有兩款比較簡單實用的在線文本去重復工具，推薦給大家使用：

在線去除重復項工具：
http://tools.jb51.net/code/quchong

在線文本去重復工具：
http://tools.jb51.net/aideddesign/txt_quchong

更多關于PHP相關內容感興趣的讀者可查看本站專題：《PHP數組(Array)操作技巧大全》、《PHP常用遍歷算法與技巧總結》、《php字符串(string)用法總結》、《php常用函數與技巧總結》、《PHP錯誤與異常處理方法總結》、《PHP基本語法入門教程》、《php面向對象程序設計入門教程》及《PHP數學運算技巧總結》

希望本文所述對大家PHP程序設計有所幫助。