php 多维数组相同键值处理合并

一、前言

在实际情况中，有时需要针对多维数组相同键值作相应的处理（四则运算、比较大小等）后才能够使用到实际情况中，现给出三维数组(多维数组可相应拓展)任意多个相同键值处理的函数，以备查阅。

二、代码

 <?php
 //任意多个相同键值的数组合并
 //预先将所要合并的数组组装成一个新的数组

     $arr = array(
       '1' => array(
             '1' => array(
                 "channelName"         => "渠道1",
                 "firstRegisterTime"   => "2018-12-20 10:23:57",
                 "firstChargeNum"      => 168,
             ),
             '2' => array(
                 "channelName"         => "渠道2",
                 "firstRegisterTime"   => "2018-12-20 10:23:57",
                 "firstChargeNum"      => 127,
             ),
             '3' => array(
                 "channelName"         => "渠道3",
                 "firstRegisterTime"   => "2018-12-10 11:23:57",
                 "firstChargeNum"      => 69,
             ),
         ),
       '2' => array(
             '1' => array(
                 "channelName"         => "渠道1",
                 "firstRegisterTime"   => "2017-12-29 10:23:57",
                 "firstChargeNum"      => 798,
             ),
             '2' => array(
                 "channelName"         => "渠道2",
                 "firstRegisterTime"   => "2018-12-20 10:23:57",
                 "firstChargeNum"      => 985,
             ),
             '3' => array(
                 "channelName"         => "渠道3",
                 "firstRegisterTime"   => "2017-12-20 11:23:57",
                 "firstChargeNum"      => 54,
             ),
         ),
     );
     print_r($arr);
     $result = arr_format($arr);
     print_r($result);

     /**
      * [comm_sumarrs 多维数组相同键值处理合并]
      * @param  [array] $data   [原始数据]
      * @return [array] $res    [合并完数据]
      *
      */
     function arr_format($arr){
         $res = array();
         // 三维数组，循环三次(foreach)
         foreach ( $arr as $key => $value ) {
             foreach( $value as $k=>$v ){
                 foreach ( $v as $k1 => $v1 ) {    // 循环具体键值
                     if ( isset($res[$k][$k1]) ){
                         if ( $k1 == 'firstRegisterTime' ) { // 相同键值时间戳比较，更新为最早的
                             if( strtotime($v1) < strtotime($res[$k][$k1]) ){
                                 $res[$k][$k1] = $v1;
                             }
                         }
                         if ( $k1 == 'firstChargeNum' ) { // 相同键值相加
                             $res[$k][$k1] += $v1;
                         }
                     }else{
                         $res[$k][$k1] = $v1;
                     }
                 }
             }
         }
         return $res;
     }

 ?>

三、运行结果

处理前数组：

 Array
 (
     [1] => Array
         (
             [1] => Array
                 (
                     [channelName] => 渠道1
                     [firstRegisterTime] => 2018-12-20 10:23:57
                     [firstChargeNum] => 168
                 )

             [2] => Array
                 (
                     [channelName] => 渠道2
                     [firstRegisterTime] => 2018-12-20 10:23:57
                     [firstChargeNum] => 127
                 )

             [3] => Array
                 (
                     [channelName] => 渠道3
                     [firstRegisterTime] => 2018-12-10 11:23:57
                     [firstChargeNum] => 69
                 )

         )

     [2] => Array
         (
             [1] => Array
                 (
                     [channelName] => 渠道1
                     [firstRegisterTime] => 2017-12-29 10:23:57
                     [firstChargeNum] => 798
                 )

             [2] => Array
                 (
                     [channelName] => 渠道2
                     [firstRegisterTime] => 2018-12-20 10:23:57
                     [firstChargeNum] => 985
                 )

             [3] => Array
                 (
                     [channelName] => 渠道3
                     [firstRegisterTime] => 2017-12-20 11:23:57
                     [firstChargeNum] => 54
                 )

         )

 )

处理后数组：

Array
(
    [1] => Array
        (
            [channelName] => 渠道1
            [firstRegisterTime] => 2017-12-29 10:23:57
            [firstChargeNum] => 966
        )

    [2] => Array
        (
            [channelName] => 渠道2
            [firstRegisterTime] => 2018-12-20 10:23:57
            [firstChargeNum] => 1112
        )

    [3] => Array
        (
            [channelName] => 渠道3
            [firstRegisterTime] => 2017-12-20 11:23:57
            [firstChargeNum] => 123
        )

)