php 多维数组按键值分类

背景：现在有一个多维数组，该数组里面的部分一维数组key值是完全一样的，现将一样的数组提取出来，用于做列表展示。

封装方法：

 function arrClassify($arr){
     $data = array();
     $a = 0;
     while ($arr){
         $key = $arr[0];
         $data[$a]['query'] = '第'.$a.'类';
         $data[$a]['head'] = array_keys($key);
         $data[$a]['value'][] = $key;
         unset($arr[0]);
         $i = 1;
         while($i <= count($arr)){
             $result=array_diff_key($arr[$i],$key);
             if(!$result){
                 $data[$a]['value'][] = $arr[$i];
                 unset($arr[$i]);
             }
             $i++;
         }
         $arr = array_values($arr);
         $a++;
     }
     return $data;
 }

封装的方法

示例：

 <?php
 $arr = array(
     array(
         'a' => 1,
         'b' => 1,
         'c' => 1,
         'd' => 1,
     ),
     array(
         'e' => 1,
         'd' => 1,
         'f' => 1,
         'g' => 1,
     ),
     array(
         'a' => 2,
         'b' => 2,
         'c' => 2,
         'd' => 2,
     ),
     array(
         'e' => 2,
         'd' => 2,
         'f' => 2,
         'g' => 2,
     ),
     array(
         'e' => 2,
         'd' => 2,
         'f' => 2,
         'g' => 2,
         'h' => 2,
     ),
     array(
         'e' => 2,
         'd' => 3,
         'f' => 9,
         'g' => 2,
         'h' => 3,
     ),
 );
 $a = arrClassify($arr);
 var_dump($a);

测试用例

运行结果：

测试结果

 array (size=3)
   0 =>
     array (size=3)
       'query' => string '第0类' (length=7)
       'head' =>
         array (size=4)
           0 => string 'a' (length=1)
           1 => string 'b' (length=1)
           2 => string 'c' (length=1)
           3 => string 'd' (length=1)
       'value' =>
         array (size=2)
           0 =>
             array (size=4)
               'a' => int 1
               'b' => int 1
               'c' => int 1
               'd' => int 1
           1 =>
             array (size=4)
               'a' => int 2
               'b' => int 2
               'c' => int 2
               'd' => int 2
   1 =>
     array (size=3)
       'query' => string '第1类' (length=7)
       'head' =>
         array (size=4)
           0 => string 'e' (length=1)
           1 => string 'd' (length=1)
           2 => string 'f' (length=1)
           3 => string 'g' (length=1)
       'value' =>
         array (size=2)
           0 =>
             array (size=4)
               'e' => int 1
               'd' => int 1
               'f' => int 1
               'g' => int 1
           1 =>
             array (size=4)
               'e' => int 2
               'd' => int 2
               'f' => int 2
               'g' => int 2
   2 =>
     array (size=3)
       'query' => string '第2类' (length=7)
       'head' =>
         array (size=5)
           0 => string 'e' (length=1)
           1 => string 'd' (length=1)
           2 => string 'f' (length=1)
           3 => string 'g' (length=1)
           4 => string 'h' (length=1)
       'value' =>
         array (size=2)
           0 =>
             array (size=5)
               'e' => int 2
               'd' => int 2
               'f' => int 2
               'g' => int 2
               'h' => int 2
           1 =>
             array (size=5)
               'e' => int 2
               'd' => int 3
               'f' => int 9
               'g' => int 2
               'h' => int 3