php – 如何按特定子阵列值对多维数组进行分组？

我有一个多维数组,我试图根据特定列中的值对它们进行分组.

我试图按级别对它们进行分组,但我事先并不会真正知道这个级别.所以,这并不是说我可以把它放在for循环中然后说$i< 7,因为我不知道7是水平键的最大值,坦白说,我不确定即使我这样做,我也不需要这样做...

Array (
   [0] => Array (
          [cust] => XT8900
          [type] => standard
          [level] => 1
          )
   [1] => Array (
          [cust] => XT8944
          [type] => standard
          [level] => 1
          )
   [2] => Array (
          [cust] => XT8922
          [type] => premier
          [level] => 3
          )
   [3] => Array (
          [cust] => XT8816
          [type] => permier
          [level] => 3
          )
   [4] => Array (
          [cust] => XT7434
          [type] => standard
          [level] => 7
          )
)

我希望生产的东西：

Array (

   [1] => Array (
          [0] => Array (
                    [cust] => XT8900
                    [type] => standard
                    )
          [1] => Array (
                    [cust] => XT8944
                    [type] => standard
                    )
          )

   [3] => Array (
          [2] => Array (
                 [cust] => XT8922
                 [type] => premier
                 )

          [3] => Array (
                 [cust] => XT8816
                 [type] => permier
                 )
          )

   [7] => Array (
          [4] => Array (
                 [cust] => XT7434
                 [type] => standard
                 )
          )
)

解决方法:

您需要先按级别对它们进行分组

如果级别与前一项相同,则使用foreach循环到数组检查,然后将其与该数组分组

  $templevel=0;   

  $newkey=0;

  $grouparr[$templevel]="";

  foreach ($items as $key => $val) {
   if ($templevel==$val['level']){
     $grouparr[$templevel][$newkey]=$val;
   } else {
     $grouparr[$val['level']][$newkey]=$val;
   }
     $newkey++;       
  }
print($grouparr);

print的输出($grouparr);将显示您希望的格式

你也可以尝试

print($grouparr[7]);

会显示

 [7] => Array (
      [4] => Array (
             [cust] => XT7434
             [type] => standard
             )
      )

要么

print($grouparr[3]);

会显示

[3] => Array (
      [2] => Array (
             [cust] => XT8922
             [type] => premier
             )

      [3] => Array (
             [cust] => XT8816
             [type] => permier
             )
      )