将一个关联数组转换为一个关联数组，该关联数组的键与另一个关联数组作为其值在 php

Question

我有一个关联数组 $data：

Array
(
  [0] => Array
  (
    [emp_id] => 1
    [emp_name] => Emp1
    [emp_email] => emp1@example.com
    [dep_id] => 1
    [dep_name] => Mario
  )
  [1] => Array
  (
    [emp_id] => 1
    [emp_name] => Emp1
    [emp_email] => emp1@example.com
    [dep_id] => 2
    [dep_name] => Tony
  )
  [2] => Array
  (
    [emp_id] => 2
    [emp_name] => Emp2
    [emp_email] => emp2@example.com
    [dep_id] => 3
    [dep_name] => Jack
  )
)

我想将此数组转换为关联数组，其中“依赖”作为关联数组，具有两个字段dep_name和dep_id字段，如下所示：

Array
(
  [0] => Array
  (
    [emp_id] => 1
    [emp_name] => Emp1
    [emp_email] => emp1@example.com
    [dependant] => [
      [
        [dep_id] => 1
        [dep_name] => Mario
      ]
      [
        [dep_id] => 2
        [dep_name] => Tony
      ]
    ]
)
[1] => Array
(
  [emp_id] => 2
  [emp_name] => Emp2
  [emp_email] => emp2@example.com
  [dependant] => [
    [
        [dep_id] => 3
        [dep_name] => Jack
    ]
  )
)

我尝试使用这种方式：

$newEmployeeInfo = [];
$newEmployeeKey = [];
$newDependantInfo = [];
$newKey = 0;
foreach($data as $dataKey => $dataValue){
   if(!in_array($dataValue["emp_id"],$newEmployeeKey)){
       ++$newKey;
       $newEmployeeInfo[$newKey]["emp_id"] = $dataValue["emp_id"];
       $newEmployeeInfo[$newKey]["emp_name"] = $dataValue["emp_name"];
       $newEmployeeInfo[$newKey]["emp_email"] = $dataValue["emp_email"];
   }                
   $newEmployeeInfo[$newKey]["dependant"][$dataKey] = $dataValue[$newDependantInfo];       
       $newDependantInfo[$newKey]["dep_id"] = $dataValue["dep_id"];
       $newDependantInfo[$newKey]["dep_name"] = $dataValue["dep_name"];                         
       ];                       
 }

我能够使用具有各自值的键emp_id 、 emp_name和emp_email创建关联数组，但无法将dep_id和dep_name推入“依赖”字段。

Answer 1

试试这个

$newArr = [];
foreach($data as $key => $value){
   $newArr[$value['emp_id']]['emp_id'] = $value['emp_id'];
   $newArr[$value['emp_id']]['emp_name'] = $value['emp_name'];
   $newArr[$value['emp_id']]['emp_email'] = $value['emp_email'];
   $newArr[$value['emp_id']]['dependant'][] = [
       'dep_id'=>$value['dep_id'],
       'dep_name'=>$value['dep_name']
    ];
}

也可能您需要重新索引数组，因为索引将是新 arr 中的 emp_id

注意：我还没有测试代码。