Question

有两个阵列说

1. Groups
$groups = array("user", "account", "client")
2. Results
$results = array(
   0 => array(
      "user"    => "U1",
      "account" => "A1",
      "client"  => "C1" 
   ),
   1 => array(
      "user"    => "U1",
      "account" => "A2",
      "client"  => "C1" 
   ),
   0 => array(
      "user"    => "U1",
      "account" => "A3",
      "client"  => "C1" 
   ),
   0 => array(
      "user"    => "U1",
      "account" => "A2",
      "client"  => "C2" 
   ),
   0 => array(
      "user"    => "U1",
      "account" => "A1",
      "client"  => "C4" 
   ),
   0 => array(
      "user"    => "U1",
      "account" => "A1",
      "client"  => "C5" 
   ),
   0 => array(
      "user"    => "U1",
      "account" => "A2",
      "client"  => "C5" 
   )
) ;

我想要关注OUTPUT

$output = array(
   "U1" => array(
       "A1" => array(C1,C4,C5),
       "A2" => array(C1,C2,C5),
       "A3" => array(C1)
   )
);

Groups数组值是动态的，可以是任何顺序。我希望输出顺序，groups数组的第一个值是Output数组的父元素，group数组的第二个值是父Output数组的子元素，依此类推。

Answer 1

只需像这样制作一个foreach循环

$new = array();
foreach($results as $key=>$value){
  $new[$value["user"]][$value["account"]][] = $value["client"];
}
print_r($new);

现场演示：https://eval.in/857969

使用$groups：https://eval.in/857970

$new = array();
foreach($results as $key=>$value){
  $new[$value[$groups[0]]][$value[$groups[1]]][] = $value[$groups[2]];
}

多个用户的示例：https://eval.in/857973

更新

对于动态组数组：如果您不在此处交互用户输入，则可以使用eval。：https://eval.in/858306

Answer 2

我希望您使用的PHP大于或等于5.6。我们有... (splat operator)非常方便：

std::istream

这是working demo。

简而言之，我们利用array_map的能力将任意数量的数组作为参数并且并行地遍历它们。

动态创建基于另一个表字段值的父子关系数组

2 个答案: