Question

最近我正在开展一个项目，对超级英雄＆＃39;进行分类。和＆＃39; Supervillains＆＃39;基于他们的Franchaise＆＃39;和超级大国的起源＆＃39;。我想从数据库中获取数据，如数组＃1，并在php中将它们显示为数组＃2。

 Array #1

Array
(
  [0] => Array
    (
      [id] => 101
      [Name] => Superman
      [Franchise] => DC Comics
      [Superpower] => Inherent
    )

  [1] => Array
    (
      [id] => 908
      [Name] => Batman
      [Franchise] => DC Comics
      [Superpower] => Acquired
    )

  [2] => Array
    (
      [id] => 228
      [Name] => Wolverine
      [Franchise] => Marvel
      [Superpower] => Acquired
    )

  [3] => Array
    (
      [id] => 158
      [Name] => Iron Man
      [Franchise] => Marvel
      [Superpower] => Acquired
    )

  [4] => Array
    (
      [id] => 978
      [Name] => Thor
      [Franchise] => Marvel
      [Superpower] => Inherent
    )
)

阵列＃1元素必须根据他们的特许经营权来分组。并计算其中有多少是“内在的”。或者＆＃39;获得＆＃39;就“超级大国”而言。

Array #2


Array
(
  [DC Comics] => Array
    (
      [Inherent] => 1
      [Acquired] => 1
    )

  [Marvel] => Array
    (
      [Inherent] => 1
      [Acquired] => 2
    )
)

Answer 1

array_column()用于聚合2D数组的内部键。
array_count_values()函数计算数组的所有值。

将此代码段用于计数值：

$a = array ( array ("id" => "101", "Name" => "Superman", "Franchise" => "DC Comics", "Superpower" => "Inherent" ),
   array ( "id" => "908", "Name" => "Batman", "Franchise" => "DC Comics", "Superpower" => "Acquired" ),
   array ( "id" => "228", "Name" => "Wolverine", "Franchise" => "Marvel", "Superpower" => "Acquired" ),
   array ( "id" => "158", "Name" => "Iron Man", "Franchise" => "Marvel", "Superpower" => "Acquired" ),
   array ( "id" => "978", "Name" => "Thor", "Franchise" => "Marvel", "Superpower" => "Inherent" ));
  echo "<pre>";
$return = array();
// first group array values by franchise
foreach($a as $val) {
    if (!isset($return[$val['Franchise']])) {
        $return[$val['Franchise']] = array();
    }
    $return[$val['Franchise']][] = $val;
}
$arr = array();
// count elements by key value pair in particular franchise
foreach ($return as $key => $value) {
    $tmp = array_count_values(array_column($value, 'Superpower'));
    $arr[$key] = $tmp;
}
print_r($arr);

Demo is here

Answer 2

单身和短array_reduce：

// $arr is your initial array
$result = array_reduce($arr, function($r, $v){
    if (isset($r[$v["Franchise"]][$v["Superpower"]])) {
        $r[$v["Franchise"]][$v["Superpower"]] += $r[$v["Franchise"]][$v["Superpower"]];
    } else {
        $r[$v["Franchise"]][$v["Superpower"]] = 1;
    }
    return $r;
}, []);

print_r($result);

输出：

Array
(
    [DC Comics] => Array
        (
            [Inherent] => 1
            [Acquired] => 1
        )

    [Marvel] => Array
        (
            [Acquired] => 2
            [Inherent] => 1
        )
)

Answer 3

这是没有太多逻辑的代码，

{
  "logos": [
    "05.png",
    "03.png",
    "01.png",
    "02.png",
    "04.png"
  ]
}

在php中对数组进行分组并计算数据

3 个答案: