Question

我有以下关联数组列表：

([0] => ([name]=> "Paul", [year] => 2010, items => 4),
 [1] => ([name]=> "Paul", [year] => 2011, items => 5),
 [2] => ([name]=> "George", [year] => 2010, items => 13),
 [3] => ([name]=> "George", [year] => 2011, items => 10))

我需要获取由键“名称”的唯一值列出的关联数组的列表。我的输出应该是：

( ([name] => "Paul") => ([0] => ([year] => 2010, items => 4), 
                         [1] => ([year] => 2011, items => 5)),
  ([name] => "George") => (([0] => ([year] => 2010, items => 13), 
                            [1] => ([year] => 2011, items => 10)))

我该怎么办？

Answer 1

您可以简单地遍历数组并以所需的格式创建一个新数组

$data = [
            ['name' => "Paul", 'year' => 2010, 'items' => 4],
            ['name' => "Paul", 'year' => 2011, 'items' => 5],
            ['name' => "George", 'year' => 2010, 'items' => 13],
            ['name' => "George", 'year' => 2011, 'items' => 10]
        ];

$newArr = [];
foreach($data as $occ){
    $newArr[$occ['name']][] = [ 'year' => $occ['year'], 
                                'items' => $occ['items'] 
                              ];
}

结果：

Array
(
    [Paul] => Array
        (
            [0] => Array
                (
                    [year] => 2010
                    [items] => 4
                )

            [1] => Array
                (
                    [year] => 2011
                    [items] => 5
                )

        )

    [George] => Array
        (
            [0] => Array
                (
                    [year] => 2010
                    [items] => 13
                )

            [1] => Array
                (
                    [year] => 2011
                    [items] => 10
                )

        )

)

Answer 2

您可以这样做

foreach($data as $d){
    $newArr[$d['name']][] = array('year'=>$d['year'],'items'=>$d['items']);
}

Answer 3

请尝试使用此功能以列出键“名称”的唯一值

例如：

    function array_group(array $data, $by_column) {
        $result = [];
        foreach ($data as $item) {
            $column = $item[$by_column];
            unset($item[$by_column]);
            if (isset($result[$column])) {
                $result[$column][] = $item;
            } else {
                $result[$column] = array($item);
            }
        }
        return $result;
    }

$result = array_group($assocArray,'name');

从另一个关联数组php的唯一值创建关联数组

3 个答案: