PHP - 合并和组合数组

Question

我有 3 个数组，如下所示：数组 1：array 1: [  0 => array[    "product_id" => "a"    "quantity_1" => "1"  ]  1 => array[    "product_id" => "b"    "quantity_1" => "2"  ]  2 => array[    "product_id" => "c"    "quantity_1" => "1"  ]]数组 2：array 2: [  0 => array[    "product_id" => "a"    "quantity_2" => "1"  ]  1 => array[    "product_id" => "d"    "quantity_2" => "2"  ]]我想要的结果是：array 3: [  0 => array[    "product_id" => "a"    "quantity_1" => "1"    "quantity_2" => "1"  ]  1 => array[    "product_id" => "b"    "quantity_1" => "2"  ]  2 => array[    "product_id" => "c"    "quantity_1" => "1"  ]  3 => array[    "product_id" => "d"    "quantity_2" => "2"  ]]我尝试使用 array_combine() 函数，但结果并不如预期

Answer 1

如果您愿意将 product_id 作为密钥，那么您可以这样做：

$a = [

  0 => [

    "product_id" => "a",

    "quantity_1" => "1"

  ],

  1 => [

    "product_id" => "b",

    "quantity_1" => "2"

  ],

  2 => [

    "product_id" => "c",

    "quantity_1" => "1"

  ]

];

$b =  [

  0 => [

    "product_id" => "a",

    "quantity_2" => "1"

  ],

  1 => [

    "product_id" => "d",

    "quantity_2" => "2"

  ]

];

 print_r(

      array_replace_recursive(

             array_column($a, null, 'product_id'),

             array_column($b, null, 'product_id')

      )

 );

输出

Array

(

    [a] => Array

        (

            [product_id] => a

            [quantity_1] => 1

            [quantity_2] => 1

        )

    [b] => Array

        (

            [product_id] => b

            [quantity_1] => 2

        )

    [c] => Array

        (

            [product_id] => c

            [quantity_1] => 1

        )

    [d] => Array

        (

            [product_id] => d

            [quantity_2] => 2

        )

)

沙盒

您可以随时从结果中删除密钥，array_values如下所示：

 print_r(

    array_values(

      array_replace_recursive(

             array_column($a, null, 'product_id'),

             array_column($b, null, 'product_id')

      )

    )

 );

-注意- product_ids 在每个数组中必须是唯一的，这样才能工作。否则，您可以简单地使用 foreach 循环来完成。

$c = [];

foreach(array_merge($a,$b) as $v){

    $k = $v['product_id'];

    if(!isset($c[$k])){

        $c[$k] = $v;

    }else{

        $c[$k] = array_merge($c[$k],$v);

    }

}

print_r($c);

沙盒

我会发布输出，但它是相同的:) - 这就是重点。此外，我更喜欢尽可能少地引用这些键。它可以使维护代码更容易一些。