动态创建新数组，用第一个数组的特殊值填充每个数组，然后获取它们的组合 [英] Dynamically create new Arrays, fill each with specials values from first array and than get combinations of them

问题描述

这个问题有点类似于我的

this question is a little bit similar to my old one here.

但是现在我只有一个动态填充的数组

But now I've got only one dynamically filled array

Array ( 
    [8] => 3-Blue
    [9] => 3-Red
    [10] => 4-L
    [11] => 4-XL
    ...
    ...
)

对于值前面的每个数字，我需要一个新数组.因此，对于此示例，我需要这两个

for each number in front of the value, I need a new array. So for this example I need these two

Array ( 
    [8] => Blue
    [9] => Red
)

Array (
    [10] => L
    [11] => XL
)

密钥应保持不变.如果无法做到这一点，则密钥应位于值 L-10

The key should stay the same. If this is not possible, than the keys should be in the value L - 10

而不是我需要组合这些数组，并在像这样的新数组中获得没有重复的可能组合.

than I need to combine those arrays, and get the possible combinations without duplicates in a new array like this.

Array (
    [0] => Blue | L - 8,10
    [1] => Blue | XL - 8,11
    [2] => Red | L - 9,10
    [3] => Red | XL - 9,11
)

每个值之后，之前必须有数组形式的键.

after each value, there must be the keys form the arrays before.

这甚至可能吗?如果可以，怎么办?

is this even possible?! and if yes, how?

推荐答案

您可以使用嵌套的 foreach($ arr as $ key => $ val)循环简单地迭代两个数组.
在这里，我使用 sprintf 函数而不是字符串连接，只是因为它使预期的输出格式更加清晰.

You can simply iterate both arrays using nested foreach ($arr as $key => $val) loop.
Here I use the sprintf function instead of string concatenation, simply because it makes the intended output format more clear.

$color_array = array(8 => "Blue", 9 => "Red");
$size_array  = array(10 => "L", 11 => "XL");

$result = array();

// For each key => value pair in the color array
foreach ($color_array as $color_key => $color) {

    // For each key => value pair in the size array
    foreach ($size_array as $size_key => $size) {

        // Generate the result string with "sprintf", then append it to the result array
        $result[] = sprintf("%s | %s - %d,%d", $color, $size, $color_key, $size_key);
    }
}

var_dump($result);
// array(4) {
//   [0]=> string(15) "Blue | L - 8,10"
//   [1]=> string(16) "Blue | XL - 8,11"
//   [2]=> string(14) "Red | L - 9,10"
//   [3]=> string(15) "Red | XL - 9,11"
// }

您可以使用 array_unique 对结果数组进行重复数据删除.但是，如果两个输入数组都是唯一的，那么您的输出集也应该是唯一的.

You can dedupe the result array using array_unique. However, if both of your input arrays are unique, your output set should be unique as well.

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