从一个多维数组中取值并根据第一个键的匹配值将其放入另一个多维数组

Question

我有两个数组，$full_list 和 $only_titles，它们的值根据第一个键匹配。

$full_list：

Array
(
    [0] => Array
        (
            [0] => samsung-a40 
            [1] => Samsung A40 Phone
            [2] => 
            [3] => 21
            [4] => 334234
            [5] => 0          
        )

    [1] => Array
        (
            [0] => samsung-a72
            [1] => Galaxy A72 Phone
            [2] => 
            [3] => 230
            [4] => 239049
            [5] => 0    
        )
    [2] => Array
        (
            [0] => lg-k61
            [1] => LG K61 Phone 
            [2] => 
            [3] => 22
            [4] => 249582
            [5] => 0    
        )


  etc...

$only_titles:

Array
(
    [0] => Array
        (
            [0] => samsung-a40 
            [1] => Black Phone Case For Samsung A40               
        )

    [1] => Array
        (
            [0] => lg-k61
            [1] => Red Case LG K61 Phone            
        )

    [2] => Array
        (
            [0] => samsung-a72
            [1] => Folding Phone Case for Galaxy A72 Phone          
        )
   
  etc...

我想从 $only_title 数组（它的基本长产品标题）中获取第二个键的值并将其替换为 $full_list 数组：

$final_result:

Array
(
    [0] => Array
        (
            [0] => samsung-a40
            [1] => Black Phone Case For Samsung A40   // title from $only_titles
            [2] => 
            [3] => 21
            [4] => 334234
            [5] => 0          
        )

    [1] => Array
        (
            [0] => samsung-a72
            [1] => Folding Phone Case for Galaxy A72 Phone   // title from $only_titles     
            [2] => 
            [3] => 230
            [4] => 239049
            [5] => 0    
        )
    [2] => Array
        (
            [0] => lg-k61
            [1] => Red Case LG K61 Phone  // title from $only_titles
            [2] => 
            [3] => 22
            [4] => 249582
            [5] => 0    
        )
  etc...

我试过array_replace_recursive()，但问题是它期望子数组的顺序是相同的。但正如您在两个数组中看到的那样，第二个子数组不匹配。使用array_replace_recursive() 我得到第二个子数组错误：

[1] => Array
    (
        [0] => samsung-a72
        [1] => Red Case LG K61 Phone  // this is wrong
        [2] => 
        [3] => 230
        [4] => 239049
        [5] => 0    
    )

如何检查第一个键的值是否匹配？

Answer 1

您可以将array_map 和array_search 用于您的任务。

$items = array_map(function($item) use ($only_titles) {
  $index = array_search($item[0], array_column($only_titles, 0));
  if($index === false) return;

  $item[1] = $only_titles[$index][1]; 
  return $item;
}, $full_list);

array_map() 接受$full_list 并将每个项目迭代为$item,
然后对于每个项目，我们寻找与 array_search() 匹配的标题
它将返回来自$only_titles 的索引。
我们可以使用$index 来引用并将长标题分配给项目。

结果在$items

Answer 2

此脚本将帮助您解决问题

<?php

$full_array = [
    [
        'samsung-a40',
        'Samsung A40 Phone',
        null,
        21,
        334234,
        0,
    ],
    [
        'samsung-a72',
        'Galaxy A72 Phone',
        null,
        230,
        239049,
        0,
    ],
];

$only_titles = [
    [
        'samsung-a40',
        'Black Phone Case For Samsung A40',
    ],
    [
        'samsung-a72',
        'Red Case LG K61 Phone  ',
    ],
];

$formattedOnlyTitles = [];
foreach ($only_titles as $value) {
    $formattedOnlyTitles[$value[0]] = $value[1];
}

$fullArrayWithNewTitle = [];
foreach ($full_array as $value) {
    if (isset($formattedOnlyTitles[$value[0]])) {
        $value[1] = $formattedOnlyTitles[$value[0]];
    }

    $fullArrayWithNewTitle[] = $value;
}

print_r($fullArrayWithNewTitle);

输出

Array
(
    [0] => Array
        (
            [0] => samsung-a40
            [1] => Samsung A40 Phone
            [2] => 
            [3] => 21
            [4] => 334234
            [5] => 0
        )

    [1] => Array
        (
            [0] => samsung-a72
            [1] => Galaxy A72 Phone
            [2] => 
            [3] => 230
            [4] => 239049
            [5] => 0
        )
)

首先我更改了title_only var 的格式，以使其在下一个 foreach 中易于使用

$formattedOnlyTitles = [];
foreach ($only_titles as $value) {
    $formattedOnlyTitles[$value[0]] = $value[1];
}

在下一个 foreach 中，我只是用我的新格式化 title_only 数组检查标题

if (isset($formattedOnlyTitles[$value[0]])) {
    $value[1] = $formattedOnlyTitles[$value[0]];
}

如果我需要，然后更改标题