Question

$php -a
php > $data1 = ['tag' => 'div', 'classes' => [1,2,3]];
php > $data2 = ['tag' => 'section', 'classes' => [2,3,4,5,6]];
php > $result = array_merge_recursive($data1, $data2);
php > print_r($result);
Array
(
    [tag] => Array
        (
            [0] => div
            [1] => section
        )

    [classes] => Array
        (
            [0] => 1
            [1] => 2
            [2] => 3
            [3] => 2
            [4] => 3
            [5] => 4
            [6] => 5
            [7] => 6
        )

 )

正如Docs中描述的那样：

如果输入数组具有相同的字符串键，则这些键的值将合并为一个数组[...]

PHP中是否存在基本相同的现有函数，但没有将相同的键合并到数组中，以便重写值并保持键？

在这种情况下，我希望得到这样的结果：

Array
(
    [tag] => section

    [classes] => Array
        (
            [0] => 1
            [1] => 2
            [2] => 3
            [5] => 4
            [6] => 5
            [7] => 6
        )

 )

关于@JustOnUnderMillions的评论：

是的我想知道，这不是我对这种功能的期望，我希望得到一个结果，我正在寻找。

Answer 1

您可以处理此函数（递归和多数组）：

<?php

$data1 = ['tag' => 'div', 'classes' => [1,2,3], 'foo' => ['bar' => [1,2], 'bar2' => 'foo']];
$data2 = ['tag' => 'section', 'classes' => [2,3,4,5,6], 'foo' => ['bar' => [2,3], 'bar3' => 'foo']];
$data3 = ['tag' => 'section', 'classes' => [7], 'foo' => ['bar' => [5], 'bar3' => 'foo2']];


print_r(custom_array_merge($data1, $data2, $data3));

function custom_array_merge() {
    $arguments = func_get_args();
    $datas = call_user_func_array('array_merge', $arguments);
    foreach($datas as $key => $value) {
        if(is_array($value)) {
            $values = [];
            foreach($arguments as $array) {
                $values[] = isset($array[$key]) ? $array[$key] : [];
            }

            if(array_depth($value) === 1) {
                $datas[$key] = array_unique(call_user_func_array('array_merge', $values));
            }else {
                $datas[$key] = call_user_func_array('custom_array_merge', $values);
            }
        }
    }

    return $datas;
}

function array_depth(array $array) {
    $max_depth = 1;

    foreach ($array as $value) {
        if (is_array($value)) {
            $depth = array_depth($value) + 1;

            if ($depth > $max_depth) {
                $max_depth = $depth;
            }
        }
    }

    return $max_depth;
}

Answer 2

要获得结果，您需要使用：

function my_array_merge_recursive($array1,$array2){
   foreach($array1 as $key=>&$val){
       if(!isset($array2[$key])){
           contiune;
       }
       if(is_array($val)){
           $val = array_unique(array_merge($val,$array2[$key]));
       } else {
           $val=$array2[$key];
       }
       unset($array2[$key]);
   }
   #if we have entries left in second array
   if(count($array2)){
       return array_merge($array1,$array2);
   }
   return $array1;
}
$data1 = ['tag' => 'div', 'classes' => [1,2,3]];
$data2 = ['tag' => 'section', 'classes' => [2,3,4,5,6]];
$result = my_array_merge_recursive($data1, $data2);
print_r($result);

此功能仅适用于此特殊情况。

PHP-array_merge_recursive（） - 没有相同键的数组

2 个答案: