php - 通过匹配子数组值合并 2 个关联数组？

Question

我需要通过键合并这两个数组aa =>“value”

$array1 = array(
    "aa" => array("RM","PR","LE"),
    "bb" => array("100a","200a","300a"),
    "cc" => array("1.99b","2.99b","3.99b")
);

第二个数组的每个键可能有额外的值，请注意本例中“aa”键中的“ST”值。

$array2 = array(
    "aa" => array("RM","PR","ST","LE"),
    "dd"  => array("UK","UK","UK","UK"),
    "ee" => array("123","456","000","789")
);

最终成为像这样的 1 个数组。

$final_array = array(
    "aa" => array("RM","PR","ST","LE"),
    "bb" => array("100a","200a",null,"300a"),
    "cc" => array("1.99b","2.99b",null,"3.99b")
    "dd"  => array("UK","UK","UK","UK"),
    "ee" => array("123","456","000","789"),
);

在相应位置产生空值。 它需要像 MySQL 连接一样进行处理，array_merge() 和 array_merge_recursive() 将不起作用。 大家有什么想法吗？提前致谢。

Answer 1

假设 $array2 始终大于 $array1 并且数组计数的差值等于 1，并且比较是在键 'aa'< 之间进行的

// Get keys of each array, then merge, then get unique
$all_keys = array_unique(array_merge(array_keys($array1), array_keys($array2)));
// Get difference of 'aa' then the key
$diff_key = key(array_diff($array2['aa'], $array1['aa']));
// Set `$final_array` as equal to `$array1`
$final_array = $array1;
// Loop thru each keys
foreach ($all_keys as $key) {
    // Check if `$array1` has the key
    if (isset($array1[$key])) {
        // Check if `$array2` also has the key
        if (isset($array2[$key])) {
            // Splice array to add element of `$array2` to final array
            array_splice($final_array[$key], $diff_key, 0, $array2[$key][$diff_key]);
        } else {
            // Splice array to add empty element
            array_splice($final_array[$key], $diff_key, 0, '');
        }
    } else {
        // Add `$array2` element to `$final_array`
        $final_array[$key] = $array2[$key];
    }
}


print_r($final_array);