如何在 PHP 中合并两个对象数组

Question

我有以下两个对象数组：

第一个数组： $array1

Array
(
    [0] => stdClass Object
        (
            [id] => 100
            [name] => Muhammad
        )

    [1] => stdClass Object
        (
            [id] => 102
            [name] => Ibrahim
        )

    [2] => stdClass Object
        (
            [id] => 101
            [name] => Sumayyah
        )
)

第二个数组： $array2

Array
(
    [0] => stdClass Object
        (
            [id] => 100
            [name] => Muhammad
        )

    [1] => stdClass Object
        (
            [id] => 103
            [name] => Yusuf
        )
)

我想将这两个对象数组合并（去除所有重复项）并按照id排序。

期望的输出：

Array
(
    [0] => stdClass Object
        (
            [id] => 100
            [name] => Muhammad
        )

    [1] => stdClass Object
        (
            [id] => 101
            [name] => Sumayyah
        )

    [2] => stdClass Object
        (
            [id] => 102
            [name] => Ibrahim
        )

    [3] => stdClass Object
        (
            [id] => 103
            [name] => Yusuf
        )
)

Answer 1

这 3 个简单的步骤就完成了工作：

//both arrays will be merged including duplicates
$result = array_merge( $array1, $array2 );
//duplicate objects will be removed
$result = array_map("unserialize", array_unique(array_map("serialize", $result)));
//array is sorted on the bases of id
sort( $result );

注意：@Kamran 的回答帮助我找到了这个简单的解决方案

Answer 2

更新

我现在在这里发布整个代码列表，而不是之前发布的主代码，打印输入和输出。您可以简单地复制并粘贴此代码进行测试。

<?php

function array_to_object($arr) {
    $arrObject = array();
    foreach ($arr as $array) {
        $object = new stdClass();
        foreach ($array as $key => $value) {
            $object->$key = $value;
        }
        $arrObject[] = $object;
    }

    return $arrObject;
}

function super_unique($array)
{
    $result = array_map("unserialize", array_unique(array_map("serialize", $array)));
    foreach ($result as $key => $value)  {
        if ( is_array($value) ) {
          $result[$key] = super_unique($value);
        }
    }
    return $result;
}

function merge_arrays($arr1, $arr2) {
    $arr1 = (array)$arr1;
    $arr2 = (array)$arr2;
    $output = array_merge($arr1, $arr2);
    sort($output);
    return super_unique($output);
}

$array1 = array(
        array("id" => "100", "name" => "muhammad"), 
        array("id" => "102", "name" => "ibrahim"), 
        array("id" => "101", "name" => "summayyah"), 
    );
$array1 = array_to_object($array1);

print "<h3>Your array 1</h3>";
print "<pre>";
print_r($array1);
print "</pre>";

$array2 = array(
        array("id" => "100", "name" => "muhammad"), 
        array("id" => "103", "name" => "yusuf"), 
    );
$array2 = array_to_object($array2);

print "<h3>Your array 2</h3>";
print "<pre>";
print_r($array2);
print "</pre>";

$result = merge_arrays($array1, $array2);

print "<h3>Your desired output</h3>";
print "<pre>";
print_r($result);
print "</pre>";

它将输出以下内容：

Your array 1
Array
(
    [0] => stdClass Object
        (
            [id] => 100
            [name] => muhammad
        )

    [1] => stdClass Object
        (
            [id] => 102
            [name] => ibrahim
        )

    [2] => stdClass Object
        (
            [id] => 101
            [name] => summayyah
        )

)

Your array 2
Array
(
    [0] => stdClass Object
        (
            [id] => 100
            [name] => muhammad
        )

    [1] => stdClass Object
        (
            [id] => 103
            [name] => yusuf
        )

)

Your desired output
Array
(
    [0] => stdClass Object
        (
            [id] => 100
            [name] => muhammad
        )

    [2] => stdClass Object
        (
            [id] => 101
            [name] => summayyah
        )

    [3] => stdClass Object
        (
            [id] => 102
            [name] => ibrahim
        )

    [4] => stdClass Object
        (
            [id] => 103
            [name] => yusuf
        )

)

Answer 3

作业：

1. 合并
2. 删除重复项
3. 按id排序

好消息是：使用id 值分配临时键为您完成了所有艰苦的工作。不需要序列化。

• array_merge() 将数组连接在一起。
• array_column() 和 null 第二个参数保持对象不变，id 作为第三个参数分配临时键。因为数组不能有重复的键，所以在这一步会剔除重复的对象。
• 现在我们有了键，ksort() 避免调用更复杂的usort() 来按id 升序排序。
• 最后，调用array_values() 重新索引结果数组（删除临时键）。

代码：(Demo)

$array1 = [
    (object) ['id' => 100, 'name' => 'Muhammad'],
    (object) ['id' => 102, 'name' => 'Ibrahim'],
    (object) ['id' => 101, 'name' => 'Sumayyah']
];

$array2 = [
    (object) ['id' => 100, 'name' => 'Muhammad'],
    (object) ['id' => 103, 'name' => 'Yusuf']
];

$merged_keyed = array_column(array_merge($array1,$array2), NULL, 'id');
ksort($merged_keyed);
print_r(array_values($merged_keyed));

输出：

Array
(
    [0] => stdClass Object
        (
            [id] => 100
            [name] => Muhammad
        )    
    [1] => stdClass Object
        (
            [id] => 101
            [name] => Sumayyah
        )    
    [2] => stdClass Object
        (
            [id] => 102
            [name] => Ibrahim
        )    
    [3] => stdClass Object
        (
            [id] => 103
            [name] => Yusuf
        )    
)