如何在 PHP 中合并两个对象数组

How to merge two arrays of object in PHP

提问by M. Ahmad Zafar

I have the following two arrays of objects:

我有以下两个对象数组：

First Array:$array1

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
        )
)

Second Array:$array2

第二个数组：$array2

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

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

I want to merge these two object arrays (removing all duplicates) and sorted according to id.

我想合并这两个对象数组（删除所有重复项）并根据id.

Desired output:

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
        )
)

回答by M. Ahmad Zafar

These 3 simple steps did the work:

这 3 个简单的步骤完成了工作：

//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 );

Note:Answer by @Kamran helped me come to this simple solution

注意：@Kamran 的回答帮助我找到了这个简单的解决方案

回答by Software Guy

UPDATE

更新

I am posting the entire code listing here now instead of the previously posted main code, printing both input and output. You can simply copy and paste this code to test.

我现在在这里发布整个代码清单，而不是以前发布的主要代码，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>";

it will output the following:

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
        )

)

回答by mickmackusa

Assignments:

作业：

1. Merge
2. Remove Duplicates
3. Sort by id

1. 合并
2. 删除重复项
3. 排序方式 id

The good news is: Assigning temporary keys using idvalues does all of the hard work for you.No serializing is needed.

好消息是：使用id值分配临时键可以为您完成所有艰苦的工作。不需要序列化。

• array_merge()joins the arrays together.
• array_column()with a null2nd parameter leaves the objects unmodified and idas the 3rd parameter assigns the temporary keys. Because arrays cannot have duplicate keys, duplicate objects are weeded out in this step.
• Now that we have keys, ksort()avoids calling the more convoluted usort()to sort by idascending.
• Finally, call array_values()to re-index the resultant array (remove the temporary keys).

• array_merge()将数组连接在一起。
• array_column()使用null第二个参数使对象保持不变，而id作为第三个参数分配临时键。因为数组不能有重复的键，所以在这一步中会淘汰重复的对象。
• 现在我们有了键，ksort()避免调用更复杂的usort()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）。

Code: (Demo)

代码：（演示）

$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));

Output:

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
        )    
)