22

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
        )
)

我想合并这两个对象数组（删除所有重复项）并根据id.

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
        )
)
4

3 回答 3

36

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 );

注意： @Kamran 的回答帮助我找到了这个简单的解决方案

于 2012-08-09T08:30:10.853 回答
4

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
        )

)
于 2012-08-09T06:37:41.803 回答
1

Assignments:

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

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

  • array_merge() joins the arrays together.
  • array_column() with a null 2nd parameter leaves the objects unmodified and id as 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 id ascending.
  • Finally, call array_values() to re-index the resultant array (remove the temporary keys).

Code: (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));

Output:

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
        )    
)
于 2018-07-10T05:35:11.900 回答