如何比较两个包含用户详细信息的数组作为数组并从一个数组中删除匹配的元素？

Question

我有两个数组 $a 和 $b，数组中包含 'user details'。

结构如下（即print_r()的输出）

第二个数组如下：

print_r($b);


Array
(
    [0] => Array
        (
            [user_id] => 244
            [profile_page_id] => 0
            [user_server_id] => 0
            [user_name] => profile-244
            [full_name] => Hiten Patel
            [gender] => 2
            [user_image] => 244%s.cza
            [is_invisible] => 0
            [user_group_id] => 7
            [language_id] => 
        )

    [1] => Array
        (
            [user_id] => 1585
            [profile_page_id] => 0
            [user_server_id] => 0
            [user_name] => profile-1585
            [full_name] => Sushil Kadam
            [gender] => 0
            [user_image] => 1585%s.jpg
            [is_invisible] => 0
            [user_group_id] => 7
            [language_id] => 
        )

)

现在我想比较两个数组$a and $b，最后我想要精炼的数组$a，它不会包含如下常见的数组元素（数组键应该从0开始并不断增加1).

print_r($a); //after refinement, the desired output array

Array
(
    [0] => Array
        (
            [user_id] => 109
            [profile_page_id] => 0
            [user_name] => profile-109
            [full_name] => Hiten Patel
            [gender] => 0
            [user_image] => 
            [is_invisible] => 0
            [user_group_id] => 6
            [language_id] => 
            [profile_image] => http://app.campusknot.com/theme/frontend/foxplus/style/default/image/noimage/profile_100.png
        )
    [1] => Array
        (
            [user_id] => 185
            [profile_page_id] => 0
            [user_name] => profile-185
            [full_name] => Perceus Mody
            [gender] => 1
            [user_image] => 185%s.peg
            [is_invisible] => 0
            [user_group_id] => 6
            [language_id] => 
            [profile_image] => http://app.campusknot.com/file/pic/user/185_100_square.peg
        )
    [2] => Array
        (
            [user_id] => 196
            [profile_page_id] => 0
            [user_name] => profile-196
            [full_name] => Ira Hampton
            [gender] => 1
            [user_image] => 2014/11/24c4a6835e667b67b82cea3666841ac7%s.jpg
            [is_invisible] => 0
            [user_group_id] => 6
            [language_id] => 
            [profile_image] => http://app.campusknot.com/theme/frontend/foxplus/style/default/image/noimage/profile.png
        )    
)

为了实现这个期望的输出结果，我尝试了以下代码，但无法获得我预期的期望的精细输出结果。

//My attempted code
$a = $result=array_diff($a,$b);

我也试过 array_diff_assoc() 函数，但也没有给我想要的输出结果。

有人可以在这方面指导我以获得所需的输出结果吗？

Answer 1

您可以使用它，但根据您的数组更改索引，这只是一个示例，您如何解决您的问题：

$a = array(
        array('userid'=>109,
            'profile_img'=>0,
            'username'=>'test',
            'lang'=>0),
        array('userid'=>10,
            'profile_img'=>0,
            'username'=>'test2',
            'lang'=>0),
        array('userid'=>101,
            'profile_img'=>0,
            'username'=>'test',
            'lang'=>0),
        );
$b = array(
        array('userid'=>100,
            'profile_img'=>0,
            'username'=>'test',
            'lang'=>0),
        array('userid'=>1011,
            'profile_img'=>0,
            'username'=>'test2',
            'lang'=>0),
        array('userid'=>101,
            'profile_img'=>0,
            'username'=>'test',
            'lang'=>0),
        );



$newArr1 = array();

foreach ($a as $key => $value) {
    $newArr1[$value['userid']] = $value;    
}

foreach ($b as $key => $value) {
    $newArr2[$value['userid']] = $value;    
}
echo "<pre>";
$diffArr1 = array_diff_key($newArr1, $newArr2);
$diffArr2 = array_diff_key($newArr2, $newArr1);

$finalArr = array_merge($diffArr1,$diffArr2);
print_r($finalArr);

结果如下：

Array
(
    [0] => Array
        (
            [userid] => 109
            [profile_img] => 0
            [username] => test
            [lang] => 0
        )

    [1] => Array
        (
            [userid] => 10
            [profile_img] => 0
            [username] => test2
            [lang] => 0
        )

    [2] => Array
        (
            [userid] => 100
            [profile_img] => 0
            [username] => test
            [lang] => 0
        )

    [3] => Array
        (
            [userid] => 1011
            [profile_img] => 0
            [username] => test2
            [lang] => 0
        )

)

Answer 2

首先我给 $output $a 以获得 $a

中的所有元素

之后我将它与 $b 进行比较并删除 $output

中存在的值

    $output = $a;
    foreach ($b as $k => $v) {
        $exists = false;
        foreach($output as $key => $value) {
            if ($v == $value) {
                unset($output[$key]);
                $exists = true;
                break;
            } else {
                continue;
            }
        } 
        if (!$exists) {
            $output[] = $v;
        }
    }
    echo '<pre>';
    print_r($output);
    echo '</pre>';

结果

    Array
    (
        [0] => Array
            (
                [user_id] => 109
                [profile_page_id] => 0
                [user_name] => profile-109
                [full_name] => Hiten Patel
                [gender] => 0
                [user_image] => 
                [is_invisible] => 0
                [user_group_id] => 6
                [language_id] => 
                [profile_image] => http://app.campusknot.com/theme/frontend/foxplus/style/default/image/noimage/profile_100.png
            )
        [1] => Array
            (
                [user_id] => 185
                [profile_page_id] => 0
                [user_name] => profile-185
                [full_name] => Perceus Mody
                [gender] => 1
                [user_image] => 185%s.peg
                [is_invisible] => 0
                [user_group_id] => 6
                [language_id] => 
                [profile_image] => http://app.campusknot.com/file/pic/user/185_100_square.peg
            )
        [2] => Array
            (
                [user_id] => 196
                [profile_page_id] => 0
                [user_name] => profile-196
                [full_name] => Ira Hampton
                [gender] => 1
                [user_image] => 2014/11/24c4a6835e667b67b82cea3666841ac7%s.jpg
                [is_invisible] => 0
                [user_group_id] => 6
                [language_id] => 
                [profile_image] => http://app.campusknot.com/theme/frontend/foxplus/style/default/image/noimage/profile.png
            )    
    )

Answer 3

Return 包含两个提供的用户列表之间差异的数组。

1) 给定两个数组：

完整的用户列表 ($userListA)
必需的用户列表 ($userListB)

生成一个数组，其中包含 $userListA 中但不 $userListB 中的用户。

working example - eval.in; Source code - pastebin

有一个更高效的版本，在大型数组中速度会更快。它在 user_id 上使用数组 'keyed'，因此无需扫描所有数组即可检查是否丢失。 pastebin - compare array for missing user - quick

代码：

/*
 * This version is simple but will be slow for large arrays...
 *
 * Hmm... I may want to do a more efficient version later,  so I will use a
 *        compare function now, so that I can easily change it later.
 */

/*
 * Out Array:
 *    1) In $userListA but not in $userListB
 */
$diffAfromB = array();

// check the input user list...
foreach ($userListA as $userA) {

    // find the userA details in Array B
    if (!matchUserAinB($userA, $userListB)) {
        $diffAfromB[] = $userA;
    }
}

// show otput...
var_dump($diffAfromB);

exit;

// -------------------------------------------------------------------------
/**
 * Check if userA exists in userListB
 *
 * @param array $userA
 * @param array $userListB
 * @return boolean
 */
function matchUserAinB($userA, array $userListB)
{
    $found = false;

    foreach ($userListB as $userB) {
        if ($userB['user_id'] === $userA['user_id']) {
            $found = true;
            break;
        }
    }
    return $found;
}

输出：

array
  0 => 
    array
      'user_id' => string '109' (length=3)
      'profile_page_id' => string '0' (length=1)
      'user_name' => string 'profile-109' (length=11)
      'full_name' => string 'Hiten Patel' (length=11)
      'gender' => string '0' (length=1)
      'user_image' => string '\"\"' (length=4)
      'is_invisible' => string '0' (length=1)
      'user_group_id' => string '6' (length=1)
      'language_id' => string '0' (length=1)
      'profile_image' => string 'http://app.campusknot.com/theme/frontend/foxplus/style/default/image/noimage/profile_100.png' (length=92)
  1 => 
    array
      'user_id' => string '185' (length=3)
      'profile_page_id' => string '0' (length=1)
      'user_name' => string 'profile-185' (length=11)
      'full_name' => string 'Perceus Mody' (length=12)
      'gender' => string '1' (length=1)
      'user_image' => string '185%s.peg' (length=9)
      'is_invisible' => string '0' (length=1)
      'user_group_id' => string '6' (length=1)
      'language_id' => string '0' (length=1)
      'profile_image' => string 'http://app.campusknot.com/file/pic/user/185_100_square.peg' (length=58)
  2 => 
    array
      'user_id' => string '196' (length=3)
      'profile_page_id' => string '0' (length=1)
      'user_name' => string 'profile-196' (length=11)
      'full_name' => string 'Ira Hampton' (length=11)
      'gender' => string '1' (length=1)
      'user_image' => string '2014/11/24c4a6835e667b67b82cea3666841ac7%s.jpg' (length=46)
      'is_invisible' => string '0' (length=1)
      'user_group_id' => string '6' (length=1)
      'language_id' => string '0' (length=1)
      'profile_image' => string 'http://app.campusknot.com/theme/frontend/foxplus/style/default/image/noimage/profile.png' (length=88)

测试数据：

$sA = 'a:5:{i:0;a:10:{s:7:"user_id";s:3:"109";s:15:"profile_page_id";s:1:"0";s:9:"user_name";s:11:"profile-109";s:9:"full_name";s:11:"Hiten Patel";s:6:"gender";s:1:"0";s:10:"user_image";s:4:"\"\"";s:12:"is_invisible";s:1:"0";s:13:"user_group_id";s:1:"6";s:11:"language_id";s:1:"0";s:13:"profile_image";s:92:"http://app.campusknot.com/theme/frontend/foxplus/style/default/image/noimage/profile_100.png";}i:1;a:10:{s:7:"user_id";s:4:"1585";s:15:"profile_page_id";s:1:"0";s:9:"user_name";s:12:"profile-1585";s:9:"full_name";s:12:"Sushil Kadam";s:6:"gender";s:1:"0";s:10:"user_image";s:10:"1585%s.jpg";s:12:"is_invisible";s:1:"0";s:13:"user_group_id";s:1:"7";s:11:"language_id";s:1:"0";s:13:"profile_image";s:59:"http://app.campusknot.com/file/pic/user/1585_100_square.jpg";}i:2;a:10:{s:7:"user_id";s:3:"185";s:15:"profile_page_id";s:1:"0";s:9:"user_name";s:11:"profile-185";s:9:"full_name";s:12:"Perceus Mody";s:6:"gender";s:1:"1";s:10:"user_image";s:9:"185%s.peg";s:12:"is_invisible";s:1:"0";s:13:"user_group_id";s:1:"6";s:11:"language_id";s:1:"0";s:13:"profile_image";s:58:"http://app.campusknot.com/file/pic/user/185_100_square.peg";}i:3;a:10:{s:7:"user_id";s:3:"196";s:15:"profile_page_id";s:1:"0";s:9:"user_name";s:11:"profile-196";s:9:"full_name";s:11:"Ira Hampton";s:6:"gender";s:1:"1";s:10:"user_image";s:46:"2014/11/24c4a6835e667b67b82cea3666841ac7%s.jpg";s:12:"is_invisible";s:1:"0";s:13:"user_group_id";s:1:"6";s:11:"language_id";s:1:"0";s:13:"profile_image";s:88:"http://app.campusknot.com/theme/frontend/foxplus/style/default/image/noimage/profile.png";}i:4;a:10:{s:7:"user_id";s:3:"244";s:15:"profile_page_id";s:1:"0";s:9:"user_name";s:11:"profile-244";s:9:"full_name";s:11:"Hiten Patel";s:6:"gender";s:1:"2";s:10:"user_image";s:9:"244%s.cza";s:12:"is_invisible";s:1:"0";s:13:"user_group_id";s:1:"7";s:11:"language_id";s:1:"0";s:13:"profile_image";s:58:"http://app.campusknot.com/file/pic/user/244_100_square.cza";}}';
$userListA = unserialize($sA);

$sB = 'a:2:{i:0;a:10:{s:7:"user_id";s:3:"244";s:15:"profile_page_id";s:1:"0";s:14:"user_server_id";s:1:"0";s:9:"user_name";s:11:"profile-244";s:9:"full_name";s:11:"Hiten Patel";s:6:"gender";s:1:"2";s:10:"user_image";s:9:"244%s.cza";s:12:"is_invisible";s:1:"0";s:13:"user_group_id";s:1:"7";s:11:"language_id";s:1:"0";}i:1;a:10:{s:7:"user_id";s:4:"1585";s:15:"profile_page_id";s:1:"0";s:14:"user_server_id";s:1:"0";s:9:"user_name";s:12:"profile-1585";s:9:"full_name";s:12:"Sushil Kadam";s:6:"gender";s:1:"0";s:10:"user_image";s:10:"1585%s.jpg";s:12:"is_invisible";s:1:"0";s:13:"user_group_id";s:1:"7";s:11:"language_id";s:1:"0";}}';
$userListB = unserialize($sB);

如何比较两个包含用户详细信息的数组作为数组并从一个数组中删除匹配的元素？

How to compare two arrays that contain user details as array and remove the matching elements from one array?

php

arrays

multidimensional-array

array-difference