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如何比较包含用户详细信息的两个数组，并从一个数组中删除匹配的元素？

phparraysmultidimensional-arrayarray-difference
3
我有两个数组 $a 和 $b，它们都包含“用户详细信息”的数组。
以下是它的结构（即print_r()的输出）：
print_r($a);

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] => 1585
            [profile_page_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] => 
            [profile_image] => http://app.campusknot.com/file/pic/user/1585_100_square.jpg
    )

    [2] => 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
    )

    [3] => 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
    )

    [4] => Array
    (
            [user_id] => 244
            [profile_page_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] => 
            [profile_image] => http://app.campusknot.com/file/pic/user/244_100_square.cza
    ) 
)

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$a和$b，最后我想得到精简的数组$a，它不包含如下公共元素（数组键应从0开始，并持续增加1）。
print_r($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，我尝试了下面的代码，但是没有得到我期望的精细化输出结果。
//My attempted code
$a = $result=array_diff($a,$b);

我还尝试了array_diff_assoc()函数，但也没有给我想要的输出结果。
请问有人可以指导我如何获得所需的输出结果吗？
首先将它们合并，然后使用foreach循环创建一个新的数组，该数组包含您想要的值。 - devpro
@devpro：如果您能将您的代码作为答案发布，那将会更好，这样我就可以测试并接受它作为答案。您能做到吗？ - PHPFan
我已经更新了答案，其中包含唯一的值，并且索引从0开始。 - devpro
我假设问题已经解决了，我的朋友。 - devpro
3个回答
2

返回一个包含两个给定用户列表之间差异的数组。

1）给定两个数组：

  • 一个完整的用户列表($userListA)
  • 一个必需的用户列表($userListB)

生成一个数组，其中包含$userListA中存在但不在$userListB中的用户。

工作示例 - eval.in; 源代码 - pastebin

还有一种更有效率的版本，用于大型数组中会更快。它使用以user_id为键的数组，因此可以检查缺失而无需扫描整个数组。pastebin - 对比缺失用户的数组-快速版

代码如下:

/*
 * 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;
}

输出结果:
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);
0

你可以使用它，但根据你的数组更改索引，这只是一个解决问题的示例：

$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);

Result looks like:

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
        )

)

首先感谢您的帮助。我想澄清一件事，即我不希望在结果数组中有重复元素。您在答案中添加了用户ID为109的元素，实际上不应该添加，并且新数组中的键应该从0开始，并继续递增1。请您相应地修改您的答案。我认为您已经非常接近我需要的东西了。再次感谢，热切期待您的回复。 - PHPFan
好的，您正在寻找重新排列数组的答案。已更新@user2839497。 - devpro
结果数组中，常见的数组元素也不应重复出现。 - PHPFan
@user2839497：答案已更新，包含唯一值。 - devpro
你在 array_merge 后的代码中没有使用 $c？ - PHPFan
对不起，不需要合并它们，请忽略 $c，我已经删除了 - devpro
0
首先，我把 $output 赋值为 $a 中的所有元素。
然后，我将其与 $b 进行比较，并从 $output 中删除已存在的值。
    $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
            )    
    )
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