php - Array PHP，检查是否存在多个元素到另一个数组

Question

我有一个问题:

我有两个数组，一个是静态的，一个可以由用户更新...我想检查静态数组中的每个 id 是否存在另一个数组的 id，如果存在，则做一些事情，如果不存在(完成检查时)传递给其他 ID 等...

现在，数组是这些:

用户数组(用户解锁2个成就):

Array (
  [0] => Array (
    [data] => Array (
      [importance] => 0
      [achievement] => Array (
        [id] => 644081262362202
        [title] => Achievement 2
        [type] => game.achievement
        [url] => http://www.***.com/achievements/achievement2.html
      )
    )
    [id] => 104693166566570
  )
  [1] => Array (
    [data] => Array (
      [importance] => 0
      [achievement] => Array (
        [id] => 968802826528055
        [title] => Achievement 1
        [type] => game.achievement
        [url] => http://www.***.com/achievements/achievement1.html
      )
    )
    [id] => 104023386633548
  )
) 

静态数组(保存了 6 个成就):

Array (
  [0] => Array (
    [data] => Array (
      [points] => 50
    )
    [description] => you unlock the achievement2
    [title] => Achievement 2
    [id] => 644081262362202
  )
  [1] => Array (
    [data] => Array (
      [points] => 50
    )
    [description] => you unlock the achievement3
    [title] => Achievement 3
    [id] => 912599152147444
  )
  [2] => Array (
    [data] => Array (
      [points] => 50
    )
    [description] => you unlock the achievement5
    [title] => Achievement 5
    [id] => 913757345379232
  )
  [3] => Array (
    [data] => Array (
      [points] => 50
    )
    [description] => you unlock the achievement6
    [title] => Achievement 6
    [id] => 921989084564878
  )
  [4] => Array (
    [data] => Array (
      [points] => 50
    )
    [description] => you unlock the achievement1
    [title] => Achievement 1
    [id] => 968802826528055
  )
  [5] => Array (
    [data] => Array (
      [points] => 50
    )
    [description] => you unlock the achievement4
    [title] => Achievement 4
    [id] => 1149671038394021
  )
) 

现在，我使用这个脚本来回显如图所示的最终输出(结果是静态数组):

if (empty($results)) {
  //echo 'noAchievement for the app';
} else {
  foreach ($results as $result) {
    $totalAchievementsApp .= ' [["' . "0" .'"],["'.$result[id] .'"],["'. $result[title] .'"],["'. $result[data][points]."]] ";
  }
}

现在，我该怎么做才能检查这个脚本？我知道我必须在 else 中添加另一个 if 来检查 ID 是否 = 到其他 ID，但我不知道如何，我有点困惑......我想检查静态数组存在于另一个数组中，如果存在，则执行:

**$totalAchievementsApp .= ' [["' . "1" .'"],["'.$result[id] .'"],["'. $result[title] .'"],["'. $result[data][points]."]] ";**

非常感谢:)

Answer 1

如果我没理解错的话，您想为静态数组中的每个条目指示其 ID 是否存在于用户数组中。

您可以使用 array_column 生成用户数组中所有 ID 的数组。然后使用 in_array 检查每个静态 ID 是否存在于该数组中。如果找到，则将值设置为 1，如果未找到，则设置为 0。

为了示例，我生成了一个新的最终输出数组。但是您可以将“找到的”值添加到静态数组的每个条目。

<?php

$static=array(
    array('point'=>50,'title'=>'TITLE 1','id'=>54632),
    array('point'=>50,'title'=>'TITLE 2','id'=>54344),
    array('point'=>50,'title'=>'TITLE 3','id'=>34225),
    array('point'=>50,'title'=>'TITLE 4','id'=>2323245),
    array('point'=>50,'title'=>'TITLE 5','id'=>23872445),
);
$user=array(
    array('id'=>2323245,'title'=>'TITLE 1','point'=>50),
    array('id'=>54344,'title'=>'TITLE 2','point'=>50),
    array('id'=>34225,'title'=>'TITLE 3','point'=>50)
);

$final=array();

foreach ($static as $entry) {
    $final[]=array(
        'found'=>in_array($entry['id'],array_column($user,'id'))?1:0,
        'id'=>$entry['id'],
        'title'=>$entry['title'],
        'point'=>$entry['point']
    );
}

echo"<pre>".print_r($final,true)."</pre>";

根据您的数据，输出为:

Array
(
    [0] => Array
        (
            [found] => 0
            [id] => 54632
            [title] => TITLE 1
            [point] => 50
        )

    [1] => Array
        (
            [found] => 1
            [id] => 54344
            [title] => TITLE 2
            [point] => 50
        )

    [2] => Array
        (
            [found] => 1
            [id] => 34225
            [title] => TITLE 3
            [point] => 50
        )

    [3] => Array
        (
            [found] => 1
            [id] => 2323245
            [title] => TITLE 4
            [point] => 50
        )

    [4] => Array
        (
            [found] => 0
            [id] => 23872445
            [title] => TITLE 5
            [point] => 50
        )

)

---

编辑

考虑到实际数组的结构更复杂，我嵌套了几个 array_column 函数来访问用户数组中更深层次的“data > achievement > id”键:

$user_achvmts=array_column(array_column(array_column($user,'data'),'achievement'),'id');

请看下面的例子:

// initialize the "static" and "user" arrays

$static=array (
  0 => array(
    'data' => array(
      'points' => 50
    ),
    'description' => 'you unlock the achievement2',
    'title' => 'Achievement 2',
    'id' => 644081262362202
  ),
  1 => array(
    'data' => array(
      'points' => 50
    ),
    'description' => 'you unlock the achievement3',
    'title' => 'Achievement 3',
    'id' => 912599152147444
  ),
  2 => array(
    'data' => array(
      'points' => 50
    ),
    'description' => 'you unlock the achievement5',
    'title' => 'Achievement 5',
    'id' => 913757345379232
  ),
  3 => array(
    'data' => array(
      'points' => 50
    ),
    'description' => 'you unlock the achievement6',
    'title' => 'Achievement 6',
    'id' => 921989084564878
  ),
  4 => array(
    'data' => array(
      'points' => 50
    ),
    'description' => 'you unlock the achievement1',
    'title' => 'Achievement 1',
    'id' => 968802826528055
  ),
  5 => array(
    'data' => array(
      'points' => 50
    ),
    'description' => 'you unlock the achievement4',
    'title' => 'Achievement 4',
    'id' => 1149671038394021
  )
);

$user=array(
  0=>array(
    'data' => array(
      'importance' => 0,
      'achievement' => array (
        'id' => 644081262362202,
        'title' => 'Achievement 2',
        'type' => 'game.achievement',
        'url' => 'http://www.***.com/achievements/achievement2.html'
      )
    ),
    'id' => 104693166566570
  ),
  1 => array (
    'data' => array (
      'importance' => 0,
      'achievement' => array (
        'id' => 968802826528055,
        'title' => 'Achievement 1',
        'type' => 'game.achievement',
        'url' => 'http://www.***.com/achievements/achievement1.html'
      )
    ),
    'id' => 104023386633548
  )
);

// build array of user achievement IDs
$user_achvmts=array_column(array_column(array_column($user,'data'),'achievement'),'id');

// generate final array, with "found" values
$final=array();

foreach ($static as $entry) {
    $final[]=array(
        'found'=>in_array($entry['id'],$user_achvmts)?1:0,
        'id'=>$entry['id'],
        'title'=>$entry['title'],
        'description'=>$entry['description'],
        'points'=>$entry['data']['points']
    );
}

echo"<pre>".print_r($final,true)."</pre>";

结果是:

Array
(
    [0] => Array
        (
            [found] => 1
            [id] => 644081262362202
            [title] => Achievement 2
            [description] => you unlock the achievement2
            [points] => 50
        )

    [1] => Array
        (
            [found] => 0
            [id] => 912599152147444
            [title] => Achievement 3
            [description] => you unlock the achievement3
            [points] => 50
        )

    [2] => Array
        (
            [found] => 0
            [id] => 913757345379232
            [title] => Achievement 5
            [description] => you unlock the achievement5
            [points] => 50
        )

    [3] => Array
        (
            [found] => 0
            [id] => 921989084564878
            [title] => Achievement 6
            [description] => you unlock the achievement6
            [points] => 50
        )

    [4] => Array
        (
            [found] => 1
            [id] => 968802826528055
            [title] => Achievement 1
            [description] => you unlock the achievement1
            [points] => 50
        )

    [5] => Array
        (
            [found] => 0
            [id] => 1149671038394021
            [title] => Achievement 4
            [description] => you unlock the achievement4
            [points] => 50
        )

)

请注意，array_column 仅在 PHP >= 5.5.0 中可用。对于旧版本，请参阅 Recommended userland implementation for PHP lower than 5.5 。

作为 array_column 的替代方案，您可以使用 array_map 构建用户 ID 数组:

$user_achvmts = array_map( function($v) {return $v['data']['achievement']['id'];}, $user);

或者甚至只是遍历用户数组:

$user_achvmts=[];
foreach ($user as $v) { $user_achvmts[]=$v['data']['achievement']['id']; }