循環時向數組添加字段和值？

Question

我有以下 2 arrays，我需要根據第二個的 ID 值添加第一個的值作為鍵，以便我可以訂購第二個數組 DESC：

觀看次數：

Array ( [1851] => 12 [14341] => 7 [17834] => 3 )

我有以下數組 object：

$most_seen_list：

Array ( 
    [0] => WP_Post Object ( 
            [ID] => 17834 
            [post_date] => 2021-10-20 16:01:50 
            [post_date_gmt] => 2021-10-20 21:01:50 
        )
    [1] => WP_Post Object ( 
            [ID] => 14341 
            [post_date] => 2021-06-01 17:57:00 
            [post_date_gmt] => 2021-06-01 22:57:00 
        )
    [2] => WP_Post Object ( 
            [ID] => 1851
            [post_date] => 2021-02-13 18:09:00 
            [post_date_gmt] => 2021-02-13 23:09:00 
        )
)

與下一個 foreach 我正在經歷它，我想改變[0]..[1]..[3] 具有我從另一個數組中獲得的值的鍵：

foreach ($most_seen_list as $key => $value) {
    $newResult[$value->ID];
}

預期 output：

Array ( 
    [12] => WP_Post Object ( 
            [ID] => 1851
            [post_date] => 2021-02-13 18:09:00 
            [post_date_gmt] => 2021-02-13 23:09:00 
            )
    [7] => WP_Post Object ( 
            [ID] => 14341 
            [post_date] => 2021-06-01 17:57:00 
            [post_date_gmt] => 2021-06-01 22:57:00 
        )
    [3] => WP_Post Object ( 
            [ID] => 17834 
            [post_date] => 2021-10-20 16:01:50 
            [post_date_gmt] => 2021-10-20 21:01:50 
        )
)

Answer 1

我假設您已經對$views數組進行了排序。 因此，您需要使用內部循環處理每個$most_seen_list對象數組以找到正確的對象

$views = Array ( 1851 => 12, 14341 => 7, 17834 => 3 );
$most_seen_list = Array ( 
    (Object) [ 'ID' => 17834,'post_date' => '2021-10-20 16:01:50', 'post_date_gmt' => '2021-10-20 21:01:50',
    ],
    (Object) [ 'ID' => 14341, 'post_date' => '2021-06-01 17:57:00', 'post_date_gmt' => '2021-06-01 22:57:00'
    ],
    (Object) ['ID' => 1851, 'post_date' => '2021-02-13 18:09:00', 'post_date_gmt' => '2021-02-13 23:09:00' 
    ]
);

$new = [];
//get the ID'2 in the predefined order set in $views
foreach ( $views as $key=>$val) {
    // for each view find the correct object in $most_seen_list
    foreach( $most_seen_list as $obj) {
        if ( $obj->ID == $key ) {
            $new[$val] = $obj;
            break;  // terminate this iteration
        }
    }
}

print_r($new);

結果

Array
(
    [12] => stdClass Object
        (
            [ID] => 1851
            [post_date] => 2021-02-13 18:09:00
            [post_date_gmt] => 2021-02-13 23:09:00
        )

    [7] => stdClass Object
        (
            [ID] => 14341
            [post_date] => 2021-06-01 17:57:00
            [post_date_gmt] => 2021-06-01 22:57:00
        )

    [3] => stdClass Object
        (
            [ID] => 17834
            [post_date] => 2021-10-20 16:01:50
            [post_date_gmt] => 2021-10-20 21:01:50
        )

)

Answer 2

如果您不需要查看量作為鍵（如果某些查看量無論如何都相同，這可能會出現問題），您可以使用以下內容以正確的順序對帖子進行排序。

// sort asc on views
usort($most_seen_list, function($postA, $postB) use ($views) {
    return $views[$postA->ID] <=> $views[$postB->ID];
});
$most_seen_list = array_reverse($most_seen_list); // reverse the order, so most viewed is first

在此之后，您仍然可以使用以下方法獲取每個帖子的視圖：

$views[$oneOfThePosts->ID];