Question

以下是我的数组示例。每次user_id在数组中时，我都会尝试计数。每次user_id在数组中时，我都会尝试计数。

Array
(
[0] => Array
    (
        [user_id] => 57002892
        [page_id] => 109446562415595
    )

[1] => Array
    (
        [user_id] => 515576073
        [page_id] => 109446562415595
    )

[2] => Array
    (
        [user_id] => 560299932
        [page_id] => 109446562415595
    )

[3] => Array
    (
        [user_id] => 607960053
        [page_id] => 109446562415595
    )

[4] => Array
    (
        [user_id] => 607960053
        [page_id] => 109446562415595
    )
)

这应该输出以下内容：

Array
(
[0] => Array
    (
        [user_id] => 57002892
        [count] => 1
    )

[1] => Array
    (
        [user_id] => 515576073
        [count] => 1
    )

[2] => Array
    (
        [user_id] => 560299932
        [count] => 1
    )

[3] => Array
    (
        [user_id] => 607960053
        [count] => 2
    )
)

这可能吗？

Answer 1

在下面的代码中输入你的示例$ input_array：

$user_id_hash = array();
foreach( $input_array as $occur )
{
    if( !array_key_exists( $occur['user_id'], $user_id_hash ) )
    {
        $user_id_hash[$occur['user_id']] = 0;
    }
    $user_id_hash[$occur['user_id']]++;
}
$user_id_arr = array();
foreach( $user_id_hash as $user_id => $count )
{
    $user_id_arr[] = array( 'user_id' => $user_id, 'count' => $count );
}

如果您对关联数组没问题，可以删除第二个循环。

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1 个答案: