Function and usage of get_user_metavalues() in wordpress

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    2024-01-08T15:27:11+00:00

    The get_user_metavalues() function in WordPress is a specialized function designed to fetch metadata values associated with user profiles. This function is particularly useful when you need to obtain a collection of metadata for multiple users at once. Here's a detailed explanation of its usage:

    Function Signature:

    get_user_metavalues( array $ids ): array
    

    Purpose:

    • The primary purpose of get_user_metavalues() is to perform a database query that retrieves the metadata values ($metavalues) for a specified array of user IDs.
    • It is often used internally by other WordPress functions like _fill_user() and _fill_many_users() to populate user objects with the corresponding metadata.

    Parameters:

    • $ids (array, required): This parameter accepts an array of user ID numbers. These are the IDs of the users for whom you want to retrieve metadata.

    Return Value:

    • The function returns an array of arrays.
    • This array is indexed by the user_id, and each entry contains an array of $metavalues objects.
    • Each $metavalues object array contains the metadata associated with a specific user ID.

    Sample Usage:

    Suppose you want to fetch metadata for users with IDs 1, 2, and 3. Here's how you would use get_user_metavalues():

    $user_ids = array(1, 2, 3);
    $user_metavalues = get_user_metavalues($user_ids);
    
    foreach ($user_metavalues as $user_id => $metavalues) {
        echo "Metadata for User ID $user_id:\n";
        foreach ($metavalues as $meta_key => $meta_value) {
            echo "$meta_key => $meta_value\n";
        }
    }
    

    In this example:

    • We define an array $user_ids containing the user IDs 1, 2, and 3.
    • We call get_user_metavalues($user_ids) to fetch the metadata for these users.
    • The function returns an array of metadata, which we then iterate over using a foreach loop to display the metadata for each user.

    Note:

    • This function is more of a low-level utility function, mainly used for internal purposes within WordPress core functions.
    • It's not commonly used in theme or plugin development unless there is a specific need to manipulate or access user metadata directly and in bulk.

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