What is WordPress Hook: update_{$meta_type}_metadata_cache
The update_{$meta_type}_metadata_cache hook in WordPress is used to update the metadata cache for a specific type of meta. This hook allows developers to modify or perform additional actions when the metadata cache is updated.
Understanding the Hook: update_{$meta_type}_metadata_cache
The update_{$meta_type}_metadata_cache hook is located within the update_meta_cache function in the wp-includes/meta.php file. This function is responsible for updating the metadata cache for a specific type of meta, such as post meta or term meta.
Hook Parameters (if applicable): update_{$meta_type}_metadata_cache
The update_{$meta_type}_metadata_cache hook does not accept any specific parameters. It is triggered when the metadata cache for a specific type of meta is updated, allowing developers to perform additional actions or modifications.
Hook Doesn’t Work: update_{$meta_type}_metadata_cache
If the update_{$meta_type}_metadata_cache hook doesn’t work as expected, it could be due to incorrect usage or conflicts with other hooks or functions. To troubleshoot, developers should check for any errors in their code, ensure that the hook is being called at the appropriate time, and deactivate any other plugins or themes that may be interfering with the hook.
Best Practices & Usage Notes (if applicable): update_{$meta_type}_metadata_cache
When using the update_{$meta_type}_metadata_cache hook, developers should be mindful of the potential performance implications, especially when dealing with a large amount of metadata. It’s important to use this hook judiciously and consider any potential impact on site performance.
Usage Example: update_{$meta_type}_metadata_cache
“`php
function custom_update_metadata_cache( $meta_ids, $object_type ) {
// Perform custom actions when the metadata cache is updated
}
add_action( ‘update_post_metadata_cache’, ‘custom_update_metadata_cache’, 10, 2 );
“`
In this example, the custom_update_metadata_cache function is hooked to the update_post_metadata_cache hook, allowing developers to perform custom actions when the post metadata cache is updated.