How to use delete_meta_type_metadata_by_mid filter in WordPress

As a fellow WordPress enthusiast, you’d know that hooks are the backbone of customizing WordPress. One such hook is the delete_meta_type_metadata_by_mid filter. This dynamic hook lets you interact with metadata operations, and it’s a real game-changer if you’re dealing with meta values for various objects like posts, comments, terms, or users.

To get started with using the delete_meta_type_metadata_by_mid filter, you’ll need to register it using add_filter. You can either add this to your theme’s functions.php file or create a custom WordPress Plugin, which is usually a safer way to ensure your customizations are update-proof.

Example 1: Modifying Metadata Deletion

In this example, we define a function called weplugins_modify_delete_meta_type_metadata_by_mid_defaults to modify the metadata deletion process. It’s then registered with the hook.

    function weplugins_modify_delete_meta_type_metadata_by_mid_defaults($delete, $meta_id) { 
        // Update the $delete variable according to your website requirements and return this variable.
        return $delete; 
    }
    // add the filter
    add_filter("delete_meta_type_metadata_by_mid", "weplugins_modify_delete_meta_type_metadata_by_mid_defaults", 10, 2);
    

Example 2: Removing a Hook Callback

If you need to remove this hook callback, you can use remove_filter as shown below. Just ensure you provide the same callback function name, priority, and number of arguments as when adding the filter.

    remove_filter("delete_meta_type_metadata_by_mid", "weplugins_modify_delete_meta_type_metadata_by_mid_defaults", 10, 2);
    

Example 3: Applying the Filter

Here’s how you can apply the delete_meta_type_metadata_by_mid filter. This could be part of a larger function or process where you are determining whether to allow metadata deletion.

    apply_filters("delete_{$meta_type}_metadata_by_mid", null|bool $delete, int $meta_id);
    

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If you find yourself needing more customized solutions or run into issues using this hook, don’t hesitate to contact us. We’re here to help with all your WordPress customization needs!