The 'default_feed' PHP filter in WordPress allows developers to customize the default feed URL and content.

The 'default_hidden_columns' PHP filter in WordPress allows developers to customize the columns that are hidden by default in the admin panel. This can improve the user experience and streamline workflows.

The 'default_hidden_meta_boxes' PHP filter in WordPress allows developers to easily hide specific meta boxes in the admin panel.

​The `default_{$meta_type}_metadata` WordPress filter modifies the default metadata value for a specified meta key and object based on its type, allowing developers to easily set default values for their custom…

The WordPress 'default_option_{$option}' PHP filter allows developers to modify the default value of an option before it is retrieved from the database. This can be useful for customizing default settings…

​The `default_page_template_title` filter in WordPress allows developers to easily modify the title of the default page template by adding their own function and specifying the desired parameters

The WordPress 'default_site_option_{$option}' PHP filter allows developers to modify default site options programmatically.

The 'default_template_types' PHP filter in WordPress allows developers to add custom template types to their themes.

​The `default_title` WordPress filter allows you to modify the default post title used in the "Write Post" form by adding a function that returns a modified version of the original…