​The `get_sample_permalink` WordPress PHP filter modifies the sample permalink of a post by allowing users to add their own custom function to replace or manipulate the default permalink structure

The 'getarchives_where' PHP filter in WordPress allows for customized queries of archive data.

The 'get_the_post_type_description' PHP filter in WordPress allows developers to retrieve and modify the description of a post type.

The 'map_meta_cap' PHP filter in WordPress allows developers to customize user capabilities for specific actions, providing greater control over user permissions.

The 'has_post_thumbnail' PHP filter in WordPress is a powerful tool for displaying featured images on your website.

​The `get_the_terms` function in WordPress allows you to retrieve the terms of a specific taxonomy associated with a post

The 'hidden_meta_boxes' PHP filter in WordPress allows developers to customize the visibility of meta boxes on the post editing screen.

The 'iis7_supports_permalinks' PHP filter in WordPress can be a useful tool for ensuring proper permalink functionality on IIS servers.

The 'is_post_type_viewable' PHP filter in WordPress allows developers to control the visibility of custom post types on the front-end of a website.