​Learn how to use the `after_mu_upgrade` WordPress filter to execute custom functions after a Multisite database upgrade in this informative article.

Using the `get_the_excerpt` WordPress PHP filter allows you to modify the post excerpt after it is retrieved from the database and before it is returned from the `get_the_excerpt()` function. Learn…

The 'posts_fields' PHP filter in WordPress allows developers to customize the SELECT statement used to retrieve post data from the database. This can be useful for optimizing queries and improving…

The 'posts_fields_request' PHP filter in WordPress allows developers to modify the SQL query used to retrieve post data. This can be useful for customizing the data returned by the query…

The 'posts_join_request' PHP filter in WordPress allows developers to modify the SQL query used to retrieve posts. This can be useful for adding custom filters or sorting options to a…

The 'posts_request' PHP filter in WordPress allows developers to modify the SQL query used to retrieve posts from the database. This can be useful for customizing the query to fit…

​[How to Use WordPress `posts_request_ids` PHP Filter](https://www

The 'pre_cache_alloptions' PHP filter in WordPress allows developers to modify the options that are cached in memory, resulting in improved performance and reduced database queries.

The 'pre_comment_approved' filter in WordPress allows developers to modify the approval status of comments before they are saved to the database. This can be useful for implementing custom moderation rules…