The 'postmeta_form_keys' PHP filter in WordPress allows developers to add custom fields to the post editor screen.

The 'postmeta_form_limit' PHP filter in WordPress allows developers to limit the number of custom fields displayed in the post editor. This can improve the user experience and prevent clutter in…

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_groupby' PHP filter in WordPress allows developers to modify the GROUP BY clause used in SQL queries for posts. This can be useful for customizing how posts are grouped…

The 'posts_groupby_request' PHP filter in WordPress allows developers to modify the GROUP BY clause of a SQL query. This can be useful for customizing the way posts are grouped and…

The 'posts_join_paged' PHP filter in WordPress allows developers to modify the SQL query used to retrieve paged posts. This can be useful for customizing the search functionality or adding additional…

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_pre_query' PHP filter in WordPress allows developers to modify the SQL query used to retrieve posts before it is executed. This can be useful for customizing the query to…

The 'pre_comment_author_email' PHP filter in WordPress allows developers to modify the email address of a comment author before it is saved to the database. This can be useful for spam…