Using WordPress ‘comments_template()’ PHP function
The `comments_template()` function in WordPress allows you to customize the layout of your website's comments section using a PHP file
Database
Using WordPress ‘dbDelta()’ PHP function
The `dbDelta()` function in WordPress allows modification of the database through the execution of SQL queries
Using WordPress ‘get_default_post_to_edit()’ PHP function
Returns default post information to use when populating the “Write Post” form.
Using WordPress ‘get_meta_sql()’ PHP function
Given a meta query, generates SQL clauses to be appended to a main query.