Using WordPress ‘get_allowed_mime_types()’ PHP function
Retrieves the list of allowed mime types and file extensions.
PHP
Using WordPress ‘get_alloptions()’ PHP function
Retrieve all autoload options, or all options if no autoloaded ones exist.
Using WordPress ‘get_adjacent_post_rel_link()’ PHP function
The `get_adjacent_post_rel_link()` function in WordPress retrieves the adjacent post relational link, which can be either the next or previous post link
Using WordPress ‘get_404_template()’ PHP function
Retrieves path of 404 template in current or parent template.