Using WordPress ‘request_filesystem_credentials()’ PHP function
Displays a form to the user to request for their FTP/SSH details in order to connect to the filesystem.
HTTPS
Using WordPress ‘remove_theme_support()’ PHP function
Allows a theme to de-register its support of a certain feature
Using WordPress ‘remove_option_whitelist()’ PHP function
Removes a list of options from the allowed options list.
Using WordPress ‘require_wp_db()’ PHP function
Load the database class file and instantiate the §wpdb global.
Using WordPress ‘remove_custom_background()’ PHP function
The article "Using WordPress `remove_custom_background()` PHP Function" explains how to remove custom background support from a WordPress theme using the `remove_custom_background()` PHP function
Using WordPress ‘remove_all_filters()’ PHP function
Removes all of the callback functions from a filter hook.
Using WordPress ‘remove_all_actions()’ PHP function
Removes all of the callback functions from an action hook.
Using WordPress ‘remove_allowed_options()’ PHP function
Removes a list of options from the allowed options list.
Using WordPress ‘register_theme_feature()’ PHP function
Registers a theme feature for use in add_theme_support() .