Using WordPress ‘do_action()’ PHP function
Calls the callback functions that have been added to an action hook.
HTTPS
Using WordPress ‘download_url()’ PHP function
Downloads a URL to a local temporary file using the WordPress HTTP API.
Using WordPress ‘doing_filter()’ PHP function
Returns whether or not a filter hook is currently being processed.
Using WordPress ‘discover_pingback_server_uri()’ PHP function
Finds a pingback server URI based on the given URL.
Using WordPress ‘did_filter()’ PHP function
Retrieves the number of times a filter has been applied during the current request.
Using WordPress ‘did_action()’ PHP function
Retrieves the number of times an action has been fired during the current request.
Using WordPress ‘deslash()’ PHP function
Learn about the WordPress `deslash()` function, which removes unnecessary backslashes from strings, in this informative article
Using WordPress ‘delete_post_thumbnail()’ PHP function
Removes the thumbnail (featured image) from the given post.
Using WordPress ‘delete_post_meta_by_key()’ PHP function
Deletes everything from post meta matching the given meta key.