Function: Calls the ‘all’ hook, which will process the functions hooked into it.

Function: Builds Unique ID for storage and retrieval.

Function: Register a plugin’s real path.

Function: Get the filesystem directory path (with trailing slash) for the plugin __FILE__ passed in.

Function: Get the URL directory path (with trailing slash) for the plugin __FILE__ passed in.

Function: Set the activation hook for a plugin.

Function: Sets the deactivation hook for a plugin.

Function: Sets the uninstallation hook for a plugin.

Function: Calls the callback functions that have been added to an action hook, specifying arguments in an array.