@since: 4.7.0

Checks if a specific action has been registered for this hook.

Rewinds the Iterator to the first element.

Checks if any callbacks have been registered for this hook.

Removes all callbacks from the current filter.

Calls the callback functions that have been added to a filter hook.

Calls the callback functions that have been added to an action hook.

Processes the functions hooked into the ‘all’ hook.

Return the current priority level of the currently running iteration of the hook.

Normalizes filters set up before WordPress has initialized to WP_Hook objects.

Determines whether an offset value exists.

Retrieves a value at a specified offset.

Sets a value at a specified offset.

Unsets a specified offset.

Returns the current element.