do_action()

do_action() — Calls the callback functions that have been added to an action hook. This function invokes all functions attached to action hook $hook_name. It is possible to create new action hooks by simply calling this function, specifying the name of the new hook using the $hook_name parameter. You can pass extra arguments to the hooks, much like you can with apply_filters(). Example usage: // The action callback function. function example_callback( $arg1, $arg2 ) { // (maybe) do something with the args. } add_action( ‘example_action’, ‘example_callback’, 10, 2 ); /* Trigger the actions by calling the ‘example_callback()’ function that’s hooked onto example_action above. * – ‘example_action’ is the action hook.

Inputs: $hook_name (string): The name of the action to be executed.