Action Handler

Add a handler to execute in response to actions:

1. Create a plugin
2. In the main PHP code, execute add_action calls:
   •     add_action(‘wp_head’,my_function());
     • The first parameter is the action that the code will respond to
     • The second should be your function.
3. Possible actions:
   1. https://codex.wordpress.org/Plugin_API/Action_Reference