WordPress Hooks

action-hook-anatomy.php

<?php

/**
* An action hook recives four params.
* 
* @param string $hook_name - The name of the hook
* @param callable $callback - The callback where we are going to add our logic.
* @param int $priority - The priority of the hook. Used to specify the order in which the functions associated with a particular action are executed.
* @param int $params - The number of arguments the function accepts
*/
add_action( 'action_hook_name', 'callback_name', 10, 1 );