Question

I am building a complex AJAX based solution as a module into a Drupal 7 site. I decided not to write a standalone PHP script to respond to my jQUERY ajax call but implement the code within my drupal module.

My problem is establishing the connection between jQUERY and DRUPAL i:e the function which responds to my CLICK EVENT.

I was using the following code:

function staff_filter_menu(){
    $items = array();
    $items['staff/filtering/results/%'] = array(
        'page callback' => 'staff_filter_function',
        'access callback' => TRUE,
        'type' => MENU_CALLBACK,
        'delivery callback' => 'staff_filter_deliver',
    );
    $items['staff/filtering/saveclipboard'] = array(
        'page callback' => 'staff_filter_savetoDB',
        'access callback' => TRUE,
        'type' => MENU_CALLBACK,
        'delivery callback' => 'staff_filter_deliver',
    );
    drupal_flush_all_caches();
    return $items;
}

But, it stopped working when I stopped, uninstalled and restarted the module. It seems to not be a reliable strategy.

Answer 1

drupal_flush_all_caches() does this:

Empties cache tables, rebuilds the menu cache and theme registries, and invokes a hook so that other modules’ cache data can be cleared as well.

When the menu is rebuilt, hook_menu() is called…basically you’re causing an infinite loop by putting drupal_flush_all_caches() where you currently have it.