The Dispatcher-

The Dispatcher handles URL redirections. For instance, instead of using multiple files in the root folder like product.php, order.php or category.php, PrestaShop only uses one file: index.php.

Starting with PrestaShop 1.5, front office URLs look like this:

• /index.php?id_category=3&controller=category

• /index.php?id_product=7&controller=product

• /index.php?id_cms=4&controller=cms

• etc.

Likewise, back office URLs look like this:

• /admin-dev/index.php?controller=AdminDashboard

• /admin-dev/index.php?controller=AdminProducts

• /admin-dev/index.php?controller=AdminCmsContent

• etc.

Additionally, the Dispatcher is built to support URL rewriting (or "Friendly URLs"). Therefore, PrestaShop URLs which look like this when URL-rewriting is off...

http://myprestashop.com/index.php?controller=category&id_category=3&id_lang=1
http://myprestashop.com/index.php?controller=product&id_product=1&id_lang=2

...will look like this when URL-rewriting is on:

http://myprestashop.com/en/3-music-ipods
http://myprestashop.com/fr/1-ipod-nano.html

There are several advantages to this system:

• It is easier to add a controller.

• You can use custom routes to change your friendly URLs (which is really better for SEO!)

• There is only one single entry point into the software, which improves PrestaShop's reliability, and facilitates future developments.

The Dispatcher makes use of three abstract classes: Controller, FrontController and AdminController (the last two inheriting from the first one).

New routes can be created by overriding the loadRoutes() method. The store's administrator can change a controller's URL using the "SEO & URLs" page in the back office's "Preferences" menu.