# Introduction to Routing¶

Mathias Schreiber demonstrates the new way of handling URLs (Version 9.5, 28.09.2018).

## What is Routing?¶

When TYPO3 serves a request, it maps the incoming URL to a specific page or action. For example it maps an URL like https://example.org/news to the News page. This process of determining the page and/or action to execute for a specific URL is called “Routing”.

Additionally, routing will take care of beautifying URL parameters, for example converting https://example.org/profiles?user=magdalena to https://example.org/profiles/magdalena.

## Key Terminology¶

Route
The “speaking URL” as a whole (without the domain part); for example /news/detail/2019-software-update
Slug

Unique name for a resource to use when creating URLs; for example the slug of the news detail page could be /news/detail, and the slug of a news record could be 2019-software-update.

Within TYPO3, a slug is always a part of the URL “path” - it does not contain scheme, host, HTTP verb, etc. The URL “path” consists of one or more slugs which are concatenated into a single string.

A slug is usually added to a TCA-based database table, containing rules for evaluation and definition.

The default behaviour of a slug is as follows:

• A slug only contains characters which are allowed within URLs. Spaces, commas and other special characters are converted to a fallback character.
• A slug is always lower-cased.
• A slug is unicode-aware.
• Slugs must be separated by one or more character like “/”, “-”, “_” and “&”. Regular characters like letters should not be used as separators for better readability.

Note

Until TYPO3 v9 routing for TYPO3 was done by using extensions such as realURL or coolURI. In contrast to concepts within RealURL of “URL segments”, a slug is a segment of a URL. Slugs should be separated by slashes, but this is not a strict requirement. Therefore a slug of a record may contain slashes. However the risk of conflicts is higher when using slashes within slugs. For example unrelated page hierarchies and records could have slugs forming the same URL path.

## Routing in TYPO3¶

Routing in TYPO3 is implemented based on the Symfony Routing components. It consists of two parts:

• Page Routing
• Route Enhancements and Aspects

Page Routing describes the process of resolving the concrete page (in earlier TYPO3 versions this were the id and L \$_GET parameters), whereas Route Enhancements and Aspects take care of all additionally configured parameters (such as beautifying plugin parameters, handling type etc.).

## Prerequisites¶

To ensure Routing in TYPO3 is fully functional the following prerequisites need to be met:

## Tips¶

### Using imports in yaml files¶

As routing configuration (and site configuration in general) can get pretty long fast, you should make use of imports in your yaml configuration which allows you to add routing configurations from different files and different extensions.

Example - Main config.yaml

imports:
- { resource: "EXT:myblog/Configuration/Routes/Default.yaml" }
- { resource: "EXT:mynews/Configuration/Routes/Default.yaml" }
- { resource: "EXT:template/Configuration/Routes/Default.yaml" }