Purpose of routes.php in codeigniter

Question

I just want to know the purpose of this on routes.php

$route['default_controller'] = "welcome";  
$route['scaffolding_trigger'] = ""; 

Answer 1

Let me first take your through routing and then tell you about the meaning of those lines in routes.php .

You should start with URI Routing . In short, what you do with routes is that you map a certain URI with a controller/method/parameter statement.

Examples

See the following examples taken from the user guide:

So, something like example.com/journals can be routed to the blogs controller.

$route['journals'] = "blogs";

Another good example is when you are building a product catalogue and you need example.com/product/some_id to be routed to a controller catalog :

$route['product/(:num)'] = "catalog/product_lookup_by_id/$1";

In the example above, catalog will be the controller, product_lookup_by_id will be the method and $1 is the parameter which is picked up from the URI.

Answer to your question

You have asked:

I just want to know the purpose of this on routes.php

 $route['default_controller'] = "welcome"; $route['scaffolding_trigger'] = ""; 

The default_controller is quite obvious. This means welcome/index will be loading whenever `example.com/index is being requested.

scaffolding_trigger was deprecated in 1.7 but you can read about it . Scaffolding was a method which you could use to seed data in your database.

Answer 2

$route['default_controller'] = "welcome";  

This is the default controller which codeigniter would start with when you didnt specify a controller to the URL.

url:

ip/monitor/index.php

This will trigger the default controller aka welcome.php

url:

ip/monitor/index.php/controller

This will, however, trigger your given controller and not the default one

This is mostly used to asign a index page as the start page.

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I'm not sure about $route['scaffolding_trigger'] = ""; as i never used it. But according to the comments it has been removed in version 2.0

Answer 3

Routing rules are defined in your application/config/routes.php file. In it you'll see an array called $route that permits you to specify your own routing criteria. Routes can either be specified using wildcards or Regular Expressions.

For more detail please see this link :

http://ellislab.com/codeigniter%20/user-guide/general/routing.html