CodeIgniter URI Routing helps in mapping class/method relationship again in the given context. Custom flow can be incorporated rather using default class/method relationship. Below are URI routing pattern syntaxes of CodeIgniter: [php] {domain-name}/{class_name}/{function_name}/{parameters} or {domain-name}/{first-segment}/{second-segment}/{third-segment} [/php] In the above syntax, first segment => class name second segment => method or function name third segment => parameters User can set their own rules in CodeIgniter URI Routing context.

CodeIgniter routing rules are defined in the file route.php present under the path directory application/config. An array known as $route gives the permission to define user own rules in URI routing. CodeIgniter setting up of own rules can be done in two ways:

There are two types of wildcards. They are: Note: Wildcards are aliases to the Regular Expressions. With :any being translated to [^/]+ and :num to [0-9]+, respectively. :num : It matches the segment that has only numbers. For example, [php]$route['(records/:num)'] = 'student/details/$1';[/php] In the above example code, it can be observed that "records" is first segment of the URL, and second segment :num will remap to the class "student" and the "details" method passing in the match as a variable to the function. If invoked https://www.school.com/records/1 or https://www.school.com/records/2 it will redirect to https://www.school.com/student/details/$1. :any : It matches the segment that has only characters. For example, [php]$route['(records/:any)'] = 'student/details';[/php] In the above example code, it can be observed that "records" is first segment of the URL, and second segment :any will remap to the class "student" and the "details" method passing in the match as a variable to the function. https://www.school.com/records/john or https://www.school.com/records/mike is invoked it will redirect to https://www.school.com/student/details. Note : Here records is the controller and details is controller function. Note : Do not use leading/trailing slashes.

Routes can also be redirected with CodeIgniter Regular Expression. [php]$route['records/([a-zA-Z0-9]+)'] = 'student/details';[/php] Using the above code URL can be invoked with own regular expressions in which special characters are not permitted to use. A segment with forward slash (‘/’) can also be matched which normally indicates the delimiter among many segments.

• CodeIgniter URI Routing helps in mapping class/method relationship again in the given context.
• CodeIgniter URI Routing - $route gives the permission to define user own rules in URI routing.
• CodeIgniter URI Routing - Wildcards and Regular Expression are the ways to set rules For CodeIgniter URI Routing.