Codeigniter URL Routing, Suffix & Enable Query String

Wildcards:

We can use two types of wildcards, namely:

1. :num –  Segment containing only numbers will be matched.
2. :any – Segment containing only characters will be matched.

$route['(blog/:num)'] = 'tutorial/java/$1';

$route['(blog/:any)'] = 'tutorial/java';

Regular Expression

$route['blog/([a-zA-Z0-9]+)'] = 'tutorial/java';

Reference : https://www.formget.com/routes-in-codeigniter