Clean url in php using htaccess

This is called URL Rewrite. If your page links are dynamic, like extracting data from database which is mostly the case in e-commerce sites, then the best approach is to append the id at the end of URL. This way you can fetch the data from database. Like in your case, your new URL might look like:

http://www.example.com/Mobiles/4

When user will visit this link .htaccess file will internally rewrite this URL to:

http://www.example.com/Mobiles/index.php?id=4

In this way you can then retrieve id from your PHP like this:

$id = $_GET['id'];

or:

extract($_GET);

This extract function will create the variables automatically from the parameters name and you can access it directly with $id variable.

Here is the .htaccess code:

RewriteEngine On
RewriteRule ^Mobiles/(\d+)$ http://www.example.com/Mobiles/index.php?id=$1 

In case if you don't need URL like http://www.example.com/Mobiles/4, then use this:

RewriteEngine On
RewriteRule ^Mobiles$ http://www.example.com/Mobiles/index.php?id=4