Add Security to your PHP projects using .htaccess file

Making .htaccess file Very simple open any editor like notepad just file save as into .htaccess with in double quotations(".htacess"). You have to upload this file in to hosting root folder, my experience .htaccess file supports only Unix based servers.  Download Sample .htaccess File Hide .php extension with URL Rewriting  For example if we want to project like Twitter API URLs (Note: Twitter API Developed in Ruby on Rails) Add this following code in your .htaccess file RewriteEngine on RewriteRule ^(.*)\$ $1.php We can Rewrite index.php into index.html,index.asp,index.sri also Below code for index.php to index.html RewriteEngine on RewriteRule ^(.*)\.html$ $1.php If you want .asp extension just replace html to asp Redirecting www URL to non www URL If you type www.twitter.com in browser it will be redirected to twitter.com. Add this Following Code: RewriteEngine On RewriteCond %{HTTP_HOST} ^www.srinivas.com RewriteRule (.*) http://srinivas.com/$1 [R=301,L] Rewriting 'site.com/profile.php?username=foxscan' to 'site.com/foxscan' My twitter profile http://twitter.com/foxscan its original link passing GET values (http://twitter.com/profile.php?username=foxscan) but this URL is ugly in browser address bar, For user friendly we can change like this.