By default, the script the service's domain, adds a "/" and then a starts counting the shortened links.
Installation instructions are provided inside the project's README file.
Here are some key features of "PHP URL Shortener":
· Can shorten over 42 billion unique URLs in 6 or less characters (it can do more than 12,000,000 in only 4!)
· Super duper fast—uses very little server resources
· Includes an API so you can create your own short URLs on the fly
· Option to turn click-through tracking on and off
· Option to limit usage to 1 IP address for personal use and to prevent spamming from others
· Only uses alphanumeric characters so all browsers can interpret the URL
· Secure—several data filters in place to prevent SQL injection hacks
· Option to check if the URL is real (doesn’t respond with a 404) before shortening
· Uses 301 redirects for SEO and analytics data
· Option to store a local cache to prevent database queries on every redirect
· Option to change the characters allowed in a shortened URL