URL shortener 1 How to install? This program is easy to install and has no database. You can use it by directly uploading the source code. 2 System requirements? Installation environment requirements: APACHE + PHP 5.2+ supports REWRITE 3 Realistic functions: It has the function of short URL. It is very convenient to use. It is suitable for users who need to shorten domain names. This program is free. If there are any bugs, please correct them.