An online WHOIS domain name query tool built with PHP script. It has the following advantages: First, no database is used. Because as a personal webmaster, database tools will increase the space. Generally, the database of webmasters is relatively small, and simple tools do not need to be so complicated. Second, installation is easy. Just a simple WHOIS.PHP file, which can be opened and used directly in a space that can run PHP scripts. Third, it is compatible with most domain name queries. We can query 47 domain name suffixes such as .COM/NET/ORG online. If you need other suffixes, you can add them yourself in the source code.