This site created for fast request information lookup, it containt 80% of information that can be real useful from request. No lost of text, not lots of ads, just find in our functionality useful for you information. Page functionality:

• IP address lopkup
• IP detection through proxy
• all proxy headers array
• my proxy headers
• All request headers
• User Agent detection
• Connected from hostname
• Proxy hostname
• fetch SERVER variables
• print_r($_SERVER)

$_SERVER is an array containing information such as headers, paths, and script locations. The entries in this array are created by the web server. There are large number of these variables are accounted for in the CGI 1.1 specification, so you should be able to expect those. You can be sure that no other variables from your request are accessible on any other site.