<html> <head> <title>Listing Some $_Server Elements</title> </head> <body> <?php $envs = array( "HTTP_REFERER", "HTTP_USER_AGENT", "REMOTE_ADDR","REMOTE_HOST", "QUERY_STRING", "PATH_INFO" ); foreach ( $envs as $env ) print "$env: $_SERVER[$env]<br>"; ?> </body> </html>