Php Server Variable

$_SERVER Variable is an array containing information such as headers, paths, and script locations. That Information are created by the web server.
It is not sured that every website server will provide similar information.

If PHP is running as a command-line processor this variable contains the script name since ... Note: Your web server must be configured to create this variable.


Syntax=>$_SERVER['predefine_variable']
ex. echo  $_SERVER['HTTP_HOST'];
Output-localhost/websitename

Following predefine  server Variable using php
Ex. This example output of $_SERVER taken from localhost
<?php
echo $_SERVER['HTTP_HOST'];
echo "<pre>";
print_r($_SERVER);
echo "</pre>";
?>

1.  [HTTP_HOST] => localhost/websitename
2. [HTTP_CONNECTION] => keep-alive
3. [HTTP_ACCEPT] => text/html,application/xhtml+xml,application/xml;q=0.9,image/webp,*/*;q=0.8
4. [HTTP_USER_AGENT] => Mozilla/5.0 (Windows NT 6.1) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/30.0.1599.69 Safari/537.36
5. [HTTP_REFERER] => http://localhost/test/
6. [HTTP_ACCEPT_ENCODING] => gzip,deflate,sdch
7. [HTTP_ACCEPT_LANGUAGE] => en-US,en;q=0.8
8. [HTTP_COOKIE] => __atuvc=59%7C40%2C156%7C41%2C1%7C42
9. [PATH] => C:\Program Files\Intel\iCLS Client\;C:\Windows\system32;C:\Windows;C:\Windows\System32\Wbem;C:\Windows\System32\WindowsPowerShell\v1.0\;C:\Program Files\Intel\OpenCL SDK\2.0\bin\x86;C:\Program Files\Intel\Intel(R) Management Engine Components\DAL;C:\Program Files\Intel\Intel(R) Management Engine Components\IPT;
10. [SystemRoot] => C:\Windows
11. [COMSPEC] => C:\Windows\system32\cmd.exe
12. [PATHEXT] => .COM;.EXE;.BAT;.CMD;.VBS;.VBE;.JS;.JSE;.WSF;.WSH;.MSC
13. [WINDIR] => C:\Windows
14. [SERVER_SIGNATURE] =>
15. [SERVER_SOFTWARE] => Apache/2.2.4 (Win32) PHP/5.2.1
16. [SERVER_NAME] => localhost
17. [SERVER_ADDR] => 127.0.0.1
18. [SERVER_PORT] => 80
19. [REMOTE_ADDR] => 127.0.0.1
20. [DOCUMENT_ROOT] => C:/wamp/www
21. [SERVER_ADMIN] => webmaster@localhost
22. [SCRIPT_FILENAME] => C:/wamp/www/test/server.php
23. [REMOTE_PORT] => 58329
24. [GATEWAY_INTERFACE] => CGI/1.1
25. [SERVER_PROTOCOL] => HTTP/1.1
26. [REQUEST_METHOD] => GET
27. [QUERY_STRING] =>
28. [REQUEST_URI] => /test/server.php
29. [SCRIPT_NAME] => /test/server.php
30. [PHP_SELF] => /test/server.php
31. [REQUEST_TIME] => 1382009753
32. [argv] => Array ( )
33. [argc] => 0