PHP $_SERVER

PHP $_SERVER

$_SERVER is a PHP super global variable which holds information about headers, paths, and script locations.
The example below shows how to use some of the elements in $_SERVER:

Example

<?php
echo $_SERVER['PHP_SELF'];
echo "<br>";
echo $_SERVER['SERVER_NAME'];
echo "<br>";
echo $_SERVER['HTTP_HOST'];
echo "<br>";
echo $_SERVER['HTTP_REFERER'];
echo "<br>";
echo $_SERVER['HTTP_USER_AGENT'];
echo "<br>";
echo $_SERVER['SCRIPT_NAME'];
?>

   
   
Element/Code
   
   
Description
  
   
   
$_SERVER['PHP_SELF']
   
   
Returns the filename of the currently executing script
  
   
   
$_SERVER['GATEWAY_INTERFACE']
   
   
Returns the version of the Common Gateway Interface (CGI)   the server is using
  
   
   
$_SERVER['SERVER_ADDR']
   
   
Returns the IP address of the host server
  
   
   
$_SERVER['SERVER_NAME']
   
   
Returns the name of the host server (such as www.w3schools.com)
  
   
   
$_SERVER['SERVER_SOFTWARE']
   
   
Returns the server identification string (such as   Apache/2.2.24)
  
   
   
$_SERVER['SERVER_PROTOCOL']
   
   
Returns the name and revision of the information protocol   (such as HTTP/1.1)
  
   
   
$_SERVER['REQUEST_METHOD']
   
   
Returns the request method used to access the page (such   as POST)
  
   
   
$_SERVER['REQUEST_TIME']
   
   
Returns the timestamp of the start of the request (such as   1377687496)
  
   
   
$_SERVER['QUERY_STRING']
   
   
Returns the query string if the page is accessed via a   query string
  
   
   
$_SERVER['HTTP_ACCEPT']
   
   
Returns the Accept header from the current request 
  
   
   
$_SERVER['HTTP_ACCEPT_CHARSET']
   
   
Returns the Accept_Charset header from the current request   (such as utf-8,ISO-8859-1)
  
   
   
$_SERVER['HTTP_HOST']
   
   
Returns the Host header from the current request 
  
   
   
$_SERVER['HTTP_REFERER']
   
   
Returns the complete URL of the current page (not reliable   because not all user-agents support it)
  
   
   
$_SERVER['HTTPS']
   
   
Is the script queried through a secure HTTP protocol
  
   
   
$_SERVER['REMOTE_ADDR']
   
   
Returns the IP address from where the user is viewing the   current page
  
   
   
$_SERVER['REMOTE_HOST']
   
   
Returns the Host name from where the user is viewing the   current page
  
   
   
$_SERVER['REMOTE_PORT']
   
   
Returns the port being used on the user's machine to   communicate with the web server
  
   
   
$_SERVER['SCRIPT_FILENAME']
   
   
Returns the absolute pathname of the currently executing   script
  
   
   
$_SERVER['SERVER_ADMIN']
   
   
Returns the value given to the SERVER_ADMIN directive in   the web server configuration file (if your script runs on a virtual host, it   will be the value defined for that virtual host) (such as   someone@w3schools.com)
  
   
   
$_SERVER['SERVER_PORT']
   
   
Returns the port on the server machine being used by the   web server for communication (such as 80)
  
   
   
$_SERVER['SERVER_SIGNATURE']
   
   
Returns the server version and virtual host name which are   added to server-generated pages
  
   
   
$_SERVER['PATH_TRANSLATED']
   
   
Returns the file system based path to the current script
  
   
   
$_SERVER['SCRIPT_NAME']
   
   
Returns the path of the current script
  
   
   
$_SERVER['SCRIPT_URI']
   
   
Returns the URI of the current page