Hello Readers,
Today we will discuss about "Php server variables".

$_SERVER is one of the tremendous world-wide specifics within PHP. It includes information regarding headers, server, web host in addition to and many others. Its content has enormous directory information along with proper world-wide indices.

There are few type of variable which we listed below :-

1. Server information
2. Header information
3. Details on PHP page request
4. File name or path information
5. Remote user information

Server information :-

• GATEWAY_INTERFACE: Holds the name of common gateway version under which server is running.

<?php $_SERVER['GATEWAY_INTERFACE']; ?> 

• SERVER_NAME: Holds the server name.

<?php $_SERVER['SERVER_NAME']; ?>

• SERVER_ADDR: Holds server IP address.

<?php $_SERVER['SERVER_ADDR']; ?>

• SERVER_PORT: Hold the port number of the server.

<?php $_SERVER['SERVER_PORT']; ?>

• SERVER_PROTOCOL: Holds the name of the protocol.

<?php $_SERVER['SERVER_PROTOCOL']; ?> 

Server Header information :-

• HTTP_HOST: IT holds the http host information.

<?php $_SERVER['HTTP_HOST']; ?>

• HTTP_CONNECTION: It holds the http connection information.

<?php $_SERVER['HTTP_CONNECTION']; ?> 

• HTTP_ACCEPT_CHARSET: Charaterset information.

<?php $_SERVER['HTTP_ACCEPT_CHARSET']; ?>

• HTTP_ACCEPT_ENCODING: Encoding nformation.

<?php $_SERVER['HTTP_ACCEPT_ENCODING']; ?>

• HTTP_ACCEPT_LANGUAGE: Language information.

<?php $_SERVER['HTTP_ACCEPT_LANGUAGE']; ?>

Details on PHP page request :-

• REQUEST_METHOD:

$_SERVER['REQUEST_METHOD'];

• REQUEST_TIME:

$_SERVER['REQUEST_TIME'];

4. File name or path information

• PHP_SELF: Hold the current url of the page.

<?php $_SERVER['PHP_SELF']; ?>

• DOCUMENT_HOLD: Hold name of the root directory as specified in PHP configuration file php.ini.

<?php $_SERVER['DOCUMENT_HOLD']; ?>

• QUERY_STRING: Hold the parameter of the url i.e, localhost/demo/home.php?user_id="1"

<?php $_SERVER['QUERY_STRING']; ?>    

• REQUEST_URL: full path of the page running currently.

<?php $_SERVER['QUERY_STRING']; ?>

• SCRIPT_FILENAME: full path of the page running currently.

<?php $_SERVER['SCRIPT_FILENAME'];?>

• PATH_INFO:It consists information if anything given at the client side.

<?php $_SERVER['PATH_INFO']; ?>

Remote user information

• REMOTE_HOST:

<?php $_SERVER['REMOTE_HOST']; ?>

• REMOTE_ADDR:

<?php $_SERVER['REMOTE_ADDR']; ?

• REMOTE_PORT:

<?php $_SERVER['REMOTE_ADDR']; ?>