Some Common $_SERVER Elements Variable

Some Common $_SERVER Elements Variable

$_SERVER['PHP_SELF']
The current script. Suitable for use in links and form element action arguments.
/phpbook/source/listing10.1.php

$_SERVER['HTTP_USER_AGENT']
The name and version of the client.
Mozilla/4.6 –(X11; I;Linux2.2. 6-15apmac ppc)

$_SERVER['REMOTE_ADDR']
The IP address of the client.
158.152.55.35

$_SERVER['REQUEST_METHOD']
Whether the request was GET or POST.
POST

$_SERVER['QUERY_STRING']
For GET requests, the encoded data sent appended to the URL.
name=matt&address=unknown

$_SERVER['REQUEST_URI']
The full address of the request, including query string.
/phpbook/source/listing10.1.php? name=matt

$_SERVER['HTTP_REFERER']
The address of the page from which the request was made.
http://p24.corrosive.co.uk/ref.html