Overview
KB
Technical FAQ
PHP Manual
CSS2 Manual
HTML Manual
JS Guide
JS Reference
PhpDock Manual
Nu-Coder Manual
PhpExpress Manual
PHP Joomla
Development
Learn PHP
 
<get_required_filesgetlastmod>
Last updated: Tue, 19 Sep 2006

getenv

(PHP 3, PHP 4, PHP 5)

getenv -- Gets the value of an environment variable

Description

string getenv ( string varname )

Returns the value of the environment variable varname, or FALSE on an error.

<?php
// Example use of getenv()
$ip = getenv('REMOTE_ADDR');

// Or simply use a Superglobal ($_SERVER or $_ENV)
$ip = $_SERVER['REMOTE_ADDR'];
?>

You can see a list of all the environmental variables by using phpinfo(). You can find out what many of them mean by taking a look at the CGI specification, specifically the page on environmental variables.

See also putenv(), apache_getenv() and Superglobals.




<get_required_filesgetlastmod>
Last updated: Tue, 19 Sep 2006