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	Last updated: Thu, 26 Jun 2008

getenv

(PHP 4, PHP 5)

getenv — Gets the value of an environment variable

Description

string getenv ( string $varname )

Gets the value of an environment variable.

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.

Parameters

varname: The variable name.

Return Values

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

Examples

Example #1 getenv() Example


<?php

// Example use of getenv()

$ip = getenv('REMOTE_ADDR');



// Or simply use a Superglobal ($_SERVER or $_ENV)

$ip = $_SERVER['REMOTE_ADDR'];

?>

getenv

Description

Parameters

Return Values

Examples

See Also