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'];
?>

See Also

     

 

 
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