getenv
(PHP 3, 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'];
?>
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