getenv
Gets the value of an environment variable
Description
string getenv
( string $varname
)
You can see a list of all the environmental variables by using
phpinfo. Many of these variables are listed within
» RFC 3875, specifically
section 4.1, "Request Meta-Variables".
Parameters
-
varname
-
The variable name.
Return Values
Returns the value of the environment variable
varname, or FALSE if the environment
variable varname does not exist.
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'];
?>