(PHP 4, PHP 5, PHP 7)
getenv — Gets the value of an environment variable
$varname
)Gets the value of an environment variable.
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".
varnameThe variable name.
Returns the value of the environment variable
varname, or FALSE if the environment
variable varname does not exist.
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'];
?>