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# getenv

(PHP 4, PHP 5)

getenv — Gets the value of an environment variable

### Opis

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.

### Parametry

`varname`

  The variable name.

### Zwracane wartości

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

### Przykłady

Przykład #1 getenv() Example

`<?php
// Example use of getenv()
$ip = getenv('REMOTE_ADDR');
// Or simply use a Superglobal ($_SERVER or $_ENV)
$ip = $_SERVER['REMOTE_ADDR'];
?>`

### Zobacz też:

- putenv() - Sets the value of an environment variable
- apache_getenv() - Get an Apache subprocess_env variable
- Superglobals

get_required_files
getlastmod
PHP Options/Info Funkcje
PHP Manual