VariablesInterface.php
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<?php
namespace Dotenv\Environment;
use ArrayAccess;
/**
* This environment variables interface.
*/
interface VariablesInterface extends ArrayAccess
{
/**
* Determine if the environment is immutable.
*
* @return bool
*/
public function isImmutable();
/**
* Tells whether environment variable has been defined.
*
* @param string $name
*
* @return bool
*/
public function has($name);
/**
* Get an environment variable.
*
* @param string $name
*
* @throws \InvalidArgumentException
*
* @return string|null
*/
public function get($name);
/**
* Set an environment variable.
*
* @param string $name
* @param string|null $value
*
* @throws \InvalidArgumentException
*
* @return void
*/
public function set($name, $value = null);
/**
* Clear an environment variable.
*
* @param string $name
*
* @throws \InvalidArgumentException
*
* @return void
*/
public function clear($name);
}