Mini-Laravel-Like config setup

Config.class.php

<?php
/*
 This is a simple, Laravel-like config sysytem, add files to a config/ folder in the following setup:

config.php:
<?php
return array(
	'site_name' => 'My Website',
	'site_strapline' => 'This is my first website'
);
?>

---------
*/

class Config{
	private $settings;
	private $environment;
	private $configPath;
	
	public function __construct( $configPath = './config', $environment = '' ){
		$this->configPath = $configPath;
		$this->environment = $environment;
	}
	public function get($key){
		$key = explode('.',$key);
		$file = $key[0];
		$key = $key[1];
		$items = $this->load($file);
		if( isset($items[ $key ]) ){
			return $items[ $key ] ;
		}
	}
	private function load($file){
		$items = array();
		$filename = array();
		$filename[] = $this->configPath;
		if( $this->environment != '' ){
			$filename[] = $this->environment;
		}
		$filename[] = $file.'.php';
		$filename = implode('/',$filename);
		if( file_exists( $filename ) ){
			$items = $this->mergeEnvironment($items, $filename);
		}else{
			$filename = array();
			$filename[] = $this->configPath;
			$filename[] = $file.'.php';
			$filename = implode('/',$filename);
			if( file_exists( $filename ) ){
				$items = $this->mergeEnvironment($items, $filename);
			}
		}
		return $items;
	}
	protected function mergeEnvironment(array $items, $file){
		return array_replace_recursive($items, $this->getRequire($file));
	}
	private function getRequire($file){
		return require $file;		
	}
}
/* 
	Then you can call your config setup as follows:
*/
	$configPath = './config';
	$config = new Config( $configPath );
	echo $config->get('config.site_name');
/*
	which will return the "config/config.php" file and check the returned array for the "site_name" key.

---------

	If you want to use environments such as testing and production, then you can specify the environment 
	when you call your class and store the config files in a folder for each environment in the config/ folder.
	For example create a testing/ folder and create config.php

*/
	$configPath = './config';
	$config = new Config( $configPath ,'testing');
	echo $config->get('config.site_name');
/*
	will see if "config/testing/config.php" exists and if it does, will load that, otherwise, it will check 
	for "config/config.php" and include that file instead.
*/