/system/library/config.php

<?php

final class Config {

	private $data = array();



  	public function get($key) {

    	return (isset($this->data[$key]) ? $this->data[$key] : null);

  	}	

	

	public function set($key, $value) {

    	$this->data[$key] = $value;

  	}



	public function has($key) {

    	return isset($this->data[$key]);

  	}



  	public function load($filename) {

		$file = DIR_CONFIG . $filename . '.php';

		

    	if (file_exists($file)) { 

	  		$cfg = array();

	  

	  		require($file);

	  

	  		$this->data = array_merge($this->data, $cfg);

		} else {

			trigger_error('Error: Could not load config ' . $filename . '!');

			exit();

		}

  	}

}

?>