分享一个自各儿写的PHP CONFIG类

/** * config.php * * discription * * @filename config.php * @version  v1.0 * @update   2011-8-9 * @author   randy.hong * @contact	 [email&#160;protected] * @package  config */define('DS',			DIRECTORY_SEPARATOR);define('PATH_CONFIG',	'.'.DS.'configs');//config param key separatordefine('CONFIG_SEPARATOR',	'.');class CONFIG{	protected static $_configarray 	= array();	/**	 * 获取一个配置	 * @param string $key	 * @return mixed	 */	public static function get($key=''){		//inlegal param,return false		if(!$key){			return false;		}		//without separator in param, return the whole config file		if(strpos($key,CONFIG_SEPARATOR)===false){			if(!isset(self::$_configarray[$key])){				$cfg_file = PATH_CONFIG.DS.'config.'.$key.'.php';				if(file_exists($cfg_file)){					self::$_configarray[$key] = include_once($cfg_file);				}			}			return self::$_configarray[$key];		} else {			$param = explode(CONFIG_SEPARATOR,$key);			if(!isset(self::$_configarray[$param[0]])){				$cfg_file = PATH_CONFIG.DS.'config.'.$param[0].'.php';				if(file_exists($cfg_file)){					self::$_configarray[$param[0]] = include_once($cfg_file);				}			}			$tmp_config = null;			for($i=1;$i<count($param);$i++){				if($i==1){					if(isset(self::$_configarray[$param[0]][$param[1]])){						$tmp_config = self::$_configarray[$param[0]][$param[1]];					} else {						return false;					}				} else {					if(isset($tmp_config[$param[$i]])){						$tmp_config = $tmp_config[$param[$i]];					} else {						return false;					}				}			}			return $tmp_config;		}	}	/**	 * 更改某个配置项的值	 * @param string $key	 * @param mixed $value	 * @return true	 */	public static function set($key,$value){		$param = explode(CONFIG_SEPARATOR,$key);		$count_param = count($param);		switch($count_param){			case 1:self::$_configarray[$param[0]] = $value;break;			case 2:self::$_configarray[$param[0]][$param[1]] = $value;break;			case 3:self::$_configarray[$param[0]][$param[1]][$param[2]] = $value;break;			case 4:self::$_configarray[$param[0]][$param[1]][$param[2]][$param[3]] = $value;break;			case 5:self::$_configarray[$param[0]][$param[1]][$param[2]][$param[3]][$param[4]] = $value;break;			default:break;		}		return true;	}}?>

return array(	'test1' => array(		'test2' => array(			'test3' => array(				'test4' => array(					'test5' => 5555,				),			),		),	));

include_once('config.php');$config = CONFIG::get('test.test1');print_r($config);CONFIG::set('test.test1',222);$config = CONFIG::get('test.test1');print_r($config);