libs/Yii/collections/CConfiguration.php

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<?php
/**
 * This file contains classes implementing configuration feature.
 *
 * @author Qiang Xue <qiang.xue@gmail.com>
 * @link http://www.yiiframework.com/
 * @copyright Copyright &copy; 2008-2011 Yii Software LLC
 * @license http://www.yiiframework.com/license/
 */


/**
 * CConfiguration represents an array-based configuration.
 *
 * It can be used to initialize an object's properties.
 *
 * The configuration data may be obtained from a PHP script. For example,
 * <pre>
 * return array(
 *     'name'=>'My Application',
 *     'defaultController'=>'index',
 * );
 * </pre>
 * Use the following code to load the above configuration data:
 * <pre>
 * $config=new CConfiguration('path/to/config.php');
 * </pre>
 *
 * To apply the configuration to an object, call {@link applyTo()}.
 * Each (key,value) pair in the configuration data is applied
 * to the object like: $object->$key=$value.
 *
 * Since CConfiguration extends from {@link CMap}, it can be
 * used like an associative array. See {@link CMap} for more details.
 *
 * @author Qiang Xue <qiang.xue@gmail.com>
 * @version $Id$
 * @package system.collections
 * @since 1.0
 */
class CConfiguration extends CMap
{
	/**
	 * Constructor.
	 * @param mixed $data if string, it represents a config file (a PHP script returning the configuration as an array);
	 * If array, it is config data.
	 */
	public function __construct($data=null)
	{
		if(is_string($data))
			parent::__construct(require($data));
		else
			parent::__construct($data);
	}

	/**
	 * Loads configuration data from a file and merges it with the existing configuration.
	 *
	 * A config file must be a PHP script returning a configuration array (like the following)
	 * <pre>