public static function getMetaTags( $string, $transformKeys = 0 )
	{
		$metaTags	= array();
		preg_match_all( "@<meta.*/?>@", $string, $tags );
		if( !$tags )
			return array();
		foreach( $tags[0] as $tag )
		{
			$attributes	= Alg_SgmlTagReader::getAttributes( $tag, self::TRANSFORM_LOWERCASE );	//  read HTML Tag Attributes
			if( !isset( $attributes['content'] ) )
				continue;
			if( isset( $attributes['content'] ) && isset( $attributes['name'] ) )
				$key	= $attributes['name'];
			if( isset( $attributes['content'] ) && isset( $attributes['http-equiv'] ) )
				$key	= $attributes['http-equiv'];
			if( $transformKeys == self::TRANSFORM_LOWERCASE )
				$key	= strtolower( $key );
			else if( $transformKeys == self::TRANSFORM_UPPERCASE )
				$key	= strtoupper( $key );
			$metaTags[$key]	= $attributes['content'];
		}
		return $metaTags;
	}