Empty variables causing strict php errors

Not sure if this is the write answer as i didnt really look at how this function was being used just at fixing the error but something like this should work

public static function fromString( $string ) {
		$url = new WordPressHTTPS_Url;
		@preg_match_all('/((http|https):\/\/[^\'"]+)[\'"\)]?/i', $string, $url_parts);
		if ( isset($url_parts[1][0]) ) {
			if ( $url_parts = parse_url( $url_parts[1][0] ) ) {
				$url->setScheme(@ !empty($url_parts['scheme']) ? $url_parts['scheme'] : NULL);
				$url->setUser(@ !empty($url_parts['user']) ? $url_parts['user'] : NULL);
				$url->setPass(@ !empty($url_parts['pass']) ? $url_parts['pass'] : NULL);
				$url->setHost(@ !empty($url_parts['host']) ? $url_parts['host'] : NULL);
				$url->setPort(@ !empty($url_parts['port']) ? $url_parts['port'] : NULL);
				$url->setPath(@ !empty($url_parts['path']) ? $url_parts['path'] : NULL);
				$url->setQuery(@ !empty($url_parts['query']) ? $url_parts['query'] : NULL);
				$url->setFragment(@ !empty($url_parts['fragment']) ? $url_parts['fragment'] : NULL);
				return $url;
			}
		} else {
			 return false;
		}
		return $url;
	}

That function is in lib\WordPressHTTPS\Url.php

Fixes the Undefined index: errors

http://ww.wp.xz.cn/plugins/dynamic-widgets/