PHP \DesignPatterns\Structural\Bridge\Service \DesignPatterns\Structural\Bridge\PlainTextFormatter \DesignPatterns\Structural\Bridge\Formatter \DesignPatterns\Structural\Bridge\Service \DesignPatterns\Structural\Bridge\PingService \DesignPatterns\Structural\Bridge\HelloWorldService \DesignPatterns\Structural\Bridge\HtmlFormatter Fields Constants Constructors Methods private