<?php require_once 'imports.php'; // Create a monitor... $monitor = new SpeedMonitor(); // Create a speedomter and register the monitor to it... $speedo = new Speedometer(); $speedo->addObserver($monitor); // Drive at different speeds... $speedo->setCurrentSpeed(71); ?> <html> <body> <!-- Drive at different speeds --> <p><?php echo 'Too fast? = ' . ($monitor->isSpeeding() ? 'true' : 'false'); ?> </p> </body> </html>