A simple script PHP to check and display various web server statuses:
No installation and no database is required. The first section of the script display connection status of some service running on your system. Simply open the php file and make necessary modificaiton in this region:
$services[] = array("port" => "80", "service" => "Apache", "ip" => "") ;
$services[] = array("port" => "21", "service" => "FTP", "ip" => "") ;
$services[] = array("port" => "3306", "service" => "MYSQL", "ip" => "") ;
$services[] = array("port" => "22", "service" => "Open SSH", "ip" => "") ;
$services[] = array("port" => "9091", "service" => "Transmission", "ip" => "") ;
You can comment out service that you don't have or add new service use the similar syntax. The second section of the script display system load status, uptime, resource usage information and top Resource usage process.
The last section of the script display network traffic statistic. Those information is gather by vnstat (http://humdi.net/vnstat/), you will need vnstat installed and properly configured before hand. 
You can view various information gather and display by vnstat. The option you pass to vnstat will by specified HTTP GET parameter in your request URL. To view
vnstat -m
information, you will request the URL
checkup.php?showtraffic=m