This package offers a portscan utility to determine if a host is reachable on a certain (TCP) port or not.

A status page has to report if certain hosts are online. Using the normal methods, each host will be checked sequentially, which is slow. Thanks to this class, all of the checks are performed asynchronously, and the status of all hosts can be checked in a non-blocking way.

• setTimeout($float) : timeout for all checks to terminate
• addTest($host, $port) : add a host to test
• scan() : start scan
• results : variable that holds the results

$ss = new PortScan\Scanner;
$ss->setTimeout(2);

$ss->addTest('yahoo.com', 80);
$ss->addTest('google.com', 80);
$ss->addTest('1.2.3.4', 80);

$ss->scan();
var_dump($ss->results);

array(3) {
  ["google.com"]=>
  array(1) {
    [80]=>     ## Holds the port
    int(0)     ## Holds the error number (0 = port open)
  }
  ["yahoo.com"]=>
  array(1) {
    [80]=>
    int(0)
  }
  ["1.2.3.4"]=>
  array(1) {
    [80]=>
    int(10060)
  }
}

For an overview of error numbers, look here.

• callbacks per test/globally
• UDP scan (although I'm not sure how to do this reliably)

multi threaded port scan status check checker scanner open closed non-blocking