HomePHP Page 5 - Adding Methods to the Query Processor in PHP
Gluing the pieces together: listing the full source code of the "QueryProcessor" class - PHP
Over this second article in a series covering network programming in PHP, you will learn how to run popular Windows network monitoring utilities, such as the “ping,” “netstat” and “ipconfig” programs, by adding some new methods to the “QueryProcessor” class introduced in the previous article.
Undoubtedly, you'll have a better idea of how the new methods fit into the structure of the "QueryProcessor" class if you see its full source code, so here is the complete definition of this class:
class QueryProcessor{ private $host; private $services=array ('http','https','ftp','telnet','imap','smtp','nicname', 'gopher','finger','pop3','www'); private $ports=array(21,23,25,43,70,79,80,110,143,443); public function __construct($host='myhost.com'){ $this->host=$host; } // get IP address public function getIp(){ if(!$ip=gethostbyname($this->host)){ throw new Exception('Error resolving host IP address.'); } return $ip; } // get list of IP addresses public function getIpList(){ if(!$ips=implode(' - ',gethostbynamel($this->host))){ throw new Exception('Error getting list of IP addresses for the provided hostname.'); } return $ips; } // get host name public function getHost(){ if(!$host=gethostbyaddr($this->getIp())){ throw new Exception('Error resolving host name.'); } return $host; } // get TCP ports of Internet services public function getServicePorts(){ $output='Retrieving services ports...Please wait.<br />'; foreach($this->services as $service){ if(!$port=getservbyname($service,'tcp')){ $output.='Error retrieving port of service '.$service.'<br />'; } else{ $output.='Service '.$service. ' runs on TCP port :'. $port.'<br />'; } } return $output; } // get Services by TCP ports public function getServiceNames(){ $output='Retrieving services names...Please wait.<br />'; foreach($this->ports as $port){ if(!$service=getservbyport($port,'tcp')){ $output.='Error retrieving service name on port '.$port.'<br />'; } else{ $output.='TCP Port '.$port. ' is used by service :'. $service.'<br />'; } } return $output; } // execute 'ipconfig' command on Windows systems public function IpConfig(){ $output='Running ipconfig command...Please wait.<br />'; exec('ipconfig',$lines); foreach($lines as $line){ $output.=$line.'<br />'; } return $output; } // execute 'ping' command on Windows systems public function Ping(){ $output='Running ping command...Please wait.<br />'; exec('ping '.$this->host,$lines); foreach($lines as $line){ $output.=$line.'<br />'; } return $output; } // execute 'netstat' command on Windows systems public function Netstat(){ $output='Running netstat command...Please wait.<br />'; exec('netstat',$lines); foreach($lines as $line){ $output.=$line.'<br />'; } return $output; } // get MX records on Windows systems public function getMXRecordsWin(){ $output='Retrieving MX Records...please wait.<br />'; exec("nslookup -type=mx $this->host",$mxhosts); foreach($mxhosts as $mxhost){ $output.=$mxhost.'<br />'; } return $output; } }
Now that you've seen the complete source code of the "QueryProcessor" class, below I coded an example that demonstrates how to use some of these new methods:
// instantiate 'QueryProcessor' object $queryProc=new QueryProcessor('google.com'); // display MX records echo $queryProc->getMXRecordsWin(); /* displays the following output:
google.com MX preference = 10, mail exchanger = smtp1.google.com google.com MX preference = 10, mail exchanger = smtp2.google.com google.com MX preference = 10, mail exchanger = smtp3.google.com google.com MX preference = 10, mail exchanger = smtp4.google.com
google.com nameserver = ns3.google.com google.com nameserver = ns4.google.com google.com nameserver = ns1.google.com google.com nameserver = ns2.google.com smtp1.google.com internet address = 216.239.57.25 smtp2.google.com internet address = 64.233.167.25 smtp3.google.com internet address = 64.233.183.25 smtp4.google.com internet address = 66.102.9.25 ns1.google.com internet address = 216.239.32.10 ns2.google.com internet address = 216.239.34.10 ns3.google.com internet address = 216.239.36.10 ns4.google.com internet address = 216.239.38.10
*/
// display 'netstat' results echo $queryProc->NetStat(); /* displays the following output:
Running netstat command...Please wait.
Active Connections
Proto local address remote address status TCP mywebserver:http localhost:3677 ESTABLISHED TCP mywebserver:3677 localhost:http ESTABLISHED
*/
// display 'ping' results echo $queryProc->Ping(); /* displays the following output: pinging google.com [72.14.207.99] with 32 bytes of data:
Response from 72.14.207.99: bytes=32 time=247ms TTL=237 Response from 72.14.207.99: bytes=32 time=234ms TTL=237 Response from 72.14.207.99: bytes=32 time=234ms TTL=237 Response from 72.14.207.99: bytes=32 time=234ms TTL=238
Ping statistics for 72.14.207.99: Packets: sent = 4, received = 4, lost = 0 (0% lost), Approximated response time en milliseconds: Min = 234ms, Max = 247ms, Average = 237ms
*/
To wrap up
Over this second article in the series, you learned how to run popular Windows network monitoring utilities, such the "ping", "netstat" and "ipconfig" programs, by adding some new methods to the "QueryProcessor" class. Additionally, you saw how to retrieve the list of MX records corresponding to a given Internet host, by using the "exec()" PHP function, which comes in handy for running system commands.
Nevertheless, my introduction to PHP programming has not finished yet. In the last tutorial, I'll be defining a few additional methods for the "QueryProcessor" class that can be useful for scanning TCP ports, finding DNS records and much more. Just don't miss it!
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