While writing an application on my linux machine , i used the PHP function (getmxrr) to resolve MX records, the lovely function returns an array of all the MX records that are associated with a domain name, once i moved the application to a windows machine that ran PHP 5.2.13 on Plesk 9.5 , things went bam, getmxrr is only available on Windows when you are running PHP 5.3 and above, so what to do
The answer was the PEAR package (Net_DNS), here i will document how i installed and used it so that i don’t have to look around again later
Here are the exact steps i had to follow to get things working, including the code 
1- Login to the windows server via remote desktop
2- Open the command line
3- on the command line
cd C:\Parallels\Plesk\Additional\Php
Once in that directory, you can execute (on the command line)
go-pear
You should now follow the instructions, install the extra package, and you have pear installed.
Now, a reg file should be in that same directory, double click it, enter it into the registry
Now you need to edit php.ini found at C:\Parallels\Plesk\Additional\PleskPHP5
in the path variable, add the pear folder
include_path = ".;./includes;./pear;C:\Parallels\Plesk\Additional\Php\PEAR"
Now, i restarted the server, you can restart IIS or do that IIS magic you know how to do (No, it is not /etc/init.d/IIS restart), i am just too lazy, it is probably very easy
Now, on the command line, i executed
pear install Net_DNS-1.0.7
i had to do it twice, and for some reason the first run did not find the package, second installed, very strange i think.
Now that the thing was installed, i simply ran the following code, and i got a result very similar to that of my beloved getmxrr
<?php
function extract_answers_mx($answerobj)
{
//this one extracts the MX records !
$innerobjary = $answerobj->answer;
$numofrecs = count($innerobjary);//How many records ?
$retary = array();//we store servers here...
if((is_array($innerobjary)) && (count($innerobjary) > 0))
{
foreach ($innerobjary as $thisent)
{
//we have an entry from the array !
$retary[] = $thisent->exchange;//put the exchange in the array
}
}
return $retary;//could be an empty array !
}
require_once 'Net/DNS.php';
$resolver = new Net_DNS_Resolver();
$resolver->debug = 0; // Turn on debugging output to show the query
$resolver->usevc = 1; // Force the use of TCP instead of UDP
$resolver->nameservers = array( // Set the IP addresses
'192.168.2.100', // of the nameservers
'192.168.2.101' // to query.
);
$response = $resolver->query('php.net', 'MX');
if (! $response)
{
echo "\n";
echo "ANCOUNT is 0, therefore the query() 'failed'\n";
echo "See Net_DNS_Resolver::rawQuery() to receive this packet\n";
}
$retary = extract_answers_mx($response);
foreach ($retary as $thisary)
{
print "{$thisary}\n";
}
?>
And now, i can go back to doing my magic