There is a contact form which current action is http://www.siteA.com/ContactInfo.php, it sends fields and values.
In ContactInfo.php, i just catch the values and se
I'd encourage you to try the Snoopy Class. It's really rather simple:
"Jonathan","lname"=>"Sampson");
$snoopy = new Snoopy();
$snoopy->httpmethod = "POST";
$snoopy->submit("http://www.siteB.com/Reg.aspx", $vars);
# Use the following if you need to view the results
# print $snoopy->results;
?>