Zend Backend URL Posting - zend-framework

Question

I am doing Paypal IPN with Zend Framework and I would like to sent the verification url of ipn. How can I submit the back end request in Zend?
For example:
$this->_helper->layout()->disableLayout();
$formData = $this->getRequest()->getParams();
$url="www.sandbox.paypal.com?cmd=_notify-validate&transaction_subject=Zhopenemr Plan Subscription&txn_type=subscr_payment&payment_date=04:02:32 Mar 16, 2012 PDT&subscr_id=I-XFD23RR8DT6G&last_name=T P&residence_country=US&pending_reason=echeck&item_name=Zhopenemr Plan Subscription&payment_gross=4169.90&mc_currency=USD&business=tpprad_1211426184_biz#hotmail.com&payment_type=echeck&protection_eligibility=Ineligible&verify_sign=AGkW.2d.KC8Af-bSXQHFoo4g-LvfAmXI1BIIEMPHZZem9-oQOwopoG4i&payer_status=verified&test_ipn=1&payer_email=tpprad_1211426414_per#hotmail.com&txn_id=98J32260FL8930534&receiver_email=tpprad_1211426184_biz#hotmail.com&first_name=Pradeep&payer_id=LVQGVA8WRESRN&receiver_id=U6AEZTRXA6L4U&payment_status=Pending&mc_gross=4169.90&charset=windows-1252&notify_version=3.4&ipn_track_id=ff7d0a9a6f2d2";
$request = new zHTTPRequest($url, HTTP_METH_GET);
// $request->setRawPostData($xml);
$request->send();
$response = $request->getResponseBody();
$ipnval="";
foreach($formData as $key=>$value){
$ipnval.= "".$key." = ".$value." <br>";
}
I want to submit the $url to paypal and to verify the status. How can I do this in the back end?
$request = new zHTTPRequest($url, HTTP_METH_GET);
// $request->setRawPostData($xml);
$request->send();
$response = $request->getResponseBody();
This statement can do it with simple php. How can this work with Zend?
Thanks in advance.

Answer 1

// read the post from PayPal system and add 'cmd'
$req = 'cmd=_notify-validate';
foreach ($_POST as $key => $value) {
$value = urlencode(stripslashes($value));
$req .= "&$key=$value";
}
// post back to PayPal system to validate
$header .= "POST /cgi-bin/webscr HTTP/1.0\r\n";
$header .= "Content-Type: application/x-www-form-urlencoded\r\n";
$header .= "Content-Length: " . strlen($req) . "\r\n\r\n";
$fp = fsockopen ('www.paypal.com', 80, $errno, $errstr, 30);
if (!$fp) {
// HTTP ERROR
} else {
fputs ($fp, $header . $req);
while (!feof($fp)) {
$res = fgets ($fp, 1024);
if (strcmp ($res, "VERIFIED") == 0) {
// check the payment_status is Completed
// check that txn_id has not been previously processed
// check that receiver_email is your Primary PayPal email
// check that payment_amount/payment_currency are correct
// process payment
} else if (strcmp ($res, "INVALID") == 0) {
// log for manual investigation
}
}
fclose ($fp);
}
exit;