How to obtain Pay API key from PayPal for Adaptive Payments - php

Question

I am at my wits end trying to get this work but cant understand it. I have to use Adaptive payments in a webapp which is created using cakephp framework. I have API credentials like API Username, Password and Signature. But the main problem i am facing is how to call the Pay API to get the API key which is the first thing required to make this work. I am new to this so i dont have much knowledge about this and after lot digging in google i am asking this question. Can someone please give steps for using Adaptive Payments..
Thanks in advance for your help!

Answer 1

You have to follow only three steps:
1- You send a PayRequest message to PayPal
{"returnUrl":"http://example.com/returnURL.htm", \ "requestEnvelope":{"errorLanguage":"en_US"},"currencyCode":"USD", \ "receiverList":{"receiver":[{"email":"david#example.com", \
"amount":"10.00",}]},"cancelUrl":"http://example.com/cancelURL.htm",\ "actionType":"PAY"}
2- You receive a response with a pay key.
{"responseEnvelope":\ {"timestamp":"2009-10-06T14:30:39.383-07:00","ack":"Success",\ "correlationId":"cfe8f8783f1d3","build":"DEV"},\ "payKey":"AP-17266198048308436","paymentExecStatus":"CREATED"}
3- You must redirect the sender’s browser to PayPal to approve the payment.
This would be an example code for step 1 (it works on my local server):
<?php
//turn php errors on
ini_set("track_errors", true);
//set PayPal Endpoint to sandbox
$url = trim("https://svcs.sandbox.paypal.com/AdaptivePayments/Pay");
$api_appid = 'APP-80W284485P519543T'; // para sandbox
//PayPal API Credentials
$API_UserName = "sbapi_1287090601_biz_api1.paypal.com"; //TODO
$API_Password = "1287090610"; //TODO
$API_Signature = "ANFgtzcGWolmjcm5vfrf07xVQ6B9AsoDvVryVxEQqezY85hChCfdBMvY"; //TODO
$receiver_email = "fake#email.com"; //TODO
$amount = 25; //TODO
//Default App ID for Sandbox
$API_AppID = "APP-80W284485P519543T";
$API_RequestFormat = "NV";
$API_ResponseFormat = "NV";
//Create request payload with minimum required parameters
$bodyparams = array ( "requestEnvelope.errorLanguage" => "en_US",
"actionType" => "PAY",
"cancelUrl" => "http://cancelUrl",
"returnUrl" => "http://returnUrl",
"currencyCode" => "EUR",
"receiverList.receiver.email" => $receiver_email,
"receiverList.receiver.amount" => $amount
);
// convert payload array into url encoded query string
$body_data = http_build_query($bodyparams, "", chr(38));
try
{
//create request and add headers
$params = array("http" => array(
"method" => "POST",
"content" => $body_data,
"header" => "X-PAYPAL-SECURITY-USERID: " . $API_UserName . "\r\n" .
"X-PAYPAL-SECURITY-SIGNATURE: " . $API_Signature . "\r\n" .
"X-PAYPAL-SECURITY-PASSWORD: " . $API_Password . "\r\n" .
"X-PAYPAL-APPLICATION-ID: " . $API_AppID . "\r\n" .
"X-PAYPAL-REQUEST-DATA-FORMAT: " . $API_RequestFormat . "\r\n" .
"X-PAYPAL-RESPONSE-DATA-FORMAT: " . $API_ResponseFormat . "\r\n"
));
//create stream context
$ctx = stream_context_create($params);
//open the stream and send request
$fp = #fopen($url, "r", false, $ctx);
//get response
$response = stream_get_contents($fp);
//check to see if stream is open
if ($response === false) {
throw new Exception("php error message = " . "$php_errormsg");
}
//close the stream
fclose($fp);
//parse the ap key from the response
$keyArray = explode("&", $response);
foreach ($keyArray as $rVal){
list($qKey, $qVal) = explode ("=", $rVal);
$kArray[$qKey] = $qVal;
}
//print the response to screen for testing purposes
If ( $kArray["responseEnvelope.ack"] == "Success") {
foreach ($kArray as $key =>$value){
echo $key . ": " .$value . "<br/>";
}
}
else {
echo 'ERROR Code: ' . $kArray["error(0).errorId"] . " <br/>";
echo 'ERROR Message: ' . urldecode($kArray["error(0).message"]) . " <br/>";
}
}
catch(Exception $e) {
echo "Message: ||" .$e->getMessage()."||";
}
?>
You have many examples here: https://www.x.com/developers/paypal/documentation-tools/paypal-code-samples