Adaptive payment provides facility to allow payment between sender and multiple recievers.

Steps for adaptive payment are as follows:-

1 First need to create app for paypal.

Get username,passsword,applicationid and signature recieved from paypal.

for eg.:-

 public $api_user = "****************";
public $api_pass = "***************";
public $api_sig = "**************************";
public $app_id = "******************";
public $apiUrl = 'https://svcs.sandbox.paypal.com/AdaptivePayments/';

2) Need to set the headers and pass envelope each and every time while hit request to paypal.

 $this->headers = array(
        "X-PAYPAL-SECURITY-USERID: ".$this->api_user,
        "X-PAYPAL-SECURITY-PASSWORD: ".$this->api_pass,
        "X-PAYPAL-SECURITY-SIGNATURE: ".$this->api_sig,
        "X-PAYPAL-REQUEST-DATA-FORMAT: JSON",
        "X-PAYPAL-RESPONSE-DATA-FORMAT: JSON",
        "X-PAYPAL-APPLICATION-ID: ".$this->app_id,
    );

    $this->envelope = array(
         "errorLanguage" => "en_US",
            "detailLevel" => "ReturnAll"
    );

3) Create pay request for that we need to create packet where we need to pas envelop which generate paykey unique for each and every trasaction and then finally pass it to paypal url

 $createPacket = array(
        "actionType" =>"PAY",
        "currencyCode" => "USD",
        "receiverList" => array(
            "receiver" => array(
                array(
                    "amount"=> "3.00",
                    "email"=>"kshitizmybusiness@evontech.com"
                ),
                array(
                    "amount"=> "4.00",
                    "email"=>$paypalemail
                ),
            ),
        ),
        "returnUrl" => "http://52.4.234.191/apis/successpayment/doctorid/".$doctorid."/patientid/".$patientid."",
        "cancelUrl" => "http://52.4.234.191/apis/cancelpayment",
        //"ipnNotificationUrl" =>;"http://54.160.13.227/doctorsbookingapp/apis/notifyurl/",
        "requestEnvelope" => $this->envelope
    );

    $response = $this->_paypalSend($createPacket,"Pay");

    //echo  $response['payKey'];
    $payKey=$response['payKey'];
    //set payment details//

    $detailsPacket=array(

             "requestEnvelope" =>$this->envelope,
        "payKey" => $payKey,
        "receiverOptions" => array(

            array(
                "receiver" => array("email" => "kshitizmybusiness@evontech.com"),
                "invoiceData" => array(
                        "item" => array(
                            array(

                                "name" => "product1",
                                "price" => "1.00",
                                "identifier"  => "p1"

                            ),
                            array(

                                "name" => "product2",
                                "price" => "2.00",
                                "identifier"  => "p2"

                            )
                        )
                )
            ),
            array(
                "receiver" => array("email" => $paypalemail),
                "invoiceData" => array(
                        "item" => array(
                            array(

                                "name" => "product1",
                                "price" => "2.00",
                                "identifier"  => "p1"

                            ),
                            array(

                                "name" => "product2",
                                "price" => "2.00",
                                "identifier"  => "p2"

                            )
                        )
                )
            ),

        )

    );

   $response = $this->_paypalSend($detailsPacket,"SetPaymentOptions");