Subversion Repositories php_library

<?php

if(!strlen(session_id())){

	session_start();

}

Class PayPalInterface{

	var $amount;

	var $currency = 'USD';

	var $paymentType = 'Sale';

	var $returnURL;

	var $cancelURL;

	var $API_Endpoint;

	var $version = '2.3';

	var $API_UserName;

	var $API_Password;

	var $API_Signature;

	var $USE_PROXY = FALSE;

	var $PROXY_HOST;

	var $PROXY_PORT;

	var $PROXY_PORT = '808';

	var $gv_ApiErrorURL;

	var $sBNCode = 'PP-ECWizard';

	function PayPalInterface($sandbox=FALSE){

		if($sandbox){

			$this->API_Endpoint = "https://api-3t.sandbox.paypal.com/nvp";

			$this->PAYPAL_URL = "https://www.sandbox.paypal.com/webscr?cmd=_express-checkout&token=";

		}else{

			$this->API_Endpoint = "https://api-3t.paypal.com/nvp";

			$this->PAYPAL_URL = "https://www.paypal.com/cgi-bin/webscr?cmd=_express-checkout&token=";

		}

	}

	function set($details){

		foreach($details AS $k=>$v){

			$this->$k = $v;

		}

	}

	function process(){

		$success = FALSE;

		$resArray = $this->CallShortcutExpressCheckout();

		$ack = strtoupper($resArray["ACK"]);

		if($ack=="SUCCESS"){

			$this->RedirectToPayPal($resArray["TOKEN"]);

		}else{

			return FALSE;

		}

	}

	function RedirectToPayPal($token){

		header("Location: ".$this->PAYPAL_URL.$token);

	}

	function CallShortcutExpressCheckout(){

		// Construct the parameter string that describes the SetExpressCheckout API call in the shortcut implementation

		$nvpstr = '&Amt='.$this->amount.'&PAYMENTACTION='.$this->paymentType.'&ReturnUrl='.$this->returnURL.'&CANCELURL='.$this->cancelURL.'&CURRENCYCODE='.$this->currency;

		$_SESSION["currencyCodeType"] = $this->currency;

		$_SESSION["PaymentType"] = $this->paymentType;

		//'---------------------------------------------------------------------------------------------------------------

		//' Make the API call to PayPal

		//' If the API call succeded, then redirect the buyer to PayPal to begin to authorize payment.

		//' If an error occured, show the resulting errors

		//'---------------------------------------------------------------------------------------------------------------

		$resArray = $this->hash_call('SetExpressCheckout', $nvpstr);

		$ack = strtoupper($resArray["ACK"]);

		if($ack == "SUCCESS"){

			$token = urldecode($resArray["TOKEN"]);

			$_SESSION['TOKEN']=$token;

		}

		return $resArray;

	}

	function hash_call($methodName,$nvpStr){

		//setting the curl parameters.

		$ch = curl_init();

		curl_setopt($ch, CURLOPT_URL, $this->API_Endpoint);

		curl_setopt($ch, CURLOPT_VERBOSE, 1);

		//turning off the server and peer verification(TrustManager Concept).

		curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, FALSE);

		curl_setopt($ch, CURLOPT_SSL_VERIFYHOST, FALSE);

		curl_setopt($ch, CURLOPT_RETURNTRANSFER,1);

		curl_setopt($ch, CURLOPT_POST, 1);

	    //if USE_PROXY constant set to TRUE in Constants.php, then only proxy will be enabled.

	   //Set proxy name to PROXY_HOST and port number to PROXY_PORT in constants.php

		if($this->USE_PROXY){

			curl_setopt ($ch, CURLOPT_PROXY, $this->PROXY_HOST. ":" . $this->PROXY_PORT);

		}

		//NVPRequest for submitting to server

		$nvpreq = 'METHOD='.urlencode($methodName).'&VERSION='.urlencode($this->version).'&PWD='.urlencode($this->API_Password).'&USER='.urlencode($this->API_UserName).'&SIGNATURE='.urlencode($this->API_Signature).$nvpStr.'&BUTTONSOURCE='.urlencode($this->sBNCode);

		//setting the nvpreq as POST FIELD to curl

		curl_setopt($ch, CURLOPT_POSTFIELDS, $nvpreq);

		//getting response from server

		$response = curl_exec($ch);

		//convrting NVPResponse to an Associative Array

		$nvpResArray = $this->deformatNVP($response);

		$nvpReqArray = $this->deformatNVP($nvpreq);

		$_SESSION['nvpReqArray'] = $nvpReqArray;

		if(curl_errno($ch)){

			// moving to display page to display curl errors

			$_SESSION['curl_error_no']=curl_errno($ch) ;

			$_SESSION['curl_error_msg']=curl_error($ch);

			//Execute the Error handling module to display errors.

		}else{

			//closing the curl

			curl_close($ch);

		}

		return $nvpResArray;

	}

	function deformatNVP($nvpstr){

		$intial=0;

		$nvpArray = array();

		while(strlen($nvpstr)){

			//postion of Key

			$keypos= strpos($nvpstr,'=');

			//position of value

			$valuepos = strpos($nvpstr,'&') ? strpos($nvpstr,'&'): strlen($nvpstr);

			/*getting the Key and Value values and storing in a Associative Array*/

			$keyval=substr($nvpstr,$intial,$keypos);

			$valval=substr($nvpstr,$keypos+1,$valuepos-$keypos-1);

			//decoding the respose

			$nvpArray[urldecode($keyval)] =urldecode( $valval);

			$nvpstr=substr($nvpstr,$valuepos+1,strlen($nvpstr));

		}

		return $nvpArray;

	}

	function getStatus(){

		$token = "";

		if(isset($_REQUEST['token'])){

			$token = $_REQUEST['token'];

		}

		// If the Request object contains the variable 'token' then it means that the user is coming from PayPal site.

		if($token != ""){

			$resArray = GetShippingDetails($token);

			$ack = strtoupper($resArray["ACK"]);

			return $ack;

		}

	}

}

//A debugging function

function pr($r){

	echo '<pre>';

	print_r($r);

	echo '</pre>';

}

?>