Created
May 9, 2012 17:01
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Paypal Caller Service Sample Code
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<?php | |
/**************************************************** | |
CallerService.php | |
This file uses the constants.php to get parameters needed | |
to make an API call and calls the server.if you want use your | |
own credentials, you have to change the constants.php | |
Called by TransactionDetails.php, ReviewOrder.php, | |
DoDirectPaymentReceipt.php and DoExpressCheckoutPayment.php. | |
****************************************************/ | |
require_once $_SERVER['DOCUMENT_ROOT'].'/paypal/constants.php'; | |
if(defined('API_USERNAME')) | |
$API_UserName=API_USERNAME; | |
if(defined('API_PASSWORD')) | |
$API_Password=API_PASSWORD; | |
if(defined('API_SIGNATURE')) | |
$API_Signature=API_SIGNATURE; | |
if(defined('API_ENDPOINT')) | |
$API_Endpoint =API_ENDPOINT; | |
$version=VERSION; | |
if(defined('SUBJECT')) | |
$subject = SUBJECT; | |
// below three are needed if used permissioning | |
if(defined('AUTH_TOKEN')) | |
$AUTH_token= AUTH_TOKEN; | |
if(defined('AUTH_SIGNATURE')) | |
$AUTH_signature=AUTH_SIGNATURE; | |
if(defined('AUTH_TIMESTAMP')) | |
$AUTH_timestamp=AUTH_TIMESTAMP; | |
function nvpHeader() | |
{ | |
global $API_Endpoint,$version,$API_UserName,$API_Password,$API_Signature,$nvp_Header, $subject, $AUTH_token,$AUTH_signature,$AUTH_timestamp; | |
$nvpHeaderStr = ""; | |
if(defined('AUTH_MODE')) { | |
//$AuthMode = "3TOKEN"; //Merchant's API 3-TOKEN Credential is required to make API Call. | |
//$AuthMode = "FIRSTPARTY"; //Only merchant Email is required to make EC Calls. | |
//$AuthMode = "THIRDPARTY";Partner's API Credential and Merchant Email as Subject are required. | |
$AuthMode = "AUTH_MODE"; | |
} | |
else { | |
if((!empty($API_UserName)) && (!empty($API_Password)) && (!empty($API_Signature)) && (!empty($subject))) { | |
$AuthMode = "THIRDPARTY"; | |
} | |
else if((!empty($API_UserName)) && (!empty($API_Password)) && (!empty($API_Signature))) { | |
$AuthMode = "3TOKEN"; | |
} | |
elseif (!empty($AUTH_token) && !empty($AUTH_signature) && !empty($AUTH_timestamp)) { | |
$AuthMode = "PERMISSION"; | |
} | |
elseif(!empty($subject)) { | |
$AuthMode = "FIRSTPARTY"; | |
} | |
} | |
switch($AuthMode) { | |
case "3TOKEN" : | |
$nvpHeaderStr = "&PWD=".urlencode($API_Password)."&USER=".urlencode($API_UserName)."&SIGNATURE=".urlencode($API_Signature); | |
break; | |
case "FIRSTPARTY" : | |
$nvpHeaderStr = "&SUBJECT=".urlencode($subject); | |
break; | |
case "THIRDPARTY" : | |
$nvpHeaderStr = "&PWD=".urlencode($API_Password)."&USER=".urlencode($API_UserName)."&SIGNATURE=".urlencode($API_Signature)."&SUBJECT=".urlencode($subject); | |
break; | |
case "PERMISSION" : | |
$nvpHeaderStr = formAutorization($AUTH_token,$AUTH_signature,$AUTH_timestamp); | |
break; | |
} | |
return $nvpHeaderStr; | |
} | |
/** | |
* hash_call: Function to perform the API call to PayPal using API signature | |
* @methodName is name of API method. | |
* @nvpStr is nvp string. | |
* returns an associtive array containing the response from the server. | |
*/ | |
function hash_call($methodName,$nvpStr) | |
{ | |
//declaring of global variables | |
global $API_Endpoint,$version,$API_UserName,$API_Password,$API_Signature,$nvp_Header, $subject, $AUTH_token,$AUTH_signature,$AUTH_timestamp; | |
// form header string | |
$nvpheader=nvpHeader(); | |
//setting the curl parameters. | |
$ch = curl_init(); | |
curl_setopt($ch, CURLOPT_URL,$API_Endpoint); | |
curl_setopt($ch, CURLOPT_VERBOSE, 1); | |
//turning off the server and peer verification(TrustManager Concept). | |
curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, TRUE); | |
curl_setopt($ch, CURLOPT_SSL_VERIFYHOST, 2); | |
curl_setopt($ch, CURLOPT_RETURNTRANSFER,1); | |
curl_setopt($ch, CURLOPT_POST, 1); | |
//in case of permission APIs send headers as HTTPheders | |
if(!empty($AUTH_token) && !empty($AUTH_signature) && !empty($AUTH_timestamp)) | |
{ | |
$headers_array[] = "X-PP-AUTHORIZATION: ".$nvpheader; | |
curl_setopt($ch, CURLOPT_HTTPHEADER, $headers_array); | |
curl_setopt($ch, CURLOPT_HEADER, false); | |
} | |
else | |
{ | |
$nvpStr=$nvpheader.$nvpStr; | |
} | |
//if USE_PROXY constant set to TRUE in Constants.php, then only proxy will be enabled. | |
//Set proxy name to PROXY_HOST and port number to PROXY_PORT in constants.php | |
if(USE_PROXY) | |
curl_setopt ($ch, CURLOPT_PROXY, PROXY_HOST.":".PROXY_PORT); | |
//check if version is included in $nvpStr else include the version. | |
if(strlen(str_replace('VERSION=', '', strtoupper($nvpStr))) == strlen($nvpStr)) { | |
$nvpStr = "&VERSION=" . urlencode($version) . $nvpStr; | |
} | |
$nvpreq="METHOD=".urlencode($methodName).$nvpStr; | |
//setting the nvpreq as POST FIELD to curl | |
curl_setopt($ch,CURLOPT_POSTFIELDS,$nvpreq); | |
//getting response from server | |
$response = curl_exec($ch); | |
if (curl_errno($ch) == 60) { | |
curl_setopt($ch, CURLOPT_CAINFO, | |
dirname(__FILE__) . '/cacert.pem'); | |
$response = curl_exec($ch); | |
} | |
//convrting NVPResponse to an Associative Array | |
$nvpResArray=deformatNVP($response); | |
$nvpReqArray=deformatNVP($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); | |
$location = "/paypal/edited/APIError.php"; | |
header("Location: $location"); | |
} else { | |
//closing the curl | |
curl_close($ch); | |
} | |
return $nvpResArray; | |
} | |
/** This function will take NVPString and convert it to an Associative Array and it will decode the response. | |
* It is usefull to search for a particular key and displaying arrays. | |
* @nvpstr is NVPString. | |
* @nvpArray is Associative Array. | |
*/ | |
function deformatNVP($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 $nvpArray; | |
} | |
function formAutorization($auth_token,$auth_signature,$auth_timestamp) | |
{ | |
$authString="token=".$auth_token.",signature=".$auth_signature.",timestamp=".$auth_timestamp ; | |
return $authString; | |
} | |
?> |
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