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<?php
/**
* Class PayPal
*/
class PayPal {
private $API_USERNAME;
private $API_PASSWORD;
private $API_SIGNATURE;
private $PP_RETURN;
private $PP_CANCEL;
private $endpoint;
private $host;
private $gate;
function __construct($config = array() ) {
$this->endpoint = '/nvp';
$this->API_USERNAME = $config['username'];
$this->API_PASSWORD = $config['password'];
$this->API_SIGNATURE = $config['signature'];
$this->PP_RETURN = $config['return'];
$this->PP_CANCEL = $config['cancel'];
if ( $config['debug'] ) {
//sandbox
$this->host = "api-3t.sandbox.paypal.com";
$this->gate = 'https://www.sandbox.paypal.com/cgi-bin/webscr?';
} else {
$this->host = "api-3t.paypal.com";
$this->gate = 'https://www.paypal.com/cgi-bin/webscr?';
}
}
/**
* @return HTTPRequest
*/
private function response($data){
$r = new HTTPRequest($this->host, $this->endpoint, 'POST', true);
$result = $r->connect($data);
if ($result<400) return $r;
return false;
}
private function buildQuery($data = array()){
$data['USER'] = $this->API_USERNAME;
$data['PWD'] = $this->API_PASSWORD;
$data['SIGNATURE'] = $this->API_SIGNATURE;
$data['VERSION'] = '52.0';
$query = http_build_query($data);
return $query;
}
/**
* Main payment function
*/
public function doExpressCheckout($amount, $desc, $invoice='', $currency='USD'){
$data = array(
'PAYMENTACTION' =>'Sale',
'AMT' =>$amount,
'RETURNURL' => $this->PP_RETURN,
'CANCELURL' => $this->PP_CANCEL,
'DESC'=>$desc,
'NOSHIPPING'=>"1",
'ALLOWNOTE'=>"1",
'CURRENCYCODE'=>$currency,
'METHOD' =>'SetExpressCheckout');
$data['CUSTOM'] = $amount.'|'.$currency.'|'.$invoice;
if ($invoice) $data['INVNUM'] = $invoice;
$query = $this->buildQuery($data);
$result = $this->response($query);
if (!$result) return false;
$response = $result->getContent();
$return = $this->responseParse($response);
if ($return['ACK'] == 'Success') {
return $this->gate.'cmd=_express-checkout&useraction=commit&token='.$return['TOKEN'];
header('Location: '.$this->gate.'cmd=_express-checkout&useraction=commit&token='.$return['TOKEN'].'');
die();
}
return($return);
}
public function getCheckoutDetails($token){
$data = array(
'TOKEN' => $token,
'METHOD' =>'GetExpressCheckoutDetails');
$query = $this->buildQuery($data);
$result = $this->response($query);
if (!$result) return false;
$response = $result->getContent();
$return = $this->responseParse($response);
return($return);
}
public function doPayment(){
$token = $_GET['token'];
$payer = $_GET['PayerID'];
$details = $this->getCheckoutDetails($token);
if (!$details) return false;
list($amount,$currency,$invoice) = explode('|',$details['CUSTOM']);
$data = array(
'PAYMENTACTION' => 'Sale',
'PAYERID' => $payer,
'TOKEN' =>$token,
'AMT' => $amount,
'CURRENCYCODE'=>$currency,
'METHOD' =>'DoExpressCheckoutPayment');
$query = $this->buildQuery($data);
$result = $this->response($query);
if (!$result) return false;
$response = $result->getContent();
$return = $this->responseParse($response);
return($return);
}
private function getScheme() {
$scheme = 'http';
if (isset($_SERVER['HTTPS']) and $_SERVER['HTTPS'] == 'on') {
$scheme .= 's';
}
return $scheme;
}
private function responseParse($resp){
$a=explode("&", $resp);
$out = array();
foreach ($a as $v){
$k = strpos($v, '=');
if ($k) {
$key = trim(substr($v,0,$k));
$value = trim(substr($v,$k+1));
if (!$key) continue;
$out[$key] = urldecode($value);
} else {
$out[] = $v;
}
}
return $out;
}
}
?>