Paypal高级API付款代码范例

  1 <?php
  2 
  3  class PaypalAPI {
  4     private $api_authentication_mode = '';// 3TOKEN UNIPAY
  5     private $api_account = '';
  6     private $api_password = '';
  7     private $api_signature = '';
  8     private $api_subject = '';
  9     private $paypalPaymentUrl = 'https://www.paypal.com/webscr&cmd=_express-checkout&token=%s';
 10     private $paypalApiUrl = 'https://api-3t.paypal.com/nvp';
 11     private $paypalVersion = '60.0';
 12     private $query = array();
 13     private $goodNum = 0;
 14     private $amt = 0;
 15     private $error = '';
 16     /**
 17      * 获取支付URL
 18      */
 19     public function getPaymentUrl() {
 20         $this->initializeQuery( 'payment' );
 21         $response = $this->request( $this->query );
 22         if( !$response ) {
 23             return FALSE;
 24         } else {
 25             return vsprintf($this->paypalPaymentUrl, $response['TOKEN']);
 26         }
 27     }
 28     /**
 29      * 验证 TOKEN 是否合法
 30      */
 31     public function validateToken($token) {
 32         $this->initializeQuery( 'validate' );
 33         $this->setQuery('TOKEN', $token);
 34         return $this->request( $this->query );
 35     }
 36     /**
 37      * 验证信息
 38      */
 39     public function getError() {
 40         return $this->error;
 41     }
 42     /**
 43      * 添加商品
 44      */
 45     public function addGood($goodName, $price, $num=1, $desc='') {
 46         $this->setQuery('L_NAME'.$this->goodNum, $goodName);
 47         $this->setQuery('L_AMT'.$this->goodNum, $price);
 48         $this->setQuery('L_QTY'.$this->goodNum, $num);
 49         if( !empty($desc) ) {
 50             $this->setQuery('L_DESC'.$this->goodNum, $desc);
 51         }
 52         $this->amt += $num*$price;
 53         $this->setQuery('AMT', $this->amt);
 54         $this->goodNum++;
 55         return $this;
 56     }
 57     /**
 58      * 设置属性
 59      */
 60     public function setAttr($key, $val) {
 61         $this->$key = $val;
 62         return $this;
 63     }
 64     /**
 65      *
 66      */
 67     public function setQuery($name, $val) {
 68         $this->query[$name] = $val;
 69         return $this;
 70     }
 71     private function initializeQuery( $type ) {
 72         $query = Array();
 73         $method = Array( 'validate'=>'GetExpressCheckoutDetails', 'payment'=>'SetExpressCheckout');
 74         $this->setQuery('METHOD', isset($method[$type]) ? $method[$type] : '');
 75         $this->setQuery('VERSION', $this->paypalVersion);
 76         switch( $this->api_authentication_mode ) {
 77             case '3TOKEN':
 78                 $this->setQuery('PWD', $this->api_password);
 79                 $this->setQuery('USER', $this->api_account);
 80                 $this->setQuery('SIGNATURE', $this->api_signature);
 81                 break;
 82             case 'UNIPAY':
 83                 $this->setQuery('SUBJECT', $this->api_subject);
 84                 break;
 85             default:
 86                 throw new Exception("faild authentication of <b>{$this->api_authentication_mode}</b>");
 87                 break;
 88         }
 89     }
 90     private function request( $post ) {
 91         $ch = curl_init();
 92         $chOptions = array(
 93                 CURLOPT_URL => $this->paypalApiUrl,
 94                 CURLOPT_POST => TRUE,
 95                 CURLOPT_POSTFIELDS => is_array($post) ? http_build_query($post) : $post,
 96                 CURLOPT_VERBOSE => TRUE,
 97                 CURLOPT_SSL_VERIFYPEER => FALSE,
 98                 CURLOPT_SSL_VERIFYHOST => FALSE,
 99                 CURLOPT_RETURNTRANSFER => TRUE,
100             );
101         curl_setopt_array($ch, $chOptions);
102         $response = curl_exec($ch);
103         if( curl_errno($ch) ) {
104             $errno = curl_errno($ch);
105             $error = curl_error($ch);
106             curl_close($ch);
107             throw new Exception( " {$errno} - {$error} " );
108         }
109         curl_close($ch);
110         parse_str( urldecode($response), $response );
111         if( $response['ACK'] != 'Success' ) {
112             $this->error = $response;
113             return false;
114         }
115         return $response;
116     }
117 }
118 $paypal = new PaypalAPI();
119 $paymentUrl = $paypal->setAttr('api_account', '高级API帐号')->setAttr('api_password', 'API帐号密码而非paypal帐户密码')->setAttr('api_signature', '密钥')
120                      ->addGood('test',10)
121                      ->addGood('针织毛衣',103.5,2)
122                      ->setQuery('RETURNURL', 'http://www.baidu.com/')
123                      ->setQuery('CANCELURL', 'http://www.baidu.com/')
124                      ->getPaymentUrl();
125 if( $paymentUrl ) {
126     echo "<a href='$paymentUrl' target='_blank'>To pay</a>";
127 } else {
128     print_r($paypal->getError());
129 }