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PHP整合PayPal支付

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Release: 2016-06-13 09:01:53
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PHP整合PayPal支付

 简单整理一下PHP项目整合PayPal支付功能。

一、表单的构建:

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二、IPN验证部分

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class paypal {

  var $ipn_data = array(); // array contains the POST values for IPN

  var $fields = array(); // 提交给Paypal的表单参数,例:item_name=iPhone 6,quantity=1,amount=499,currency_code=USD等所有表单信息,

                     // 在调用验证IPN之前事先需要初始化好

  var $paypal_url = 'https://www.paypal.com/cgi-bin/webscr';//sandbox:https://www.sandbox.paypal.com/cgi-bin/webscr

  

  function validate_ipn() {//验证IPN

      // parse the paypal URL

      $url_par=parse_url($this->paypal_url);

      // generate the post string from the _POST vars aswell as load the

      // _POST vars into an arry so we can play with them from the calling

      // script.

      $post_str = '';

      foreach ($_POST as $field=>$value) {

        $this->ipn_data["$field"] = $value;

        $post_str .= $field.'='.urlencode(stripslashes($value)).'&';

      }

      $post_str.="cmd=_notify-validate"; // append ipn command

      // open the connection to paypal

      $fp = fsockopen($url_par[host],"80",$errnum,$errstr,30);

      if(!$fp) {

        // could not open the connection.

        return false;

      } else {

        // Post the data back to paypal

        fputs($fp, "POST ".$url_par[path]." HTTP/1.1\r\n");

        fputs($fp, "Host: ".$url_par[host]."\r\n");

        fputs($fp, "Content-type: application/x-www-form-urlencoded\r\n");

        fputs($fp, "Content-length: ".strlen($post_str)."\r\n");

        fputs($fp, "Connection: close\r\n\r\n");

        fputs($fp, $post_str . "\r\n\r\n");

        // loop through the response from the server and append to variable

        while(!feof($fp)) {

          $this->validate_ipn_response .= fgets($fp, 1024);

        }

        fclose($fp); // close connection

     }

    if (eregi("VERIFIED",$this->validate_ipn_response)) {

      return true;

    } else {

      return false;

    }

  }

}

?>

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