php - 是否可以使用非托管加密按钮动态覆盖金额

Question

我希望 Paypal 接受用户输入的金额。但是在重定向到 paypal 时它不接受，金额是空白的。这是否可以通过使用非托管加密按钮动态覆盖金额。任何人都可以帮助我。我很无助

这是我的表格

       <form action="https://www.sandbox.paypal.com/cgi-bin/webscr" method="post" target=_blank>
     <input type="hidden" name="cmd" value="_s-xclick">
     <input type="hidden" name="encrypted" value="<?PHP echo $encrypted; ?>">

     <div  class="paypal_list2">   
     <input type="hidden"><h3>Enter the amount</h3><br /> </div>
     <input id="total" class="paypal_input_1" type="text" value="" name="amount">

    <input class="paypal_btn" type="image"src="https://www.sandbox.paypal.com/en_US/i/btn/btn_paynowCC_LG.gif" name="submit" alt="PayPal - The safer, easier way to pay online!">                                  
     </form> 

这是我的 php 代码

           <?php

    $MY_KEY_FILE = "/home/khader/smsmobilebase/certs/private-key.pem";

    $MY_CERT_FILE = "/home/khader/smsmobilebase/certs/publi-cert.pem";

    $PAYPAL_CERT_FILE = "/home/khader/smsmobilebase/certs/paypal_cert_pem.txt";

     $OPENSSL = "/usr/bin/openssl";


     $form = array('cmd' => '_xclick','business' => 'roki_1347003608_biz@gmail.com','cert_id' => '6BPQP9KEEBCJ6','currency_code' => 'USD',
'no_shipping' => '1',
'item_name' => 'PayNow',


'cancel_return' => 'http://mobiletool.xichlomobile.com/',
'amount' => "'$amount'"
           );

  $encrypted = paypal_encrypt($form);

 function paypal_encrypt($hash)
   {

         global $MY_KEY_FILE;
         global $MY_CERT_FILE;
         global $PAYPAL_CERT_FILE;
         global $OPENSSL;


       if (!file_exists($MY_KEY_FILE)) {
      echo "ERROR: MY_KEY_FILE $MY_KEY_FILE not found\n";
    }
       if (!file_exists($MY_CERT_FILE)) {
      echo "ERROR: MY_CERT_FILE $MY_CERT_FILE not found\n";
        }
        if (!file_exists($PAYPAL_CERT_FILE)) {
       echo "ERROR: PAYPAL_CERT_FILE $PAYPAL_CERT_FILE not found\n";
         }

      $data = "";
      foreach ($hash as $key => $value) {
      if ($value != "") {
     //echo "Adding to blob: $key=$value\n";
    $data .= "$key=$value\n";
        } 
     }

     $openssl_cmd = "($OPENSSL smime -sign -signer $MY_CERT_FILE -inkey $MY_KEY_FILE " .
                "-outform der -nodetach -binary <<_EOF_\n$data\n_EOF_\n) | " .
                "$OPENSSL smime -encrypt -des3 -binary -outform pem $PAYPAL_CERT_FILE";

          exec($openssl_cmd, $output, $error);

         if (!$error) {
        return implode("\n",$output);

          print $hash;
           } else {
             return "ERROR: encryption failed";
          }
                }
             ?>   

Answer 1

每次用户更改金额时，您都可以使用Ajax调用更新encrypted字段.使用像 jQuery 这样的库很容易做到这一点:

$('input[name=amount]').change( function () {

   $.ajax({
     url: "http://mydomain.com/encrypter.php",
     type: "POST",
     data: { amount: $('input[name=amount]').val() }
   }).done(function ( data ) {
     $('input[name=enctypted]').val(data);
   });

});