Php 一旦我只填写金额，payu页面应该如何打开？

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      $hash         = '';
      $hashSequence = "key|txnid|amount|udf1|udf2|udf3|udf4|udf5|udf6|udf7|udf8|udf9|udf10";

      if(empty($posted['hash']) && sizeof($posted) > 0) {
        if(
              empty($posted['key'])
              || empty($posted['txnid'])
              || empty($posted['amount'])
              || empty($posted['surl'])
              || empty($posted['furl'])
    )

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因此，是否可以链接payu页面，仅填写金额

您需要通过所有必需的参数。谢谢……先生。Dilip Patelyo你需要通过所有要求的参数。谢谢你…先生。迪利普·帕特尔

    Error Reason
    One or more mandatory parameters are missing in the transaction request.
    The parameters which you have actually sent in the transaction are: 
key, txnid, amount, surl, hash.

Mandatory parameter missing from your transaction request are: 
productinfo, firstname, email, phone.