<?
// Подпись формы платежа
$hash = sha1($pay_id.$pay_cost.$SECRET_KEY);

// Подпись с данными
$sign = base64_encode($pay_id.':'.$hash);
?>
<form id="payment" name="payment" action="<?= text($_SERVER['REQUEST_URI'])?>" method="POST">    
  <?= __('Номер телефона')?>: (<?= __('Например')?> +79251234567)
  <input type="text" name="to" value="<?= (isset($_SESSION['i_phone']) ? text($_SESSION['i_phone']) : '+7')?>"><br />
  <input type="hidden" name="shop_qiwi" value="1">
  <input type="hidden" name="from" value="<?= $SHOP_ID?>">    
  <input type="hidden" name="currency" value="RUB">     
  <input type="hidden" name="comm" value="<?= $pay_desc?>">    
  <input type="hidden" name="txn_id" value="<?= $sign?>"> 
  <input type="hidden" name="lifetime" value="<?= date("Y-m-d\TH:i:s", time()+(60 * 60 * 24))?>"> 
  <input type="hidden" name="successUrl" value="http://<?= $_SERVER['HTTP_HOST']?>/payment?id=<?= $pay_id?>&amp;identifier=<?= $paytype?>&amp;request=success">    
  <input type="hidden" name="failUrl" value="http://<?= $_SERVER['HTTP_HOST']?>/payment?id=<?= $pay_id?>&amp;identifier=<?= $paytype?>&amp;request=fail">    
  <input type="hidden" name="summ" value="<?= $pay_cost?>">  
  <button type="submit" class="btn btn-success"><?= __('Оплатить')?> <?= $pay_cost?> руб.</button>
</form>