idk.html

<?php
$name = $_POST['name'];
$rank = $_POST['rank'];
?>
<form action="https://www.paypal.com/cgi-bin/webscr" method="post" id="paypal">

 <input type="hidden" name="cmd" value="_xclick" />
  <input type="hidden" name="cbt" value="Return to example" />
 <input type="hidden" name="business" value="[email protected]" />
 <input type="hidden" name="item_name" value="Skywars2" />
 <input type="hidden" name="amount" value="0.00">
 <input type="hidden" name="button_subtype" value="services" />
 <input type="hidden" name="no_shipping" value="1">
 <input type="hidden" name="return" value='http://icrispycoder.cf/MCPE/test.php?<?php echo "name=$name&rank=$rank";?>'/>
 <input type="hidden" name="notify_url" value="http://icrispycoder.cf/MCPE/get.php"/>
 <input type="hidden" name="cancel_return" value="http://icrispycoder.cf/" />
<input type="hidden" name="currency_code" value="USD"/>
<input type="hidden" name="image_url" value="" />
<input type="hidden" id="custom" name="custom" value="Crispeh"/>
 <input type="hidden" class="btn btn-primary" style="width:100%" alt="PayPal - The safer, easier way to pay online!"/>

</form>

<script type="text/javascript">
  function myfunc () {
     var frm = document.getElementById("paypal");
     frm.submit();
  }
  window.onload = myfunc;
</script>