php - Paypal Automatic Payment - Incorrectly Formatted Item Amount -


i'm having bit of trouble trying figure automatic payment setting custom form.

it works fine if use buy version, need setup automatic billing.

whenever submit form, error:

the link have used enter paypal system contains incorrectly formatted item amount.

i've tried following fix it:

  • added/removed "$" before amount
  • added/removed ".00" amount
  • used parameter "amount" , "a3"
  • created button in paypal , added hidden input named hosted_button_id

here code form , query string in backend:

form

    <input type="text" name="a3" placeholder="price" value="9.99"><br>     <input name="cmd" type="hidden" value="_xclick-auto-billing" />     <input type="hidden" name="hosted_button_id" value="xxxxx">         <input name="no_note" type="hidden" value="1" />     <input name="lc" type="hidden" value="us" />     <input name="currency_code" type="hidden" value="usd" />     <input name="no_shipping" type="hidden" value="1">     <input name="bn" type="hidden" value="easyappfinder_automaticbilling_wps_us" /><br>     <input type="submit" value="submit" name="submit">

backend

$price = $_post['a3'];  $querystring .= "a3=".$price."&"; $querystring .= "p3=1&t3=m&";

any appreciated! thank in advance :)


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