我的ipn脚本在通过paypal ipn模拟器测试时有效，但不是沙盒交易，这是我的paypal按钮
<form name="_xclick" action="https://www.sandbox.paypal.com/cgi-bin/webscr"
method="post">
<input type="hidden" name="cmd" value="_xclick">
<input type="hidden" name="business" value="rslege_1359359492_biz@gmail.com">
<input type="hidden" name="currency_code" value="USD">
<input type="hidden" name="item_name" value="Playershare">
<input type="hidden" name="amount" value="9.99">
<input type="hidden" name="return" value="http://rspsdb.org/test.php">
<input type="hidden" name="notify_url" value="http://rspsdb.org/paypal/ipn.php">
<input type="image" src="http://www.paypal.com/en_US/i/btn/btn_buynow_LG.gif"
border="0" name="submit" alt="Make payments with PayPal - it's fast, free and secure!">
</form>