PayPal IPN not return VERIFIED to 0
问题 I have asked my paypal api to send email of $res to see what the response is. Inside of the while (!feof($fp)) {} This is what i'm getting from $res to my email HTTP/1.0 400 Bad Request Server: BigIP Connection: close Content-Length: 19 Invalid Host header This is my paypal code. $req = 'cmd=_notify-validate'; $req .= payment_safe_check ($_POST); $header .= "POST /cgi-bin/webscr HTTP/1.0\r\n"; $header .= "Content-Type: application/x-www-form-urlencoded\r\n"; $header .= "Content-Length: " .