PHP CURL post returning results but I need empty results

I'm doing curl post but the problem is that I need to return empty results so I can echo out another value for my ajax request results:

below is the code:

$ch = curl_init("http://www.rankreport.com.au/ajax/add_new_lead");
                    curl_setopt($ch, CURLOPT_POST, 1);
                    curl_setopt($ch, CURLOPT_POSTFIELDS, "lead_company_id=1&lead_business=1234&lead_first_name=asdf&lead_website=12314.com&lead_phone=1234&lead_email=test@test.com&lead_package=seo");
                    curl_setopt($ch, CURLOPT_FOLLOWLOCATION, 1);
                  开发者_如何学Python  curl_exec($ch);
                    curl_close($ch);

                    echo 'error 3';

When I do this, I'm getting below results:

{"lead_date":1315637343,"lead_company_id":"1","lead_business":"1234","lead_first_name":"asdf","lead_last_name":"","lead_website":"12314.com","lead_phone":"1234","lead_email":"test@test.com","lead_package":"seo"} 3

How do set curl options so that it doesn't return any curl results?

Set CURLOPT_RETURNTRANSFER:

curl_setopt($ch, CURLOPT_RETURNTRANSFER, TRUE);
$result = curl_exec($ch);

Use CURLOPT_RETURNTRANSFER = true to have the returned content as a return value ($ch) instead of output.