Question

New to learning PHP form validation on same page. Please advise as to why my data might not be posting to the database. After filling out the form, it redirects to thank you page without sending data. Thanks!

http://pastebin.com/3T1W9Krx

Edit: Now that I know where my problem was, I have updated the Pastebin file to show the working code, which validates in the same page and checks the database for duplicate email addresses.

I was able to use Rick Kuipers suggestion below to find this error. I was trying to include a column for the primary key under VALUES, however I only needed the values for the INSERT keys, not ID or timestamp, as ID is set to auto-increment.

$sql = "INSERT INTO table (last_name, first_name, age) 

VALUES (". 
                        PrepSQL($last_name) . ", " .
                        PrepSQL($first_name) . ", " .
                        PrepSQL($age) . ")";

        mysql_query($sql);
        header("Location: volthankyou.php");
        exit();
    }
}

Answer 1

This could be because of a problem with your query.

Try doing the following:

echo mysql_error($db);
//header("Location: volthankyou.php");

This should display the error if there is any.