You are not wrapping your columns inside brackets, plus you're missing a backtick around edate
$db = dblogin();
$stmt = $db->prepare("INSERT INTO `tor_request` (`name`,`sdate`,`edate`,`reason`,`comment`) VALUES (?,?,?,?,?)");
echo var_export($stmt,true);
Add error reporting to the top of your file(s) which will help during production testing.
error_reporting(E_ALL);
ini_set('display_errors', 1);
mysqli_report(MYSQLI_REPORT_ERROR | MYSQLI_REPORT_STRICT);
Error reporting related links: