将数据插入数据库一次，而不是多次

Question

this is how I work to make a comment system since,

and this is how I use header to "reload" the page to only while lying info into the database.

when I sent info into the database and I click f5 then throw it into the database again. So like it is spam.

if ($stmt = $this->mysqli->prepare('INSERT INTO fms_kommentarforum (getid, brugerid, kommentar) VALUES (?, ?, ?)')) { 
$stmt->bind_param('sss', $getid, $brugerid, $kommentar);
$getid = $_GET['id']; 
$brugerid = $_SESSION["id"];
$kommentar = $_POST["beskedinfo"];
$stmt->execute();

   //reload the page again
   ob_start();
   header("Location: http://www.blabla.dk/forum/" . $_GET["id"] . "/" . $_GET["url"] . "/");
   ob_end_flush();

$stmt->close();
}

Addition the url to look like some out here; blabla.com/forum/1/test---ae-oe-aa-aa/# that's when I sent info into the database once

I would like that # does not come on when it was.

and in the form I have written action="#"

Answer 1

you could redirect the customer to the same uri with the 303 HTTP Status code.

http://en.wikipedia.org/wiki/HTTP_303

so the client can hit F5 without sending the post request again.

header("HTTP/1.1 303 See Other");
header("Location: http://example/post");