failed upload image to database

So i wrote this script and i kept getting failed to upload message, please point out where i did wrong and please give a good example for the script. The image wasn't uploaded to database, but it was moved to the directory 'upload/'. And the $start & $stop variable was in date. I'd stuck in this one for several days. Here's the code.

include "../config/database.php";

$title = $_POST['title'];
$id = $_POST['id'];
$genre = $_POST['genre'];
$start = $_POST['start'];
$stop = $_POST['stop'];
$description = $_POST['description'];

$target_dir = "upload/";
$target_file = $target_dir . basename($_FILES["image"]["name"]);

$uploadOK = 1;

$imagetype = pathinfo($target_file, PATHINFO_EXTENSION);

if (isset($_POST["submit"])) {
    $check = getimagesize($_FILES["image"]["tmp_name"]);
    if ($check !== false) {
        echo "File is an image -" . $check["mime"] . ".";
        $uploadOK = 1;
    } else{
        echo "File isn't an image.";
        $uploadOK = 0;
    }
}

if (file_exists($target_file)) {
    echo "Sorry, file is already exist.";
    $uploadOK = 0;
}
if ($_FILES["image"]["size"] > 5000000) {
    echo "Sorry, file is too large.";
    $uploadOK = 0;
}

if ($imagetype != "jpg" && $imagetype != "jpeg" && $imagetype != "png" && $imagetype != "gif") {
    echo "Sorry, only JPEG, JPG, PNG and GIF are allowed.";
    $uploadOK = 0;
}

if ($uploadOK == 0) {
    echo "Failed to upload.";
} else {
    if(move_uploaded_file($_FILES["image"]["tmp_name"] , $target_file)){

        $query = mysql_query("INSERT INTO anidata (id, title, image, genre, start, stop, description) VALUES ('$title', '$id', '$target_file', '$genre', '$start', '$stop', '$description') ");
        $uploadOK = 1;

        if ($query) {
            header("Location: view.php");
        }else{
            echo "<p>Failed to upload</p>";
        }
    }
}

I really appreciate any help, thank you :)