无法在数据库中上传照片

Question

我试图在数据库中上传照片，但是它没有更新，甚至没有上传。

这是我的php

if(isset($_POST['upload_photo'])){
// $profielfoto = $_POST['profielfoto_upload'];

$imagefileHandle = fopen($_FILES['profielfoto_upload']['name'], 'rb');
$imageData = fread($imagefileHandle, filesize($_FILES['profielfoto_upload']['tmp_name']));
fclose($imagefileHandle);

$query = $conn->prepare('UPDATE forum_inhoud SET profielfoto = :pf WHERE id = :id');
$query->execute([
    ':pf' => $imageData,
    ':id' => $_SESSION['user_id']
]);

$_SESSION['success'] = 'Uw gegevens zijn geupdate, U moet alleen opnieuw inloggen';
header("Location: ../../profile.php");
exit(0);
} 

这是我的html

<form action="app/instellingen/crud_instellingen.php" method="post">
    <div class="form-group row">
        <div class="col-sm-12">
            <input type="file" name="profielfoto_upload" class="form-control" ><!--accept="image/png,image/gif,image/jpeg,image/jpg"-->
        </div>
    </div>  
    <div class="form-group row text-center">
        <div class="col-sm-12">
            <button type="submit" name="upload_photo" class="btn btn-primary">Save Changes</button>
        </div>
    </div>
</form>

你们能帮我吗？