Upload image

if ($_POST['uploadImage']) {
    if ((_minimime($_FILES['fileName']['tmp_name']) == 'image/jpeg' || _minimime($_FILES['fileName']['tmp_name']) == 'image/png' || _minimime($_FILES['fileName']['tmp_name']) == 'image/gif') && $_FILES["fileName"]["size"] < 2000000) {
        $directory = 'upload' . DIRECTORY_SEPARATOR . $_SESSION['_userName'] . DIRECTORY_SEPARATOR;
        $fileName = md5(time() . '_' . $_FILES["fileName"]["name"]);
        $extension = str_replace('image/', '', $_FILES["fileName"]["type"]);
        $fPath = $directory . $fileName . '.' . $extension;
        move_uploaded_file($_FILES['fileName']['tmp_name'], $fPath);
        $_SESSION['_success'] .= 'Успешно качихте файл.';
        header("Location: index.php");
        exit();
    } else {
        $_SESSION['_error'] .= 'Невалидна снимка';
        header("Location: index.php");
        exit();
    }
}