// Если было сохранение
if (
    (isset($_POST['submit_save'])) &&
    (isset($_POST['filename']) && $_POST['filename']!='') &&
    (isset($_POST['fio']) && $_POST['fio']!='') &&
    (isset($_POST['doljnost']) && $_POST['doljnost']!='') &&
    (isset($_POST['phone_int']) && $_POST['phone_int']!='') &&
    (isset($_POST['phone_ext']) && $_POST['phone_ext']!='') &&
    (isset($_POST['pc']) && $_POST['pc']!='') &&
    (isset($_POST['date_create']) && $_POST['date_create']!='') &&
    (isset($_POST['date_decision']) && $_POST['date_decision']!='') &&
    (isset($_POST['problem']) && $_POST['problem']!='') &&
    (isset($_POST['what_was_done'])) &&
    (isset($_POST['problem_info']) && $_POST['problem_info']!='')
    )
    {



    $filename = htmlspecialchars($_POST['filename']);
    $fio = htmlspecialchars($_POST['fio']);
    $doljnost = htmlspecialchars($_POST['doljnost']);
    $phone_int = htmlspecialchars($_POST['phone_int']);
    $phone_ext = htmlspecialchars($_POST['phone_ext']);
    $pc = htmlspecialchars($_POST['pc']);
    $problem = htmlspecialchars($_POST['problem']);
    $problem_info = htmlspecialchars($_POST['problem_info']);

    $what_was_done = htmlspecialchars($_POST['what_was_done']);

    if (isset($_POST['srochno'])) {$_POST['srochno'] = 1;} else {$_POST['srochno'] = 0;}

    $_POST['date_close'] = '';

    $json = json_encode($_POST);
    $file = fopen($filename,'w+');
    fwrite($file, $json);
    fclose($file);

    //header('Location: ./admin.php?success_save');
    exit;
    }