AUser0

document.querySelector('.login-form form').addEventListener('submit',function (el) {
        el.preventDefault();
        $.ajax({
            type: "POST",
            url: "./admin.php",
            data: {
                action: "administration",
                login: document.querySelector('.login-form form #login').value,
                pass: document.querySelector('.login-form form #pass').value,
            },
            success: function(data) { if (data == "OK") window.location = "admin.php";}
        });
    });

if ($_POST['action'] && $_POST['action'] === 'administration'){
    if ($_POST['login'] === $login && $_POST['pass'] === $pass){
      // тут нужно сделать всё, что нужно сделать
      // .....
      // а потом:
      echo("OK"); exit();
    }
}

echo "postgresql-10 hold" | sudo dpkg --set-selections
echo "postgresql-client-10 hold" | sudo dpkg --set-selections
echo "postgresql-client-common hold" | sudo dpkg --set-selections
echo "postgresql-common hold" | sudo dpkg --set-selections
echo "postgresql-doc-10 hold" | sudo dpkg --set-selections
echo "postgresql-server-dev-10 hold" | sudo dpkg --set-selections

sudo apt-mark hold postgresql-10
sudo apt-mark hold postgresql-client-10
sudo apt-mark hold postgresql-client-common
sudo apt-mark hold postgresql-common
sudo apt-mark hold postgresql-doc-10
sudo apt-mark hold postgresql-server-dev-10

$phone = preg_replace("/[^+0-9]/s", "", strip_tags(trim($_POST['phone'])));

$output = '';
                    foreach ($result as $row) { //здесь делаем двумерный массив
                        $found = false;
                        foreach ($result_days as $row_days) {
                            if ($row['date'] === $row_days['off_date'] && $row_days['off_id'] == 0) { //если выходной
                                $found = true;
                                // echo '<span>Выходной день</span><br>';
                                $sub_hours = (int)$row['sub_hours'];
                                $output = '
                        <tr>
                            <td>' . $row['name'] . '</td>
                            <td>' . ($sub_hours = $sub_hours - 0) . '</td>
                            <td>' . $row['date'] . '</td>
                            <td>Не рабочий день</td>
                            </tr>';
                                echo $output;
                            } else if ($row['date'] === $row_days['off_date'] && $row_days['off_id'] == 1) { //если сокращенка
                                $found = true;
                                $sub_hours = (int)$row['sub_hours'];
                                $sub_hours = $sub_hours - 7;
                                if ($sub_hours > 0) {
                                    $output = '
                        <tr>
                         <td>' . $row['name'] . '</td>
                         <td>' . $sub_hours . '</td>
                         <td>' . $row['date'] . '</td>
                         <td>Сокращенный день</td>
                         </tr>';
                                    echo $output;
                                }
                            }
                        }
                        if (!$found) { // рабочие дни
                                $sub_hours = (int)$row['sub_hours'];
                                $sub_hours = $sub_hours - 8;
                                if ($sub_hours > 0) {
                                    $output = '
                        <tr>
                        <td>' . $row['name'] . '</td>
                         <td>' . $sub_hours . '</td>
                         <td>' . $row['date'] . '</td>
                        <td>Рабочий день</td>
                        </tr>';
                                    echo $output;
                                }
                            }
                    }

if (curl_errno($ch)) { // ошибок не выдает.
                echo 'Error:' . curl_error($ch);
            }

if (curl_errno($handle["url"])) { // ошибок не выдает.
                echo 'Error:' . curl_error($handle["url"]);
            }