echo '<div class="header">';

 $date = date ("H");

if (6 <=  $date and 11 >= $date) {echo 'Xayirli tong,';}

else if (12 <= $date and 18 >= $date) {echo 'Xayirli kun,';}

else if (19 <= $date and 21 >= $date) {echo 'Xayirli kech,';}

else {echo 'Xayirli tun,';}

echo ' ' . ($user_id ? '<b>' . $login . '</b>!' : $lng['guest'] . '!') . '<br/>

Bugun: <b>' . date("d.m.Y") . '</b><br/>

Soat: <b>' . date("H:i", time() + $set['timeshift'] * 3600) . '</b></div>';