$h = date("H", time());

 

      if ($h > 00 && $h <= 05) {

      $time = "Laba naktis";

      } elseif ($h > 05 && $h <= 10) {

      $time = "Labas rytas";

 } elseif ($h > 10 && $h <= 18) {

      $time = "Laba diena";} elseif ($h > 18 && $h <= 21) {

      $time = "Labas vakaras";

     } elseif ($h > 21 && $h <= 23) {

      $time = "Laba naktis";

      }

 

 

 

	  echo $time;