if elseif 选择语句 上午好!

 1 <?php 
 2 
 3 $hour=date("H");
 4 if($hour<6){
 5     echo "凌晨好";
 6 }elseif($hour>6 && $hour<9){
 7     echo "早上好";
 8 }elseif($hour>9 && $hour <12){
 9     echo "上午好";
10 }elseif($hour>12 && $hour<14){
11     echo "中午好";
12 }elseif($hour>14 && $hour<17){
13     echo "下午好";
14 }elseif($hour>17 && $hour<19){
15     echo "傍晚好";
16 }elseif($hour>19 && $hour<22){
17     echo "晚上好";
18 }else{
19     echo "小心有鬼！";
20 }
21 
22 ?>

 1 <?php 
 2 
 3 $hour=date("H");
 4 
 5 
 6 if($hour < 6){
 7     echo "凌晨好！";
 8 }elseif( $hour<9){
 9     echo "早上好";
10 }elseif($hour <12){
11     echo "上午好";
12 }elseif($hour<14){
13     echo "中午好";
14 }elseif($hour<17){
15     echo "下午好";
16 }elseif($hour<19){
17     echo "傍晚好";
18 }elseif($hour<22){
19     echo "晚上好";
20 }else{
21     echo "小心有鬼！";
22 }
23 
24 ?>