php switch语句根据天数判断

Question

就是有个变量$a如果a等于1,就进行case1如果a大于1且小等于3,就进行case2如果a大于3,就进行case3我写了之后怎么都执行case1去了,不管a大于多少,都执行case1,赐教了,该怎么写break语句我写的,大神们写个例句出来,谢谢

Answer 1

var iMonth=5;
var quarter=""
switch(iMonth){
case 1:;
case 2:;
case 3:;
quarter="chunji";
break;
case 4:;
case 5:;
case 6:;
quarter="xiaji";
break;
case 7:;
case 8:;
case 9:;
quarter="qiuji";
break;
case 10:;
case 11:;
case 12:;
quarter="dongji";
break;
}
document.write(quarter)

Answer 2

<?php
$b = 3;
$a = 1;
$c=$b-$a;
switch($c){
case 1:echo '这是一';break;
case 2:echo '这是二';break;
//........
}
?>