，值班代码如何写

求助，值班代码怎么写
最近在做单位的网站，基础很薄弱，很多东西都是边看书边百度摸索着做的
最近想要实现在主页上显示每天的值班人员，四天轮一次。
我写的代码如下。
$zbb0=array("张三","李四","王五")
$zbb1=array("张三1","李四1","王五1")
$zbb2=array("张三2","李四2","王五2")
$zbb3=array("张三3","李四3","王五3")
$date_time=getdate(time));
$yday=$date_time["yday"];
if ($yday%4==0){
echo "$zbb0";}
if ($yday%4==1){
echo "$zbb1";}
if ($yday%4==2){
echo "$zbb2";}
if ($yday%4==3){
echo "$zbb3";}
?>
大概意思就是获取当前日期是今年的第几天，再除以四得出余数，根据余数的数值显示相应的人员


------解决方案--------------------
$zbb0=array("张三","李四","王五");
$zbb1=array("张三1","李四1","王五1");
$zbb2=array("张三2","李四2","王五2");
$zbb3=array("张三3","李四3","王五3");
$date_time=getdate(time());
$yday=$date_time["yday"];
$day=$yday%4; //余数

$zb='zbb'.$day; //是哪天的变量
$zbb=$$zb;
print_r($zbb);
------解决方案--------------------

PHP code

$zb=array(1=>array("张三","李四","王五"),array("张三1","李四1","王五1"),array("张三2","李四2","王五2"),array("张三3","李四3","王五3")); $today=date("N"); switch ($today%4){    case 1:        print_r($zb[1]);        break;    case 2:        print_r($zb[2]);        break;    case 3:        print_r($zb[3]);        break;    case 4:        print_r($zb[3]);        break;        }?><br><font color="#e78608">------解决方案--------------------</font><br>$zbb = array(<br> array("张三","李四","王五"),<br> array("张三1","李四1","王五1"),<br> array("张三2","李四2","王五2"),<br> array("张三3","李四3","王五3"),<br>);<br>print_r($zbb[date('z')%4]);<br>或<br>echo join(',', $zbb[date('z')%4]);<div class="clear">
                 
              
              
        
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