关于星期几，日期的处理函数。100分求教

myDate(20110923);
function myDate($date)
{
    $arr = array('1'=>'一','2'=>'二','3'=>'三','4'=>'四','5'=>'五','6'=>'六','7'=>'日');
    $todayTime = strtotime($date);
    for($i=0; $i<=3; $i++) {
       echo date('Ymd', $todayTime) . '   星期' . $arr[date('N', $todayTime)] . '<br/>';
       $todayTime += 60*60*24;
    }
}
/**
输出结果：
20110923 星期五
20110924 星期六
20110925 星期日
20110926 星期一
*/

$Time=strtotime('now');
/**
 *使用方法 Time 当前时间 4 需要的天数范围
 */
Prdata($Time, 4);

//============================
function Getmydata($Time,$Stop){
    $Rdata=array();
    for ($i=1;$i<$Stop;$i++){
        $Rdata[]=$Time+24*60*60*$i;
    }
    return $Rdata;
}

function Prdata($Time,$Stop){
    foreach(Getmydata($Time,$Stop) as $value){
        echo date('Ymd',$value).' '.GetWeek($value);
    }
}
function GetWeek($Time){
    $week   =   date( "D ",   $Time);
    switch   ($week)
    {
        case   "Mon ":
            $current   =   "星期一 ";
            break;
        case   "Tue ":
            $current   =   "星期二 ";
            break;
        case   "Wed ":
            $current   =   "星期三 ";
            break;
        case   "Thu ":
            $current   =   "星期四 ";
            break;
        case   "Fri ":
            $current   =   "星期五 ";
            break;
        case   "Sat ":
            $current   =   "星期六 ";
            break;
        case   "Sun ":
            $current   =   "星期日 ";
            break;
    }
    return $current;
}