php Get the day of the week that today or a certain date is

<?php
function getWeekName($data,$format = &#39;星期&#39;)
{
    $week   =  date( "D ",$data);
    switch($week)
    {
        case "Mon ":
            $current   =   $format."一";
            break;
        case "Tue ":
            $current   =   $format."二";
            break;
        case "Wed ":
            $current   =   $format."三";
            break;
        case "Thu ":
            $current   =   $format."四";
            break;
        case "Fri ":
            $current   =   $format."五";
            break;
        case "Sat ":
            $current   =   $format."六";
            break;
        case "Sun ":
            $current   =   $format."日";
            break;
    }
    return $current;
}
 
echo &#39;今天是：&#39;.getWeekName(time(),&#39;星期&#39;);
echo &#39;<br>&#39;;
echo &#39;今天是：&#39;.getWeekName(time(),&#39;礼拜&#39;);
echo &#39;<br>&#39;;
echo &#39;2010-12-12是：&#39;.getWeekName(strtotime(&#39;2010-12-12&#39;),&#39;礼拜&#39;);
?>