获取当天或某个日期是星期几

<?php
function getWeekName($data,$format = '星期')
{
	$week   =  date( "D ",$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 '今天是：'.getWeekName(time(),'星期');
echo '<br>';
echo '今天是：'.getWeekName(time(),'礼拜');
echo '<br>';
echo '2010-12-12是：'.getWeekName(strtotime('2010-12-12'),'礼拜');
?>