PHP获得指定日期所在星期,所在月的第一天和最后一天

<p>function getdays($day){</p>	$lastday=date('Y-m-d',strtotime("$day Sunday"));<br />	$firstday=date('Y-m-d',strtotime("$lastday -6 days"));<br />	return array($firstday,$lastday);<br />}<br /><p>print_r(getdays('2012-06-2'));</p>

<p>function getdays($day){</p>	$firstday = date('Y-m-01',strtotime($day));<br />	$lastday = date('Y-m-d',strtotime("$firstday +1 month -1 day"));<br />	return array($firstday,$lastday);<br /><br />}<br />print_r(getdays('2012-06-2'));