本文共计625个文字，预计阅读时间需要3分钟。
1. 获取上个月的第一天和最后一天：echo date('Y-m-01', strtotime('-1 month'));echo \n;echo date('Y-m-t', strtotime('-1 month'));echo \n;
2. 获取本月的第一天和最后一天：$BeginDate=date('Y-m-01', strtotime(date('Y-m-d')));
1.获取上个月第一天及最后一天.
echo date('Y-m-01',strtotime('-1 month'));
echo "<br/>";
echo date('Y-m-t',strtotime('-1 month'));
echo "<br/>";
2.获取当月第一天及最后一天.
$BeginDate=date('Y-m-01',strtotime(date("Y-m-d")));
echo $BeginDate;
echo "<br/>";
echo date('Y-m-d',strtotime("$BeginDate +1 month -1 day"));
echo "<br/>";
3.获取当天年份、月份、日及天数.
echo " 本月共有:".date("t")."天";
echo " 当前年份".date('Y');
echo " 当前月份".date('m');
echo " 当前几号".date('d');
echo "<br/>";
4.使用函数及数组来获取当月第一天及最后一天,比较实用
function getthemonth($date)
{
$firstday = date('Y-m-01',strtotime($date));
$lastday = date('Y-m-d',strtotime("$firstday +1 month -1 day"));
return array($firstday,$lastday);
}
$today = date("Y-m-d");
$day=getthemonth($today);
echo "当月的第一天: ".$day[0]." 当月的最后一天: ".$day[1];
echo "<br/>";
<?PHP
echo date("Ymd",strtotime("now")),"\n";
echo date("Ymd",strtotime("-1 week Monday")),strtotime("-1 week Sunday")),strtotime("+0 week Monday")),strtotime("+0 week Sunday")),"\n";
echo "*********第几个月:";
echo date('n');
echo "*********本周周几:";
echo date("w");
echo "*********本月天数:";
echo date("t");
echo "*********";
echo '<br>上周起始时间:<br>';
echo date("Y-m-d H:i:s",mktime(0,date("m"),date("d")-date("w")+1-7,date("Y"))),"\n";
echo date("Y-m-d H:i:s",mktime(23,59,date("d")-date("w")+7-7,"\n";
echo '<br>本周起始时间:<br>';
echo date("Y-m-d H:i:s",date("d")-date("w")+1,date("d")-date("w")+7,"\n";
//从第几周找出该周的开始日期和结束日期
$dayNumber = date('W') * 7;
$weekDayNumber = date("w",1,$dayNumber,date("Y")));//当前周的第几天
$startNumber = $dayNumber - $weekDayNumber;
echo date("Y-m-d",$startNumber + 1,date("Y")));//开始日期
echo date("Y-m-d",$startNumber + 7,date("Y")));//结束日期
echo '<br>上月起始时间:<br>';
echo date("Y-m-d H:i:s",date("m")-1,"\n";
echo '<br>本月起始时间:<br>';
echo date("Y-m-d H:i:s",date("t"),"\n";
$season = ceil((date('n'))/3);//当月是第几季度
echo '<br>本季度起始时间:<br>';
echo date('Y-m-d H:i:s',$season*3-3+1,date('Y'))),"\n";
echo date('Y-m-d H:i:s',$season*3,date('t',"\n";
$season = ceil((date('n'))/3)-1;//上季度是第几季度
echo '<br>上季度起始时间:<br>';
echo date('Y-m-d H:i:s',"\n";
?>
