php获取本年、本月、本周时间戳和日期格式

获取时间戳：

//获取今日开始时间戳和结束时间戳
$time1 = strtotime(date('Y-m-d 00:00:00',time()));
$time2 = strtotime(date('Y-m-d 23:59:59',time()));

//昨天时间戳
$time1 = strtotime(date('Y-m-d 00:00:00',time()-3600*24));
$time2 = strtotime(date('Y-m-d 23:59:59',time()-3600*24));

//本周时间戳
$time1 = mktime(0,0,0,date('m'),date('d')-date('N')+1,date('y'));
$time2 = mktime(23,59,59,date('m'),date('d')-date('N')+7,date('Y'));

//上周时间戳
$time1 = mktime(0,0,0,date('m'),date('d')-date('N')-6,date('Y'));
$time2 = mktime(23,59,59,date('m'),date('d')-date('N'),date('Y'));

//本月时间戳
$time1 = mktime(0,0,0,date('m'),1,date('Y'));
$time2 = mktime(23,59,59,date('m'),date('t'),date('Y'));

//上月时间戳
$time1 = strtotime(date('Y-m-01 00:00:00',strtotime('-1 month')));
$time2 = strtotime(date("Y-m-d 23:59:59", strtotime(-date('d').'day')));

//获取今天时间
$time1=date('Y-m-d 00:00:00',time());
$time2=date('Y-m-d 23:59:59',time());

//获取昨天时间
$time1=date('Y-m-d 00:00:00',time()-3600*24);
$time2=date('Y-m-d 23:59:59',time()-3600*24);

//获取本周时间
$time1 = date("Y-m-d H:i:s",mktime(0, 0 , 0,date("m"),date("d")-date("N")+1,date("Y")));
$time2 = date("Y-m-d H:i:s",mktime(23,59,59,date("m"),date("d")-date("N")+7,date("Y")));

//获取上周时间
$time1 = date('Y-m-d H:i:s', mktime(0,0,0, date('m'), date('d')-date('N')-6,date('Y')));
$time2 = date('Y-m-d H:i:s', mktime(23,59,59, date('m'), date('d')-date('N'),date('Y')));


//本月起始时间
echo date("Y-m-d H:i:s",mktime(0, 0 , 0,date("m"),1,date("Y")));
echo date("Y-m-d H:i:s",mktime(23,59,59,date("m"),date("t"),date("Y")));


//上月起始时间
echo date("Y-m-d H:i:s",mktime(0, 0 , 0,date("m")-1,1,date("Y")));
echo date("Y-m-d H:i:s",mktime(23,59,59,date("m") ,0,date("Y")));


//本年起始时间
echo date(‘Y-01-01’); 
echo date(‘Y-12-31’);

//获取当天年份，月份，以及当月天数
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');