用php获取本周,上周,本月,上月,本季度日期的代码

echo date("Ymd",strtotime("now")), "\n";
echo date("Ymd",strtotime("-1 week Monday")), "\n";
echo date("Ymd",strtotime("-1 week Sunday")), "\n";
echo date("Ymd",strtotime("+0 week Monday")), "\n";
echo date("Ymd",strtotime("+0 week Sunday")), "\n";


//date(n) 第几个月
//date("w") 本周周几
//date("t") 本月天数

echo <br>上周:<br>;
echo date("Y-m-d H:i:s",mktime(0, 0 , 0,date("m"),date("d")-date("w")+1-7,date("Y"))),"\n";
echo date("Y-m-d H:i:s",mktime(23,59,59,date("m"),date("d")-date("w")+7-7,date("Y"))),"\n";
echo <br>本周:<br>;
echo date("Y-m-d H:i:s",mktime(0, 0 , 0,date("m"),date("d")-date("w")+1,date("Y"))),"\n";
echo date("Y-m-d H:i:s",mktime(23,59,59,date("m"),date("d")-date("w")+7,date("Y"))),"\n";

echo <br>上月:<br>;
echo date("Y-m-d H:i:s",mktime(0, 0 , 0,date("m")-1,1,date("Y"))),"\n";
echo date("Y-m-d H:i:s",mktime(23,59,59,date("m") ,0,date("Y"))),"\n";
echo <br>本月:<br>;
echo date("Y-m-d H:i:s",mktime(0, 0 , 0,date("m"),1,date("Y"))),"\n";
echo date("Y-m-d H:i:s",mktime(23,59,59,date("m"),date("t"),date("Y"))),"\n";

$getMonthDays = date("t",mktime(0, 0 , 0,date(n)+(date(n)-1)%3,1,date("Y")));//本季度未最后一月天数
echo <br>本季度:<br>;
echo date(Y-m-d H:i:s, mktime(0, 0, 0,date(n)-(date(n)-1)%3,1,date(Y))),"\n";
echo date(Y-m-d H:i:s, mktime(23,59,59,date(n)+(date(n)-1)%3,$getMonthDays,date(Y))),"\n";