php原生获取上周,本周,上月,本月,本季度,上季度案例

<?php
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";
 
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 '上周起始时间:';
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 '本周起始时间:';
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 '上月起始时间:';
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 '本月起始时间:';
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";
 
$season = ceil((date('n'))/3);//当月是第几季度
echo '本季度起始时间:';
echo date('Y-m-d H:i:s', mktime(0, 0, 0,$season*3-3+1,1,date('Y'))),"n";
echo date('Y-m-d H:i:s', mktime(23,59,59,$season*3,date('t',mktime(0, 0 , 0,$season*3,1,date("Y"))),date('Y'))),"n";
 
$season = ceil((date('n'))/3)-1;//上季度是第几季度
echo '上季度起始时间:';
echo date('Y-m-d H:i:s', mktime(0, 0, 0,$season*3-3+1,1,date('Y'))),"n";
echo date('Y-m-d H:i:s', mktime(23,59,59,$season*3,date('t',mktime(0, 0 , 0,$season*3,1,date("Y"))),date('Y'))),"n";
?>