<?PHP
echo "<pre>";
echo date("Y-m-d",strtotime("now")),"\n";
echo "<pre>";
echo date("Y-m-d",strtotime("-1 week Monday")),strtotime("-1 week Sunday")),strtotime("+0 week Monday")),strtotime("+0 week Sunday")),"\n";
echo "<pre>";
echo "*********第几个月:";
echo date('n');
echo "<pre>";
echo "*********本周周几:";
echo date("w");
echo "<pre>";
echo "*********本月天数:";
echo date("t");
echo "<pre>";
echo '<br>上周:<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 "<pre>";
echo '<br>本周:<br>';
echo date("Y-m-d H:i:s",date("d")-date("w")+1,date("d")-date("w")+7,"\n";
echo "<pre>";
echo '<br>上上月:<br>';
echo date("Y-m-d H:i:s",date("m")-2,1,date("m")-1,"\n";
echo "<pre>";
echo '<br>上月:<br>';
echo date("Y-m-d H:i:s","\n";
echo "<pre>";
echo '<br>本月:<br>';
echo date("Y-m-d H:i:s",date("t"),"\n";
echo "<pre>";
echo "<pre>";
$season = ceil((date('n'))/3)-2;//上季度是第几季度
echo '<br>上上季度:<br>';
echo date('Y-m-d H:i:s',$season*3-3+1,date('Y'))),"\n";
echo date('Y-m-d H:i:s',$season*3,date('t',"\n";
echo "<pre>";
echo "<pre>";
$season = ceil((date('n'))/3)-1;//上季度是第几季度
echo '<br>上季度:<br>';
echo date('Y-m-d H:i:s',"\n";
echo "<pre>";
echo $season = ceil((date('n'))/3);//当月是第几季度
echo '<br>本季度:<br>';
echo date('Y-m-d H:i:s',"\n";
$season = ceil((date('n'))/3)+1;//当月是第几季度
echo '<br>下季度:<br>';
echo date('Y-m-d H:i:s',"\n";
echo "<pre>";
?>