PHP 时间段计算，今天、本周、上周、上月 ...

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//今天$start_time=date("Y-m-d H:i:s",time());$end_time=date("Y-m-d H:i:s",mktime(0,0,0,date("m"),date("d"),date("Y")));//上周$start_time=date("Y-m-d H:i:s",mktime(0,0,0,date("m"),date("d")-date("w")+1-7,date("Y")));$end_time=date("Y-m-d H:i:s",mktime(23,59,59,date("m"),date("d")-date("w")+7-7,date("Y")));//本周$start_time=date("Y-m-d H:i:s",mktime(0,0,0,date("m"),date("d")-date("w")+1,date("Y")));$end_time=date("Y-m-d H:i:s",mktime(23,59,59,date("m"),date("d")-date("w")+7,date("Y")));//上月$start_time=date("Y-m-d H:i:s",mktime(0,0,0,date("m")-1,1,date("Y")));$end_time=date("Y-m-d H:i:s",mktime(23,59,59,date("m"),0,date("Y")));//本月$start_time=date("Y-m-d H:i:s",mktime(0,0,0,date("m"),1,date("Y")));$end_time=date("Y-m-d H:i:s",mktime(23,59,59,date("m"),date("t"),date("Y")));//本季度$monthDays=date("t",mktime(0,0,0,date('n')+(date('n')-1)%3,1,date("Y")));//本季度未最后一月天数$start_time=date('Y-m-d H:i:s',mktime(0,0,0,date('n')-(date('n')-1)%3,1,date('Y')));$end_time=date('Y-m-d H:i:s',mktime(23,59,59,date('n')+(date('n')-1)%3,$getMonthDays,date('Y')));

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