php根據年份和周數擷取日期的方法

function getWeekDate($year,$weeknum){ $firstdayofyear=mktime(0,0,0,1,1,$year); $firstweekday=date('N',$firstdayofyear); $firstweenum=date('W',$firstdayofyear); if($firstweenum==1){ $day=(1-($firstweekday-1))+7*($weeknum-1); $startdate=date('Y-m-d',mktime(0,0,0,1,$day,$year)); $enddate=date('Y-m-d',mktime(0,0,0,1,$day+6,$year)); }else{ $day=(9-$firstweekday)+7*($weeknum-1); $startdate=date('Y-m-d',mktime(0,0,0,1,$day,$year)); $enddate=date('Y-m-d',mktime(0,0,0,1,$day+6,$year)); } return array($startdate,$enddate); } ?> 複製代碼 您可能感興趣的文章：php number_format()保留小數點後幾位PHP小數點後保留幾位的簡單樣本php小數取整的方法(附執行個體)php小數點後取兩位的三種實現方法

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