php 获取一年最后一周,PHP获取一年中每个星期的开始和结束日期的方法

function get_week($year) {

$year_start = $year . "-01-01";

$year_end = $year . "-12-31";

$startday = strtotime($year_start);

if (intval(date('N', $startday)) != '1') {

$startday=strtotime("nextmonday",strtotime($year_start));

//获取年第一周的日期

}

$year_mondy = date("Y-m-d", $startday);//获取年第一周的日期

$endday = strtotime($year_end);

if (intval(date('W', $endday)) == '7') {

$endday=strtotime("lastsunday",strtotime($year_end));

}

$num = intval(date('W', $endday));

for ($i = 1; $i <= $num; $i++) {

$j = $i -1;

$start_date = date("Y-m-d", strtotime("$year_mondy $j week "));

$end_day = date("Y-m-d", strtotime("$start_date +6 day"));

$week_array[$i] = array(

str_replace("-",".",$start_date),str_replace("-",".",$end_day));

}

return $week_array;

}