//by www.qzphp.cn
/**
* 获取最近七天所有日期
*/
function get_weeks($time = '', $format='Y-m-d'){
$time = $time != '' ? $time : time();
//组合数据
$date = [];
for ($i=1; $i<=7; $i++){
$date[$i] = date($format ,strtotime( '+' . $i-7 .' days', $time));
}
return $date;
}执行结果
//by www.qzphp.cn print_r(get_weeks()); Array ( [1] => 2018-06-13 [2] => 2018-06-14 [3] => 2018-06-15 [4] => 2018-06-16 [5] => 2018-06-17 [6] => 2018-06-18 [7] => 2018-06-19 )

