<?php
function getPreMonday($p){
$d = strtotime($p);
$day = date("w",$d);
$day = $day == 0 ? 7 : $day;
$diff_day = $day -1;
$diff_m = $d - ($diff_day * 60 * 60 * 24) - 604800;
$pre_date = date("Y-m-d",$diff_m);
echo "上周一日期为:$pre_date ,时间戳为:".strtotime($pre_date);
}
getPreMonday("2016-02-13");
?>