Calculate the year, month and day of this week's Sunday based on the time of the day

<?php
//计算本周的星期天是什么日期
date_default_timezone_set("Asia/Shanghai");
header(&#39;content-Type: text/html; charset=utf-8&#39;);
//今天星期几
$today_xq = date(&#39;w&#39;);
//离星期天几天
$sunday = 7 - $today_xq;
 
//计算出本周星期天的日期
$date = date("Y-m-d",time()+$sunday*3600*24);
 
echo &#39;本周星期天是：&#39;.$date;
 
?>