PHP takes out the timestamp of Monday and Sunday_PHP Tutorial

function getmonsun(){
    $curtime=time();
      
    $curweekday = date('w');

     //为0是 就是 星期七
    $curweekday = $curweekday?$curweekday:7;


    $curmon = $curtime - ($curweekday-1)*86400;
    $cursun = $curtime + (7 - $curweekday)*86400;
     
    $cur['mon'] = $curmon;
    $cur['sun'] = $cursun;

    return $cur;
}
    $cur = getmonsun();

    echo date('y-m-d',$cur['mon']);
    echo "rn";
    echo date('y-m-d',$cur['sun']);
 
//方法二 利用php strtotime函数

 echo strtotime('last monday');
 echo &#39;<br />&#39;;
 echo strtotime(&#39;next sunday&#39;);