用strtotime()和date()函数算出2019年9月的周日日期

• strtotime

<?php
$firstsunday = strtotime(date('Y-m-01'));
$thisy = intval(date('m'));
$diffdays=0;
$count = 0;
if (date('w',strtotime(date('Y-m-01')))!=0)
{
      $diffdays=7-date('w',strtotime(date('Y-m-01')));
}
else{
    $count++;
}
$startdate =strtotime(date('Y-m-01')."+".$diffdays."day");
while (True)
{
    if ($thisy!=intval(date('m',$startdate)))
    {
            break;
    }
    echo date('Y-m-d',$startdate)."\n";
    $startdate = strtotime(date('Y-m-d',strtotime(date('Y-m-d',$startdate)."+7 day")));
    //
}

结果

2019-09-01
2019-09-08
2019-09-15
2019-09-22
2019-09-29

 

来源：https://www.cnblogs.com/saintdingspage/p/11561246.html