php获取上周四时间

Question

php怎么获取当前日上周四的时间，求教，谢谢！

Answer 1

$last_thur = new DateTime(date("Ymd"));
$last_thur->sub(new DateInterval('P'.abs ( (3+date("N"))).'D'));echo date("Y-m-d",$last_thur->getTimestamp());

Answer 2

echo date('Y-m-d', strtotime('Last Thursday'));//2017-08-03

Answer 3

function getLastWeekDay($flag=0){
    $dt = new DateTime(date('Y-m-d'));
    $timestamp = $dt->format('U');
    $day = (new DateTime('@'.$timestamp))->format('w');
    if($day>=$flag){
        $date_timestamp = mktime(0,0,0,date('m',$timestamp),date('d',$timestamp)-($day-$flag),date('Y',$timestamp));
    }elseif($day<$flag){
        $date_timestamp = mktime(0,0,0,date('m',$timestamp),date('d',$timestamp)-7+$flag-$day,date('Y',$timestamp));
    }
    return (new DateTime('@'.$date_timestamp))->format('Y-m-d');
}// 上周日到六的日期
for($i=0; $i<7; $i++){
    echo getLastWeekDay($i).'<br>';
}