date_diff（）期望参数2为DateTimeInterface，给定字符串

Question

when i am trying to execute this getting error like date_diff() expects parameter 2 to be DateTimeInterface, string given

    $date2=date_create("2017-03-15");
    date_format($date2,"Y/m/d");
    $date1=date('Y/m/d');
    $diff=date_diff($date2,$date1);
    echo $diff;

Answer 1

Both variables should be in the same format. Just try this:

$date2=date_create("2017-03-15");
$date1=date_create(date('Y-m-d'));
$diff=date_diff($date2,$date1);
echo $diff->days;