如果语句返回NO，则应返回YES

Question

我是PHP的新手并尝试比较IF语句中的两个日期。我的问题是IF语句在返回YES时返回NO。

$current_date = date('m-d-Y');
$today = strtotime($current_date);
$first_day_only = new DateTime('first day of this month');

//If today is greater than the first day of the month, then YES else NO
if($today > $first_day_only){
    echo "YES";
} else {
    echo "NO";
}

Answer 1

解决方案：

 $today = new DateTime();
    $first_day_only = new DateTime('first day of this month');

    //If today is greater than the first day of the month, then YES else NO
    if($today->format('Y-m-d') > $first_day_only->format('Y-m-d')){
        echo "YES";
    } else {
        echo "NO";
    }