PHP - Check all user reminders' dates

Question

Good,

I created a script that aims to determine whether the Column Dates ads_featured_dates are expired or not....

The problem is, the script updates the ones that are past the date, but also the ones that have not yet passed...

How do I resolve?

function check_promotions_date($con) {

  $search_expire_dates = "SELECT ads_featured_date, ads_featured, ads_id 
  FROM public_ads WHERE ads_featured = 1";
  $expire_query = $con->query($search_expire_dates);  

  while($expire_details = $expire_query->fetch_assoc()) {

  $todays_date = date("Y-m-d"); 
  $reset_days = "0000-00-00 00:00:00";       

  if($todays_date > $expire_details['ads_featured_date']) {

      $update_dates = "UPDATE public_ads SET ads_featured_date = '$reset_days', ads_featured = 0";
      $query_updated = $con->query($update_dates);
  } 

 }   

}