Необрабатывается sql запрос

У меня есть sql запрос,но он не обрабатывается, посмотрите пожалуйста и подскажите в чём ошибка

  $currentTime = (int)date('H');
  $currentdate = date("Y-m-d");
  $visible = 1;
for($i = 1; $i < 15; $i++){
  $time_set1 = find_all_time_f($i);
  $arrayOfFotball1 = mysqli_fetch_assoc($time_set1);
  $time_count1 = mysqli_num_rows($time_set1);
  $time_f = $arrayOfFotball1['time'];
  $rdate_f = $arrayOfFotball1['rdate'];

  if(strtotime($currentdate) > $rdate_f)  //HERE we should check Date if date < then  change visibility
  {
  //2.Perfor database querys
    //exit("Error");
    $query  = "UPDATE sport_football SET ";
    $query .= "visible = {$visible} "; 
    $query .= "WHERE time = {$currentdate} ";
    $result = mysqli_query($connection, $query);
  }else if($currentTime > $time_f){
    $query  = "UPDATE sport_football SET ";
    $query .= "visible = {$visible} "; 
    $query .= "WHERE time = {$currentdate} ";
    $result = mysqli_query($connection, $query);
  }//if statement
}//for loop
//check function for football