Question

I want to only fetch data which is related to foreach value.but em getting empty result.$userid is an array, thats why i need to use for each .Please correctify this or suggest any alternative approach.

   $user_id=$_POST['uid'];
    foreach($user_id as $user_idf){

    $sql=mysqli_query($db3->connection,"select *  from  profile  where uid='$user_idf'");
    while($row=mysqli_fetch_array($sql)){
        $num=$row['country'];

        echo $num;
    }
    }

Answer 1

The one query to base is prefered. Also you’ve forgotten field country in you query. Try this way:

   $user_id=$_POST['uid'];
   $user_id = is_array($user_id)?$user_id:(array)$user_id;
   if(!empty($user_id)) {
       $sql=mysqli_query(
           $db3->connection,
           "select name, country from  profile 
            where uid in (".implode(', ', $user_id).")"
       );
       while($row=mysqli_fetch_array($sql)){
           $num=$row['country'];
           echo $num;
       }
   }