campo $_FILES vuoto

[Giuseppe1987]

Buonasera a tutti ho problema con il controllo del campo $_FILES anche se vuoto inserisce comunque un record nel database

<div class="form-group">
        <label for="foto" class="col-sm-2 control-label">Immagini Correlate</label>
         <div class="col-sm-5">
               <input type="file" id="foto" accept="image/*" name="foto[]" multiple>
         </div> 
</div>

  if(!empty($_FILES['foto'])){
       $errors= array();        
        foreach($_FILES['foto']['tmp_name'] as $key => $tmp_name ){            
            $foto_name = $_FILES['foto']['name'][$key];            
            $foto_size = $_FILES['foto']['size'][$key];            
            $foto_tmp = $_FILES['foto']['tmp_name'][$key];            
            $foto_type= $_FILES['foto']['type'][$key];            
            if($foto_size > $providerMaxFileSize){                
                  $errors[]='File size must be less than 4 MB'; 
           }
            if(empty($errors)==false{
                print_r($errors);
            }else{
                if(is_dir($user_data)==false){
                    mkdir("$user_data",0777);
                 }
                if(file_exists($user_data.$foto_name)==false{
                    move_uploaded_file($foto_tmp,"$user_data".$foto_name);
                    smart_resize_image($user_data.$foto_name,//input
                        120,//larghezza
                        120,//altezza
                        true,//proporziona
                        $user_data  . "thumb-".$foto_name,//output
                        false//cancella originale
                    );
                }else{
                    $name = substr($foto_name, 0, strrpos($foto_name, '.'));
                    $new_dir="$user_data";
                    $new_name  = $name . time();
                    $ultimoPunto = strrpos($foto_name,".");
                    $estensione=substr($foto_name,$ultimoPunto + 1);
                    $foto_name = $new_name . "." . $estensione;
                    move_uploaded_file($foto_tmp, "$new_dir".$foto_name);
                    smart_resize_image($new_dir.$foto_name,//input
                        120,//larghezza
                        120,//altezza
                        true,//proporziona
                        $user_data  . "thumb-".$foto_name,//output
                        false//cancella originale 
                   );
                }
            }
            $sql_foto = "INSERT INTO immagini_corr_temp(idImage,immagine_corr) VALUES ('$idInsert','$foto_name');";
            $result_foto = mysql_query($sql_foto,$conn);
            echo mysql_error();
        }
        if(empty($errors)){
            header("location:../page/resize_image.php?id=$idInsert");
            die();
        }
    }else{
        header("location:../page/resize_image.php?id=$idInsert");
        die();
    } 

Qualcuno può dirmi dove sbaglio grazie