Foreach loop not working in codeigniter model and controller both -

my simple foreach loop working damn weird, please me solve this

here codes of controller

public function index() {     $this->load->model('file_list');     $query = 'select * `files_data` file_extension = "jpg" , size > 0 limit 0,10';     foreach($this->db->query($query)->result() $file){         $data['check'] = $this->file_list->preview_maker($file->file_id, $file->file_full_path, $file->file_extension);     }      //$this->load->view('viewtest', $data);       //$this->home_footer();  } 

and here model

public function preview_maker($file_id, $file_full_path, $extension){     if(file_exists('preview/'.$file_id.'.jpg')){         $preview = 'preview/'.$file_id.'.jpg';     } else {         if($extension == 'jpg' || $extension == 'gif' || $extension == 'png'){             $config = array(             'source_image' => 'stuff'.$file_full_path, //get original image             'new_image' => 'preview/'.$file_id.'.jpg', //save new image //need create thumbs first             'maintain_ratio' => true,             'width' => 80,             'height' => 80                     );              $this->load->library('image_lib', $config); //load library             $this->image_lib->resize(); //do whatever specified in config             $preview = '/preview/'.$file_id.'.jpg';         } elseif ($extension == 'mp3'){             $preview = '/preview/music.jpg';         } elseif ($extension == 'apk'){             $preview = '/preview/android.jpg';         } elseif ($extension == 'jar'){             $preview = '/preview/java.png';         } elseif ($extension == 'zip'){             $preview = '/preview/zip.jpg';         } elseif ($extension == '3gp' || $extension == 'mp4' || $extension == 'avi'){             $preview = '/preview/movie.png';         }     }     return $preview; } 

the problem is, foreach loop not working continious, working 1 record each refresh, next record next refresh

as @prix trying tell you,

foreach($this->db->query($query)->result() $file){     $data['check'] = $this->file_list->preview_maker($file->file_id, $file->file_full_path, $file->file_extension); } 

should read

foreach($this->db->query($query)->result() $file){     $data['check'][] = $this->file_list->preview_maker($file->file_id, $file->file_full_path, $file->file_extension); } 

otherwise keep writing on top of value.

also, read on http://php.net/manual/en/control-structures.switch.php