Foreach loop not working in codeigniter model and controller both - codeigniter

Question

My simple foreach loop is working damn weird, please help me to solve this
here are my codes of controller
public function index()
{
$this->load->model('file_list');
$query = 'SELECT * FROM `files_data` WHERE file_extension = "jpg" and size > 0 LIMIT 0,10';
foreach($this->db->query($query)->result() as $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 is 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 as new image //need to 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 is not working continious, its working for 1 record only for each refresh, then next record next refresh

Answer 1

as #prix was trying to tell you,
foreach($this->db->query($query)->result() as $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() as $file){
$data['check'][] = $this->file_list->preview_maker($file->file_id, $file->file_full_path, $file->file_extension);
}
otherwise you just keep writing over the top of your value.
Also, read up on http://php.net/manual/en/control-structures.switch.php

Answer 2

Actually this thing worked for me...
i had problem about generating thumb
$config = array(
'source_image' => 'stuff'.$file_full_path, //get original image
'new_image' => 'preview/'.$file_id.'.jpg', //save as new image //need to create thumbs first
'maintain_ratio' => true,
'width' => 80,
'height' => 80
);
$this->image_lib->initialize($config);
$resize = $this->image_lib->resize();
$this->image_lib->clear(); //do whatever specified in config
$preview = '/preview/'.$file_id.'.jpg';
i didnt use
$this->image_lib->clear();
last time