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upload 함수(Controller)

/**
 * Upload한 이미지를 저장 하고 사이즈가 정사각형인 이미지로 썸네일 만든다.
 * @param String $upload_file
 * @param String $target_file
 * @param String $s
 */
function img_upload($upload_file, $target_file, $s = 90) {
 $ret = FALSE;
  
 // 이미지 업로드 설정
 $config = array(
  'upload_path' => 'image/',
  'overwrite' => TRUE,
  'allowed_types' => 'gif|jpg|png',
  'file_name' => $target_file
 );
  
 $this->load->library('upload', $config);
  
 if ($this->upload->do_upload($upload_file)) {
  list($w, $h) = getimagesize($config['upload_path'] . $target_file);
  $master_dim = $w > $h ? 'height' : 'width';
   
  $config = array(
   'image_library' => 'gd2',
   'source_image' => $config['upload_path'] . $target_file,
   'new_image' => $config['upload_path'] . 'thumb/'  . $target_file,
   'master_dim' => $master_dim,
   'width' => $s,
   'height' => $s
  );
 
  $this->load->library('image_lib', $config);
  $this->image_lib->resize();
 
  list($w, $h) = getimagesize($config['new_image']);
  $config = array(
   'image_library' => 'gd2',
   'source_image' => $config['new_image'],
   'maintain_ratio' => FALSE,   
   'width' => $s,
   'height' => $s,
   'y_axis' => round(($h - $s) / 2),
   'x_axis' => round(($w - $s) / 2)
  );
   
  $this->image_lib->clear();
  $this->image_lib->initialize($config);
  $this->image_lib->crop();
   
  $ret = TRUE;
 }
  
 return $ret;
}​ 
 
 
​$this->img_upload('upimg', 'test.jpg', 120);