Drupal 7 - 以编程方式上传图像

Question

我想在自定义模块中上传图片。如果需要，必须永久保存图像并重命名。稍后我希望能够在表单上的某处或我想要的任何位置显示图像。

我当前的代码：

function my_module_name_new_form()
{
 ....

$form['icon'] = array
(
    '#type' => 'file',
    '#title' => t('Icon'),
    '#description' => t('Click "Chose File" to select an image to upload.')
);

 ....
}

在提交钩子中我有：

// Icon
$filename = $form_state['values']['icon'];
$dest = file_build_uri($filename); 
file_save_data('My data', $dest, FILE_EXISTS_RENAME); 

什么都没有发生...我也找不到任何与 Drupal 7.x 兼容的模块，它们以某种方式让这里的生活更轻松。

解决方案：

//----------------------------
// Icon
//----------------------------  
$dest_dir = file_default_scheme() . '://';// Note: file_directory_path() was removed in Drupal 7.x. // $dest_dir contains the destination directory for the file. 

$validators = array('file_validate_extensions' => array('jpg png gif'));

//Save file
if ($file = file_save_upload('icon', $validators, $dest_dir))
{
    $filename = $file->filename;        
    $file_content = file_get_contents($dest_dir.$filename); // Fatal error: Cannot access empty property in C:\xampp\htdocs\drupal\modules\custom\achievements\achievements.module on line 446
}
else
{
    form_set_error('icon', 'Could not upload file.');
}
// To display the image: // die('<IMG SRC="'.file_create_url($dest_dir.$filename).'"/>');
//----------------------------  

Answer 1

我最近不得不这样做。这就是我最终得到的。即不使用drupal表单将图像保存到图像字段。

if(isset($_FILES['image'])){

    $node = node_load($nid);

    //Get the uploaded file from the temp directory.            
    $image = file_get_contents($_FILES['image']['tmp_name']);

    //Create the directory if it does not already exist, otherwise check the permissions
    $directory = 'public://my-image-folder';
    file_prepare_directory($directory, FILE_CREATE_DIRECTORY);

    //Saves a file to the specified destination and creates a database entry.
    $file = file_save_data($image, 'public://my-image-folder/'.$_FILES['image']['name'], FILE_EXISTS_RENAME);

    //Set the file status to permanent so it is not deleted in next cron run
    $file->status = FILE_STATUS_PERMANENT;
    file_save($file);

    //Now we have a saved file and an object for it, just need to add it to the node's image field.
    $node->field_my_image_field[$node->language][0] = (array)$file;

    node_save($node);
}

Answer 2

试试：

 $validators = array(
    'file_validate_extensions' => array('jpg png gif'),
  );
  //Save file
  if ($file = file_save_upload('icon', $validators, $your_file_destination)) {
    $file_content = file_get_contents($file->filepath);
  }
  else{
    form_set_error('icon', 'Could not upload file.');
  }