SilverStripe UploadField文件自动重命名

Question

我在前端做了一个窗体来上传一些图像。我的想法是自动重命名上传到唯一ID的所有文件。

我曾看过SilverStripe API，但没有看到任何相关内容。 UploadField API

这可能吗？

Answer 1

这是我的解决方案波纹管，在Silverstripe 3.X中，我们必须用另一个类来扩展UploadField。然后将“saveTemporaryFile”功能复制到其中。

就在'尝试 ''，只需要添加：

$ext = array_reverse(explode('.',$tmpFile['name'])); // explode filename into array, reverse array, first array key will then be file extension 
$tmpFile['name'] = hash_hmac('sha256', $tmpFile['name'], '12345') . '.' . $ext[0]; 

---

结果：

class RandomNameUploadField extends UploadField { 


protected function saveTemporaryFile($tmpFile, &$error = null) { 

    // Determine container object 
    $error = null; 
    $fileObject = null; 

    if (empty($tmpFile)) { 
     $error = _t('UploadField.FIELDNOTSET', 'File information not found'); 
     return null; 
    } 

    if($tmpFile['error']) { 
     $error = $tmpFile['error']; 
     return null; 
    } 

    // Search for relations that can hold the uploaded files, but don't fallback 
    // to default if there is no automatic relation 
    if ($relationClass = $this->getRelationAutosetClass(null)) { 
     // Create new object explicitly. Otherwise rely on Upload::load to choose the class. 
     $fileObject = Object::create($relationClass); 
    } 

    $ext = array_reverse(explode('.',$tmpFile['name'])); // explode filename into array, reverse array, first array key will then be file extension 
    $tmpFile['name'] = hash_hmac('sha256', $tmpFile['name'], '12345') . '.' . $ext[0]; 

    // Get the uploaded file into a new file object. 
    try { 
     $this->upload->loadIntoFile($tmpFile, $fileObject, $this->getFolderName()); 
    } catch (Exception $e) { 
     // we shouldn't get an error here, but just in case 
     $error = $e->getMessage(); 
     return null; 
    } 

    // Check if upload field has an error 
    if ($this->upload->isError()) { 
     $error = implode(' ' . PHP_EOL, $this->upload->getErrors()); 
     return null; 
    } 

    // return file 
    return $this->upload->getFile(); 
} 



} 

感谢@3dgoo给我的解决方案的一部分！

Answer 2

我现在没有关于一个API，但有一些代码我能够做到这一点。

你有两种可能性。

首先使用数据库。

第二只使用代码：

$directory = '/teste/www/fotos/'; 
$files = glob($directory . '*.jpg'); 

if ($files !== false) 
{ 
    $filecount = count($files); 
    $newid = $filecount+1; 
    $new_name = "foto_".$newid; 
    $target_file = $directory."/".$new_name; 
    move_uploaded_file($_FILES["fileToUpload"]["tmp_name"], $target_file); 

} 
else 
{ 
    $new_name = "foto_1"; 
    $target_file = $directory."/".$new_name; 
    move_uploaded_file($_FILES["fileToUpload"]["tmp_name"], $target_file); 
} 

我的例子是JPEG，但你可以看一下大厅的类型。