How to upload file in Symfony?

@lindsey.homenick 

To upload a file in Symfony, you will need to follow these steps:

1. Create an HTML form that allows the user to select a file to upload. The form should have a method of "POST" and an enctype of "multipart/form-data":

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<form method="POST" enctype="multipart/form-data">
  <input type="file" name="file">
  <button type="submit">Upload</button>
</form>

1. In your Symfony controller, you will need to handle the request made by the form submission. You can do this by creating a route and a corresponding controller action:

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/**
 * @Route("/upload", name="upload")
 */
public function upload(Request $request)
{
  // handle the file upload
}

1. In the controller action, you can retrieve the uploaded file from the request using the get('file') method:

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$file = $request->files->get('file');

1. You can then use the move() method of the File object to move the uploaded file to a desired location:

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$file->move($destination, $newFilename);

This will move the uploaded file to the specified destination with the new file name.

1. Finally, you can persist the uploaded file's information (such as the file name, MIME type, etc.) to the database if needed.

I hope this helps! Let me know if you have any questions.