How to store multiple pdf file into public folder using laravel 8 in controller?

To store files in your public folder you can use the public disk that's included in your application's filesystems configuration file, the default config will store files in storage/app/public.

To make these files accessible from the web though (which I'm assuming is what you want) you need to create a symbolic link from public/storage to storage/app/public.

To do that just run:

php artisan storage:link

Once you've done this you can use Laravel's storage facade to interact with the files in your public folder to save, retrieve and download them.

Store

use Illuminate\Support\Facades\Storage;
 
Storage::put('file.jpg', $contents);

Download

return Storage::download('file.jpg');
 
return Storage::download('file.jpg', $name, $headers);

Retrieve

$contents = Storage::get('file.jpg');

If you need to store user uploaded files to your public storage, you can do it like this:

  $path = $request->file('yourUploadedPdf')->store('yourPdfsFolder');

Laravel's store method will generate a unique ID for the filename and the extension will be determined by the MIME type of the uploaded file. The store method also returns the path, including the generated filename, so you can store it in your DB if needed.

If you need to specify the filename then you can do this:

$path = $request->file('pdf')->storeAs(
    'yourPdfsFolder', 'yourPdfFileName'
);

Just a note, I'm assuming you'll be having public as your default disk, if not, then you'll need to specify the disk you're using in these method / Storage facade calls.

And a further note, when using the public disk, everything - by default - gets stored under storage/app/public so anytime you're defining a folder to store your uploaded PDFs under, it'll be storage/app/public/yourFolder.