How to use FLASH to upload and save files on the server to a local device

How can I use FLASH to download and save files on the server to a local device? The process may be like this: provide a file path on the server, click the FLASH file, and the save file box will pop up. click save to save the file to a local place, just like uploading a file with FLASH, after clicking FLASH, select a local file and upload it to the server. how can I use flash to download and save the files on the server to the local device?
I think the process may be like this.

Provides a file path for the server.
Click the FLASH file, and the save file box is displayed. click save to save the file locally.


Just like using FLASH to upload files, click FLASH and select a local file, and then upload it to the server.

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Flash alone is definitely not good. You need to communicate with php and get the file from php and then pass it to flash.
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Of course you can, and the proposed process is correct.
But it has nothing to do with php. you have to ask flash experts.

Just like a browser downloading a file, a download dialog box is displayed when the browser encounters a file type that cannot be parsed by itself. This file is provided by php or jsp.
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In addition, if the file is obtained by PHP and then transmitted to flash, will it consume much memory for large files?
-- You have no choice but to run flash on the client. To operate server files, you must use php (of course, you can use other server language versions ).

For example, you can search for the example of php + flash.