Question

I’m building a WebApp that needs to send a text and a filename through AJAX to the PHP script(on the same place as the Javascript source of course) and the PHP script should save this file on the server, but how to make this?

Answer 1

That sounds very simple actually. You just send your AJAX request:

$.post("file.php", {filename:"text1.txt", text:"..."});

And in PHP only need:

file_put_contents($dir.basename($_POST["filename"]), $_POST["text"]);

Obviously you need a bit more authorization, a pre-defined save $dir and using basename() is only the minimum security precaution.