I recently programmed a MiniCMS for a customer.
To make it easier for the customer to edit content, I looked for a opensource wysiwyg editor and I found spaw2.
Spaw2 has really everything you expect from a wysiwyg editor including fileupload.
It’s really easy to integrate.
Just include the library in you php file, start a new instant of the class and show the editor.

include("spaw2/spaw.inc.php");
$spaw = new SpawEditor("content", $content);

$spaw->show();


That’s it!