I suggest to add the following copyright header to all PHP files (I am happy to take care of that if confirmed and create a PR).
/*
* Password-Manager
* An online keepass-like tool with client-side AES encryption.
* https://github.com/zeruniverse/Password-Manager
*
* Copyright by Jeffery Zhao and Benjamin Häublein.
* Licensed under The MIT License (MIT), see file LICENSE.
*/
I suggest to add the following copyright header to all PHP files (I am happy to take care of that if confirmed and create a PR).