Which PHP authorization script to choose?

Question

PHP

Hello, please advise a ready-made authorization solution in PHP, which can be attached to a self-written code. The main criteria are safety and simplicity.

Answer 1

Loginza, uLogin - for authorization through third-party services. I somehow liked working with uLogin better.
And if you really want a full-fledged user system for a self-written project, then really, write your own)

Answer 2

make a self-written script to the self-written code :) At the same time, you will understand how it works. Learning to paint our bikes before riding someone else's :)

Answer 3

At one time I also wrote a bicycle for authorization. To be sure, I looked here .

Answer 4

And most problematic to write to your code?