PHP - Good practice to apply multi-level PHP User Authorization
<p>Given a website site has different web pages that can only be accessed by different group of users. Say guest users can only access welcome page/search page, while, administrator users can access pages that update the DB, etc.</p>

<p>I have little experience on this field and would like to adopt some best practice with clean/simple/secure implementation.</p>

<p>If possible, I would like to see some concrete examples/tutorials, even a book resource.</p>

<p>Thank you for your helps</p>
