php pages restrictions, how to make it work -


below admin pannel code 

<?php      session_start();      if (!isset($_session['username'])) {       header("location: login.php"); }      if (isset($_session['username'])&& $_session['status']) {      include('adminnav.php'); }  ?>

and usernav bar

<?php session_start(); if (!isset($_session['username'])&& $_session['status']) { header("location: login.php"); }  if (isset($_session['username'])&& $_session['status']) {     $_session['status']; header("location: usernav.php"); }   ?>

i have same interface admin , user login , when log in system user profile user can assess admin pages e.g. remove user etc, wanna know how restrict user page , admin user can access admin page.


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