How to get the value of that input text?

Question

I have two roles "admin" and "student", if the role = "student" I want to hide the admin menu

Html

<input id="role" value='<?php echo $_SESSION[$config["session"]]["role"];?>'>

Javascript

function loadPage(){
   if($("#role").val() == "student"){
       $("#admin-menu").hide()
   }
}

Answer 1

Call your function after document load.

$(document).ready(function() {
loadPage();
});

Answer 2

You could add this to your menu container class

<?= ($_SESSION[$config["session"]]["role"]?= admin: 'hidden'? '') ?>

It would add class 'hidden' if the user's role is not admin

But the better practice is to use separate views for different user roles or|and do not render admin menu at all