How do you loop check a text in php - php

Question

i am making a code where the system checks if you are an 'Admin' or a 'SuperAdmin'.
i cant seem to make it loop everything to check if 'SuperAdmin' is in the 'user_type'
$sql = "SELECT * from users";
$result = mysqli_query($con,$sql);
while ($row2 = mysqli_fetch_array($result)) {
if ($row2['user_type'] != "SuperAdmin") {
echo "<script>window.alert('You do not have administrative
priviledges for this page!');
location.href='../admin_page.php';</script>";
} else {
}
}

Answer 1

window.alert("You do not have administrative priviledges for this page!"); location.href="../admin_page.php";';
} else {
}
?>

Answer 2

I believe you want to check if the current use is an "Admin" or a "SuperAdmin". In that case, you need to get the row for the current user using the UserID that you get after authenticating the user. Change your query and php code to something like:
$UserId = 111; //This is the user id from database you get on authenticating the user: e.g. 111.
$sql = "SELECT * from users WHERE UserId = ". $UserId;
$result = mysqli_query($con,$sql); //This should retrieve a single row, with details for the specific user.
while ($row2 = mysqli_fetch_array($result)) {
if !(($row2['user_type'] == "SuperAdmin")||($row2['user_type'] == "Admin")){
echo "<script>window.alert('You do not have administrative
priviledges for this page!');
location.href='../admin_page.php';</script>";
} else {
//Code to be executed if the user is an admin or a super admin
}
}