php too many redirects - php

Question

so I'm trying to restrict the access of users
example: member tries to visit admin page by typing "test.com/admin.php" in the url bar
also if someone is not logged in or an admin tries to access a member page
but I'm getting an error message which tells me too many redirects
hope somebody can help me, thanks in advance
this is the login.inc.php script which basically logs me in:
<?php
require 'dbh.inc.php';
$mailUid = $_POST['mailuid'];
$password = $_POST['pwd'];
if(empty($mailUid || empty($password))){
header("Location: ..index.php?error=emptyfields");
exit();
}
else{
$sql = "SELECT * FROM users WHERE uidUsers=? OR emailUsers=?;";
$stmt = mysqli_stmt_init($conn);
if(!mysqli_stmt_prepare($stmt, $sql)){
header("Location: ../index.php?error=sqlerror");
exit();
}
else{
mysqli_stmt_bind_param($stmt, "ss", $mailUid, $mailUid);
mysqli_stmt_execute($stmt);
$results = mysqli_stmt_get_result($stmt);
if($row = mysqli_fetch_assoc($results)){
$pwdCheck = password_verify($password, $row['pwdUsers']);
if($pwdCheck == false){
header("Location: ../index.php?error=wrongpassword");
exit();
}
else if($pwdCheck == true){
session_start();
$_SESSION['userId'] = $row['idUsers'];
$_SESSION['userUid'] = $row['uidUsers'];
$_SESSION['userRole'] = $row['roleUsers'];
if($_SESSION['userRole'] == "admin"){
header("Location: ../admin.php");
exit();
}
if($_SESSION['userRole'] == "member"){
header("Location: ../member.php");
exit();
}
}
else{
header("Location: ../index.php?error=wrongpassword");
exit();
}
}
else{
header("Location: ../index.php?error=nousers");
exit();
}
}
}
This is the validate.inc.php script which redirects people based on roles
<?php
$role = $_SESSION['userRole'];
if($role=="admin"){header("Location: ./admin.php");}
elseif($role=="member"){header("location: ./member.php");}