如何修复Redirect Loop错误？

I am trying to make a user login site, I have a header.php and a home.php documents. I have the following code on the header.php page:

<?php 
include ("./inc/connect.inc.php"); 
session_start();
if (isset($_SESSION['user_login'])) {
}
else 
{
header("location: home.php");

}
?>

on the home.php page i have:

<?php
include("inc/header.inc.php");
?>
<?
if (!isset($_SESSION["user_login"])

?>

No matter what i try I am getting this loop error, please help :(

Always use exit(); after header("location: .."); or it might not work as expected.

About Loop Error its possible both header.php and home.php are redirecting to each other.

I am not sure if its the same file (correct me if am wrong)

In header.php you are redirecting user to home.php if session is not set AND in home.php you are including a file header.inc.php(i am assuming its the same file) which is redirecting user to home.php again and again

There is nothing that sets $_SESSION['user_login'] in those two files, you need to set this parameter in header.php otherwise it will keep falling into this condition:

else 
{
header("location: home.php");
}

The loop is as follows:

  1. User comes to home.php
  2. header.php is included
  3. header.php checks to see if $_SESSION['user_login'] has been set
  4. It hasn't so the header location is set to home.php
  5. Go to step 1

I'm not entirely sure what you want to achieve here, but I'm going to assuming you want to display a page, but if the user isn't logged in to display something else?

Why not:

if (isset($_SESSION['user_login']) {
    include('logged_in.php');
} else {
    include('login_page.php');
}

Rather than bounce the user around, just display a different file?