登录后无法通过Router重定向至主页面问题求助

Why Your Redirect Isn't Working #

Got it, let's break down why your current setup isn't working and fix it right away:

1. Your header() call is missing the required Location: prefix — the server won't recognize it as a redirect instruction without this.
2. The relative path /../../../public/index.php doesn't align with your URL structure. Chances are your web server uses the public folder as the document root, so public/ doesn't show up in the actual browser URL. That path would try to point to a non-existent location outside your subdomain's root.

Fixes to Get You Redirected #

Here are two straightforward, reliable solutions:

1. Root-Relative Path (Simplest Option) #

Since your target is the root of sub.mydomain.de, just redirect directly to / — this will automatically map to your public/index.php file (assuming your server is configured correctly):

// After your login validation passes
if ($login_success) {
    // Enable output buffering if you're worried about accidental prior output
    ob_start();
    header("Location: /");
    exit(); // Always exit after redirect to stop further script execution
}

2. Absolute URL (Most Reliable Option) #

If you want to eliminate any path ambiguity, use the full absolute URL of your main page:

if ($login_success) {
    ob_start();
    header("Location: https://sub.mydomain.de/");
    exit();
}

Key Reminders #

• No Output Before header(): Even a single space, newline, or HTML tag before your <?php tag will break the redirect. If you can't avoid accidental output, add ob_start(); at the very top of login.php to enable output buffering.
• Exit After Redirect: Always call exit() or die() right after the header() call. This stops the rest of your script from running, preventing unexpected behavior or partial page renders.

内容的提问来源于stack exchange，提问作者F.Ghost