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Unexpected 'how to modify header information' scenarios when Setting Cookies in PHP 8.2

👀 Views: 100 đŸ’Ŧ Answers: 1 📅 Created: 2025-06-16
php slim cookies PHP

I'm confused about I'm getting frustrated with I'm working with a 'want to modify header information - headers already sent' behavior when trying to set cookies in my PHP 8.2 application using the Slim framework... The behavior occurs when I attempt to set a cookie in my route handler, but it seems to be related to whitespace in either my PHP file or the output buffer. Here is the relevant code snippet: ```php $app->get('/set-cookie', function ($request, $response, $args) { setcookie('user', 'JohnDoe', time() + 3600, '/'); return $response->withStatus(200)->write('Cookie has been set!'); }); ``` I have double-checked the files for any stray whitespace before the opening `<?php` tag and after the closing `?>` tag, but I couldn't find anything. Additionally, I've tried enabling output buffering at the start of my script using `ob_start()` but still face the scenario. Here is how I'm starting my script: ```php <?php ob_start(); require 'vendor/autoload.php'; // Your other code... ``` I also confirmed that there is no output being sent to the browser before `setcookie()` is called. However, I still receive the behavior. Is there a specific configuration or best practice for managing cookies in this context that I'm missing? Any insights into this would be greatly appreciated! I'm on Windows 10 using the latest version of Php. Any help would be greatly appreciated! Could this be a known issue? Could this be a known issue?