👀 Views: 0 💬 Answers: 1 📅 Created: 2025-06-28

php symfony headers PHP

This might be a silly question, but I'm trying to implement I'm working with a 'want to modify header information - headers already sent' behavior in my Symfony 5.4 application running on PHP 8.1. This behavior occurs when I attempt to set a cookie before rendering my response. I've verified that there are no whitespace characters before the opening `<?php` tag in my files. However, I still get the behavior when executing the following code snippet: ```php public function someAction(Request $request, Response $response) { // Trying to set a cookie $response->headers->setCookie(new Cookie('my_cookie', 'cookie_value')); // Render a template return $this->render('my_template.html.twig'); } ``` I also checked that there are no echo statements or print_r that might accidentally send output to the browser before my headers are set. I've tried moving the cookie setting code above the return statement and even utilizing the `Kernel::terminate()` method to set cookies after the response is sent, but the scenario continues. To further diagnose, I added output buffering at the start of the script using `ob_start();`, but it didn't resolve the scenario either. Is there a better way to manage headers and cookies in Symfony under these conditions? Any insights would be greatly appreciated! I'm on Ubuntu 20.04 using the latest version of Php. I'm working on a application that needs to handle this. Hoping someone can shed some light on this.