How can one ensure that PHP code is properly structured to prevent issues with session variables and headers?

To ensure that PHP code is properly structured to prevent issues with session variables and headers, it is important to always start the session before any output is sent to the browser. This can be achieved by calling session_start() at the beginning of the PHP script, before any HTML or whitespace. Additionally, make sure to avoid sending any headers (like setcookie or header) after output has already been sent. 

<?php
session_start();

// Your PHP code here
?>

Keywords

PHP session variables headers structure errors

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