What impact does the order of PHP code and HTML output have on session management in PHP scripts?

The order of PHP code and HTML output can impact session management in PHP scripts because session_start() must be called before any output is sent to the browser. This is because session data is stored in cookies or passed through HTTP headers, which must be sent before any HTML content. To ensure proper session management, always call session_start() at the beginning of your PHP script before any HTML output. 

<?php
session_start();

// Your PHP code here

?>

<!DOCTYPE html>
<html>
<head>
    <title>Session Management</title>
</head>
<body>
    <!-- Your HTML content here -->
</body>
</html>

Keywords

PHP code HTML output session management script execution order session variables

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