What are the advantages and disadvantages of using output buffering in PHP for handling headers, cookies, and session data in web applications?

When working with headers, cookies, and session data in PHP web applications, using output buffering can simplify the process by allowing you to set headers, manipulate cookies, and work with session data before any content is sent to the browser. However, output buffering can also introduce complexity and potential performance issues if not managed properly. 

<?php
// Start output buffering
ob_start();

// Set headers
header('Content-Type: text/html');

// Set cookies
setcookie('user', 'John Doe', time() + 3600);

// Start session
session_start();

// Output content
echo 'Hello, world!';

// Flush output buffer
ob_end_flush();
?>

Keywords

output buffering PHP headers cookies session data web applications

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