Are there any best practices or guidelines for handling headers in PHP to avoid errors?

When working with headers in PHP, it is important to ensure that headers are set before any output is sent to the browser. This can be achieved by using the ob_start() function to buffer output until headers are set. Additionally, it is good practice to check if headers have already been sent before attempting to set new headers to avoid errors. 

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

// Check if headers have already been sent
if (!headers_sent()) {
    // Set headers
    header('Content-Type: text/html');
}

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

// Flush output buffer
ob_end_flush();

Keywords

HTTP headers PHP error handling header() header manipulation

Related Questions