What are some best practices for handling HTML headers in PHP scripts, particularly when dealing with multiple processes and potential errors in a live environment?

When handling HTML headers in PHP scripts, it is important to ensure that headers are set before any output is sent to the browser. This can prevent errors such as "headers already sent" which can occur when trying to modify headers after content has already been sent. To handle multiple processes and potential errors in a live environment, it is recommended to use output buffering to capture all output before sending any headers. 

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

// Your PHP code here

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

ob_end_flush(); // Flush the output buffer
?>

Keywords

HTTP headers PHP scripts error handling live environment multiple processes

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