How can error reporting and display be configured in PHP to troubleshoot issues like headers already sent?

When headers are already sent in PHP, it typically means that output has been sent to the browser before headers are set, which can cause errors. To troubleshoot this issue, you can configure error reporting to display warnings and notices, which can help identify where the output is being sent before headers are set. Additionally, you can use output buffering to capture any output before headers are sent. 

<?php
// Enable error reporting to display warnings and notices
error_reporting(E_ALL);
ini_set('display_errors', 1);

// Start output buffering
ob_start();

// Your PHP code here

// Send headers after all output is captured
ob_end_flush();

Keywords

error reporting display_errors error_reporting headers already sent troubleshooting

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