How can developers troubleshoot and resolve the issue of headers already being sent in PHP scripts?

When headers are sent before any output, such as HTML content or whitespace, it can cause an error in PHP scripts. To resolve this issue, developers can ensure that no content is output before sending headers using the `header()` function. They can also check for any whitespace or characters outside the PHP tags that might be causing the headers to be sent prematurely. 

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

// Check for any whitespace or characters outside PHP tags

// Send headers only after ensuring no output is sent
header('Content-Type: text/html');

ob_end_flush(); // Flush output buffer and send content
?>

Keywords

output buffering ob_start ob_end_flush header error_reporting

Related Questions