How can the "headers already sent" warning be avoided when setting the content type to UTF-8 in PHP?

When setting the content type to UTF-8 in PHP, the "headers already sent" warning can be avoided by ensuring that no output is sent to the browser before setting the header. This warning occurs when PHP tries to send HTTP headers after content has already been sent to the browser. To avoid this issue, you can use output buffering to capture any output before sending headers. 

<?php
ob_start();
header('Content-Type: text/html; charset=utf-8');
ob_end_flush();
?>

Keywords

UTF-8 headers output buffering ob_start ob_end_clean

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