In what situations should header() function be used in PHP, and how can conflicts with output be avoided?

The header() function in PHP should be used to send raw HTTP headers to the client. It is commonly used for tasks such as redirecting a user to a different page, setting cookies, or specifying the content type of the response. To avoid conflicts with output, the header() function must be called before any actual output is sent to the browser, including HTML tags, whitespace, or any other content. 

<?php
// Call header() before any output is sent
header('Location: https://www.example.com');
exit;
?>

Keywords

header function PHP output conflicts HTTP headers redirect

Related Questions