What best practice should be followed to prevent "headers already sent" error in PHP scripts?

When encountering the "headers already sent" error in PHP scripts, it is important to ensure that no output is sent to the browser before calling functions like header(). To prevent this error, make sure that there is no whitespace or HTML content before the opening <?php tag in your PHP files. 

&lt;?php
ob_start(); // Start output buffering
// Your PHP code here
ob_end_flush(); // Flush the output buffer

Keywords

output buffering ob_start header error_reporting whitespace

Related Questions