What are the best practices to avoid the "Cannot modify header information" error in PHP?

The "Cannot modify header information" error in PHP occurs when there is output sent to the browser before header functions are called. To avoid this error, make sure to not output anything before using header functions like header() or setcookie(). One common solution is to move all header-related functions to the top of the PHP script. 

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

// Your PHP code here

header('Location: new_page.php'); // Redirect example

ob_end_flush(); // Flush the output buffer
?>

Keywords

header output buffering ob_start ob_end_flush ob_clean

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