How can headers already sent error be resolved when using the header() function in PHP scripts?

The "headers already sent" error in PHP occurs when output is sent to the browser before calling the header() function. To resolve this issue, make sure there is no whitespace or any other output before the header() function is called. One common solution is to move the header() function calls to the very beginning of the script before any output is sent. 

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

// Your PHP code here

header('Location: https://www.example.com'); // Example header() function call

ob_end_flush(); // Flush output buffer

Keywords

headers header function output buffering ob_start ob_end_flush

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