How can the issue of "headers already sent" be resolved in PHP when working with sessions?

Issue: The "headers already sent" error in PHP occurs when there is output sent to the browser before headers are set, which can interfere with session initialization. To resolve this issue, make sure there is no whitespace or any other output before session_start() is called in your PHP script. 

<?php
ob_start(); // Start output buffering
session_start(); // Start the session
// Rest of your PHP code goes here
?>

Keywords

output buffering ob_start session_start session_write_close header

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