What are the potential consequences of not following the correct order of operations in PHP when dealing with header functions?

If the correct order of operations is not followed when dealing with header functions in PHP, it can lead to errors such as "Headers already sent" or unexpected behavior in the output. To avoid this issue, make sure to call header functions before any output is sent to the browser. 

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

// Call header functions before any output
header("Content-Type: text/html");
header("Location: https://www.example.com");

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

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