How can the issue of headers already sent be resolved in PHP scripts?

The issue of "headers already sent" in PHP scripts can be resolved by ensuring that no output is sent to the browser before calling functions like `header()` or `setcookie()`. This error occurs when there is whitespace or any other output before these functions are called, which prevents the headers from being sent properly. 

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

// Your PHP code here

ob_end_flush(); // Send output and disable buffering

Keywords

output buffering ob_start ob_end_flush header ob_clean

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