How can the issue of headers already sent be resolved in PHP scripts for cross-browser compatibility?

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(). To solve this issue for cross-browser compatibility, you can use output buffering to capture all output before sending it to the browser. This way, headers can be set at any point in the script without causing errors.

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

// Your PHP code here

ob_end_flush(); // Send output to the browser