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

The issue of headers already being sent in PHP code can be resolved by ensuring that no output is sent to the browser before calling functions like header(). This can be achieved by moving any output such as HTML content or whitespace before the header() function calls in the code. 

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

// Your PHP code here

ob_end_flush(); // Send output buffer to the browser

Keywords

output buffering ob_start ob_end_flush headers_sent header

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