What is the potential issue with trying to send a header after already outputting content in PHP?

Attempting to send a header after already outputting content in PHP will result in a "Headers already sent" error. To solve this issue, make sure to send headers before any content is output to the browser. This can be achieved by moving header functions to the beginning of the script or using output buffering to store the output before sending it to the browser. 

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

// Your PHP code here

header('Location: https://www.example.com'); // Send header

ob_end_flush(); // Flush the output buffer

Keywords

header output content buffer error

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