How can output be managed before sending headers in PHP to avoid errors?

When output is sent before headers in PHP, it can result in errors such as "Headers already sent" because headers must be sent before any output is sent to the browser. To avoid this issue, you can use output buffering to capture any output before headers are sent. This way, you can manipulate the output as needed before sending it to the browser. 

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

// Your PHP code here

ob_end_flush(); // Send output to the browser

Keywords

buffering ob_start ob_get_clean headers_sent output management

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