What are the potential consequences of ignoring the "headers already sent" error in PHP?

When PHP outputs content to the browser, it sends headers to the browser before sending any other content. If there is any output sent to the browser before setting headers, PHP will throw a "headers already sent" error. This can cause issues with redirecting, setting cookies, or sending other header information. To solve this issue, make sure to not output any content before setting headers, and check for any whitespace or characters outside of the PHP tags. 

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

// Your PHP code here

ob_end_flush(); // Flush the output buffer

Keywords

output buffering ob_start header function PHP error reporting white space characters

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