How can beginners prevent header modification errors in PHP when developing a website or application?

Header modification errors in PHP can occur when attempting to modify headers after they have already been sent to the browser. To prevent this issue, beginners should ensure that no output, including whitespace, is sent before calling the header() function. One way to solve this problem is to use output buffering to capture all output before sending any headers. 

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

// Your PHP code here

ob_end_flush(); // Flush the output buffer and send headers
?>

Keywords

header modification PHP website development application development error prevention

Related Questions