How can the issue of headers and output order be managed effectively in PHP scripts to prevent errors like "Cannot modify header information"?

Issue: To prevent errors like "Cannot modify header information," manage the issue of headers and output order effectively in PHP scripts by ensuring that no output is sent before calling the header() function. This can be achieved by placing the header() function at the beginning of the script before any HTML or whitespace. 

<?php
ob_start(); // Start output buffering
// Place header() function at the beginning of the script
header("Content-Type: text/html");

// Your PHP code here

ob_end_flush(); // Flush the output buffer
?>

Keywords

PHP headers output buffering ob_start ob_end_flush

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