How can PHP headers be effectively utilized to control the flow of the script and avoid errors related to header information modification?

When working with PHP, it's crucial to use headers effectively to control the flow of the script and avoid errors related to header information modification. To prevent errors like "headers already sent" or "header information modification," make sure to set headers before any output is sent to the browser. This can be achieved by placing the header functions at the beginning of the script before any HTML or whitespace. 

<?php
// Set headers before any output
header("Content-Type: text/html");

// Your PHP code here
echo "Hello, World!";
?>

Keywords

PHP headers script flow control header information modification error prevention PHP functions

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