How can PHP beginners ensure that no output is generated before using the header() function for URL redirection?

To ensure that no output is generated before using the header() function for URL redirection in PHP, beginners can use output buffering. Output buffering allows you to capture all output before it is sent to the browser, giving you the ability to modify headers at any point in your script. 

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

// Your PHP code here

if ($condition) {
    header("Location: new_page.php");
    exit();
}

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

Keywords

PHP header function URL redirection output buffering ob_start

Related Questions