What role does whitespace play in causing header modification errors in PHP scripts?

Whitespace can cause header modification errors in PHP scripts because any output, including whitespace, sent before the `header()` function call will prevent the headers from being modified. To solve this issue, make sure there is no whitespace, HTML tags, or any other output before the `header()` function calls in your PHP scripts. 

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

// Your PHP code here

ob_end_clean(); // Clean the output buffer without sending any output

// Now you can safely use header() function calls without any whitespace interference
header("Location: newpage.php");
exit;
?>

Keywords

whitespace header modification errors PHP scripts role

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