What potential errors can occur when using the header() function in PHP?

When using the header() function in PHP, potential errors can occur if there is output sent to the browser before the header function is called. This can result in a "headers already sent" error. To solve this issue, ensure that there is no output (such as HTML, whitespace, or error messages) before calling the header() function. 

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

// Your PHP code here

header("Location: https://www.example.com");
exit();

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

Keywords

header function PHP error handling HTTP headers redirection

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