What are the differences in browser behavior when using simple refresh functions in PHP, especially between IE and Opera?

When using simple refresh functions in PHP, such as header("Refresh:0"), there may be differences in browser behavior, especially between Internet Explorer (IE) and Opera. IE may not properly handle the refresh and may display a blank page or not refresh at all, while Opera may interpret the refresh correctly. To ensure consistent behavior across browsers, it is recommended to use JavaScript for page refreshes instead of relying solely on PHP.

// Use JavaScript for page refresh instead of PHP header("Refresh:0")
echo '<script type="text/javascript">window.location.href = window.location.href;</script>';