How can one handle access denial errors in PHP when encountering reserved characters in URLs?

When encountering access denial errors in PHP due to reserved characters in URLs, one can handle this by encoding the URL using the `urlencode()` function. This function encodes special characters in the URL so that they can be safely passed as parameters without causing access denial errors.

$url = "https://example.com/page?param=" . urlencode("special character");
header("Location: $url");
exit();