How can PHP developers ensure that the display of Google referrers with special characters is accurate and consistent across different browsers?

Special characters in Google referrers can sometimes cause display issues in PHP, especially across different browsers. To ensure accurate and consistent display, PHP developers can use the `urldecode()` function to decode the special characters in the referrer URL before displaying it on the webpage.

$referrer = urldecode($_SERVER['HTTP_REFERER']);
echo $referrer;