Check for session cookie, and show missing-cookie page if it is missing.
public static checkSessionCookie ( string | null $retryURL = null ) : void | ||
$retryURL | string | null | The URL the user should access to retry the operation. Defaults to null. |
return | void | If there is a session cookie, nothing will be returned. Otherwise, the user will be redirected to a page telling about the missing cookie. |