In some cases, an application need only check if a user is already
logged in to a trusted OpenID server without any interaction with the
user. The Zend_OpenId_Consumer::check method does precisely
that. It is executed with the same arguments as
Zend_OpenId_Consumer::login, but it doesn't display any
OpenID server pages to the user. From the users point of view this process is
transparent, and it appears as though they never left the site. The third step
succeeds if the user is already logged in and trusted by the site, otherwise
it will fail.
Example 627. Immediate Check without Interaction
<?php
$consumer = new Zend_OpenId_Consumer();
if (!$consumer->check($_POST['openid_identifier'], 'example-4_3.php')) {
die("OpenID login failed.");
}
This example implements only the second step of authentication; the first and third steps are similar to the examples above.