It is possible, but your Perl code will need access to the Wordpress database to look up the session. As another monk mentioned, you cannot depend on the cookie alone and must look up the user's session in the database. Cookies can be faked and trusting a username from a cookie is asking for malicious visitors to abuse your site.

In reply to Re: Grab username from WP Cookie by jcb
in thread Grab username from WP Cookie by htmanning

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