pnotes question from newbie

[soup_or_power]

Wondering what is $req_session = {} doing in the following
code. Thanks!

Apache->request()->pnotes(__eReqCache => $req_session = {}) unless
$req_session;

 

[Dave Weaver]

Wondering what is $req_session = {} doing in the following
code. Thanks!

Apache->request()->pnotes(__eReqCache => $req_session = {}) unless
$req_session;

It is assigning a reference to an empty hash to the variable
$req_session.