One-Page Checkout [Support Thread]

[ikirin]

I need to get the gender of the guest account. I checked the source code and found that I can get the user's birthday address like

$dob_value = $_SESSION['opc']->getGuestDateOfBirth(); 

, but for the gender of the guest, I don't get it.
I can't use this in another php file

$gender = $this->guestCustomerInfo['gender']; 

To get effective help, can anyone provide some tips?