Topic: what is get_hook function?
I see following line next to each field in registration file (register.php).
<?php ($hook = get_hook('rg_register_pre_username')) ? eval($hook) : null; ?>can someone tell what does get_hook function do? and what is 'rg_register_pre_username'. I understand that is for the username field, but I could not find rg_register_pre_username used anywhere else on the page. Can I randomly use any name there if I want to add an extra field?
