$post_author: WP_User Object
(
    [data] => stdClass Object
        (
            [ID] => 1
            [user_login] => admin
            [user_pass] => 1fb3c950d8d9b7e5181889556fa9cb92
            [user_nicename] => admin
            [user_email] => [email protected]
            [user_url] => 
            [user_registered] => 2011-11-28 14:01:39
            [user_activation_key] => 
            [user_status] => 0
            [display_name] => admin
            [type] => wpuser
        )

    [ID] => 1
    [caps] => Array
        (
            [administrator] => 1
            [wpcf_custom_post_type_view] => 1
            [wpcf_custom_post_type_edit] => 1
            [wpcf_custom_post_type_edit_others] => 1
            [wpcf_custom_taxonomy_view] => 1
            [wpcf_custom_taxonomy_edit] => 1
            [wpcf_custom_taxonomy_edit_others] => 1
            [wpcf_custom_field_view] => 1
            [wpcf_custom_field_edit] => 1
            [wpcf_custom_field_edit_others] => 1
            [wpcf_user_meta_field_view] => 1
            [wpcf_user_meta_field_edit] => 1
            [wpcf_user_meta_field_edit_others] => 1
            [manage_admins] => 1
            [do_lew_tasks] => 1
        )

    [cap_key] => wp_capabilities
    [roles] => Array
        (
            [0] => administrator
        )

    [allcaps] => Array
        (
            [switch_themes] => 1
            [edit_themes] => 1
            [activate_plugins] => 1
            [edit_plugins] => 1
            [edit_users] => 1
            [edit_files] => 1
            [manage_options] => 1
            [moderate_comments] => 1
            [manage_categories] => 1
            [manage_links] => 1
            [upload_files] => 1
            [import] => 1
            [unfiltered_html] => 1
            [edit_posts] => 1
            [edit_others_posts] => 1
            [edit_published_posts] => 1
            [publish_posts] => 1
            [edit_pages] => 1
            [read] => 1
            [level_10] => 1
            [level_9] => 1
            [level_8] => 1
            [level_7] => 1
            [level_6] => 1
            [level_5] => 1
            [level_4] => 1
            [level_3] => 1
            [level_2] => 1
            [level_1] => 1
            [level_0] => 1
            [edit_others_pages] => 1
            [edit_published_pages] => 1
            [publish_pages] => 1
            [delete_pages] => 1
            [delete_others_pages] => 1
            [delete_published_pages] => 1
            [delete_posts] => 1
            [delete_others_posts] => 1
            [delete_published_posts] => 1
            [delete_private_posts] => 1
            [edit_private_posts] => 1
            [read_private_posts] => 1
            [delete_private_pages] => 1
            [edit_private_pages] => 1
            [read_private_pages] => 1
            [delete_users] => 1
            [create_users] => 1
            [unfiltered_upload] => 1
            [edit_dashboard] => 1
            [update_plugins] => 1
            [delete_plugins] => 1
            [install_plugins] => 1
            [update_themes] => 1
            [install_themes] => 1
            [update_core] => 1
            [list_users] => 1
            [remove_users] => 1
            [promote_users] => 1
            [edit_theme_options] => 1
            [delete_themes] => 1
            [export] => 1
            [email_users_notify] => 1
            [email_single_user] => 1
            [email_multiple_users] => 1
            [email_user_groups] => 1
            [tablepress_edit_tables] => 1
            [tablepress_delete_tables] => 1
            [tablepress_list_tables] => 1
            [tablepress_add_tables] => 1
            [tablepress_copy_tables] => 1
            [tablepress_import_tables] => 1
            [tablepress_export_tables] => 1
            [tablepress_access_options_screen] => 1
            [tablepress_access_about_screen] => 1
            [tablepress_import_tables_wptr] => 1
            [tablepress_edit_options] => 1
            [wpcf_custom_post_type_view] => 1
            [wpcf_custom_post_type_edit] => 1
            [wpcf_custom_post_type_edit_others] => 1
            [wpcf_custom_taxonomy_view] => 1
            [wpcf_custom_taxonomy_edit] => 1
            [wpcf_custom_taxonomy_edit_others] => 1
            [wpcf_custom_field_view] => 1
            [wpcf_custom_field_edit] => 1
            [wpcf_custom_field_edit_others] => 1
            [wpcf_user_meta_field_view] => 1
            [wpcf_user_meta_field_edit] => 1
            [wpcf_user_meta_field_edit_others] => 1
            [vfb_read] => 1
            [vfb_create_forms] => 1
            [vfb_edit_forms] => 1
            [vfb_copy_forms] => 1
            [vfb_delete_forms] => 1
            [vfb_import_forms] => 1
            [vfb_export_forms] => 1
            [vfb_view_entries] => 1
            [vfb_edit_entries] => 1
            [vfb_delete_entries] => 1
            [vfb_edit_email_design] => 1
            [vfb_view_analytics] => 1
            [vfb_edit_settings] => 1
            [vfb_uninstall_plugin] => 1
            [config_postie] => 1
            [post_via_postie] => 1
            [cp_view_post_permalinks] => 1
            [cp_view_category_permalinks] => 1
            [do_lew_tasks] => 1
            [wpseo_manage_options] => 1
            [administrator] => 1
            [manage_admins] => 1
        )

    [filter] => 
    [site_id:WP_User:private] => 1
)

get_the_author_meta: 

$bio: 

$bios: Array
(
)