Add Website and Nickname Fields to the Paid Memberships Pro Members List CSV Export

my_pmpro_members_list_csv_extra_columns.php

/*
Plugin Name: PMPro Extra Members List CSV Export Columns
Plugin URI: http://www.paidmembershipspro.com/wp/pmpro-extra-members-list-csv-export-columns/
Description: Add extra fields to the Paid Memberships Pro Members List CSV Export
Version: .1
Author: Stranger Studios
Author URI: http://www.strangerstudios.com

Notes on use:

Add extra fields to the members list CSV export.
	
Requires PMPro version 1.5.1 or later.
	
The filter should return an array ($columns).
Array keys are the column headings (string).
Array values are callback functions to use (string).
	
The callback function should accept one parameter (an object containing user data and meta values) and return a value to output to the CSV.
*/
function my_pmpro_members_list_csv_extra_columns($columns)
{
	$columns["website"] = "my_extra_column_website";
	$columns["nickname"] = "my_extra_column_nickname";
	
	return $columns;
}
add_filter("pmpro_members_list_csv_extra_columns", "my_pmpro_members_list_csv_extra_columns", 10, 2);

function my_extra_column_website($user)
{
	return $user->user_url;
}
function my_extra_column_nickname($user)
{
	return $user->metavalues->nickname;
}