Woffice_Members_Map.php

<?php
/**
 * Load the BuddyPress members coordinates
 *
 * This is an Ajax callback, we just output the locations as a formatted JSON array
 *
 * @return void
 */
public function loadMembers() {
	$is_request_safe = (
		wp_verify_nonce($_POST['_nonce'], 'woffice_map_members')
		&&
		is_admin()
		&&
		defined('DOING_AJAX')
		&&
		DOING_AJAX
	);

	if ($is_request_safe === false) {
		wp_die();
	}

	// Get our saved data
	$saved_locations = get_option('woffice_map_locations');

	if (empty($saved_locations) || $saved_locations == '[]') {
		$saved_locations = '[{"name":"No Data","lat":0,"long":0,"user_id":1}]';
	}

	$locations = (array) json_decode($saved_locations, true);

	// Add any extra information here
	foreach($locations as $key=>$location) {
		$locations[$key]['avatar'] = get_avatar($location['user_id']);
	}

	/**
	 * Filter `woffice_members_map_locations`
	 *
	 * Gives the ability to customize the Members locations array before it's being returned
	 *
	 * @return array
	 */
	$locations = apply_filters('woffice_members_map_locations', $locations);

	// Return the value & end
	echo json_encode($locations);
	wp_die();
}