Wordpress funtions to set and get a users last login activity (put in functions.php)

wp-login-activity-functions.php

	//associating a function to login hook
	add_action('wp_login', 'set_last_login');
	 
	//function for setting the last login
	function set_last_login($login) {
	   $user = get_userdata($login);
	 
	   //add or update the last login value for logged in user
	   update_user_meta( $user->ID, 'last_login', current_time('mysql') );
	}

	//function for getting the last login
	function get_last_login($user_id) {
	   $last_login = get_user_meta($user_id, 'last_login', true);
	 
	   //picking up wordpress date time format
	   $date_format = get_option('date_format') . ' ' . get_option('time_format');
	 
	   //converting the login time to wordpress format
	   $the_last_login = mysql2date($date_format, $last_login, false);
	 
	   //finally return the value
	   return $the_last_login;
	}