WordPress: Add login/logout links to WordPress functions.php

login-links.php

// Add login/logout links to the footer navigation
// Put this in functins.php
// This will filter through the menu items and look for the footer-menu.
// Then append login/logout links to the end

function add_loginout_menu_to_footer( $items, $args ) { 
  if ( is_admin() || $args->theme_location != 'footer-menu' ) // only add login/out items to the footer menu
		return $items;
	
	$link = wp_loginout( $redirect = home_url(), $echo = false ); // use wp_loginout() to return the correct login OR logout link strings

	// append our new list item to the current menu list items and return it
	return $items .= '<li id="log-in-out-link" class="menu-item menu-type-link">'. $link . '</li>';
} 
add_filter( 'wp_nav_menu_items', 'add_loginout_menu_to_footer', 49, 2 );