embolden · June 1, 2016 19:28 · embolden · Jun 2, 2016
diff --git a/wp-menu-cache.php b/wp-menu-cache.php
 <?php
 function _s_nav_menu( $menu_options ) {
 	$transient_name = $menu_options['theme_location'] . '-menu-cache';
 	$menu           = null;
 	$echo           = isset( $menu_options['echo'] ) ? $menu_options['echo'] : true;

 	if( $menu = get_transient( $transient_name ) ) {
 		// Do nothing; jut assign the transient to $menu
 	}else {
 		// Reset the echo value; we need to return to set
 		$menu_options['echo'] = 0;
 		$menu = wp_nav_menu( $menu_options );
 		set_transient( $transient_name, $menu, DAY_IN_SECONDS );
 	}

 	if( $echo ) {
 		echo $menu;
 	}else {
 		return $menu;
 	}
 }

 function _s_clear_nav_menu_transient( $menu_id ) {
 	$theme_locations = get_nav_menu_locations();

 	if( $keys = array_keys( $theme_locations, $menu_id ) ) {
 		foreach( $keys as $key ) {
 			$transient_name = $key . '-menu-cache';
 			delete_transient( $transient_name );
 		}
 	}
 }
 add_action( 'wp_update_nav_menu', '_s_clear_nav_menu_transient' );
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