WpRecipes.com - Daily recipes to cook with WordPress

To achieve this recipe, you'll have to define a custom field named private, with true as a value, to each private post will have. In our WordPress loop, we'll check if the post have a private custom field, and if true is its value. If yes, we'll check out if the user is logged in. If he is, the post will be displayed. Otherwise, it will not.

Replace your current WordPress loop with that one:

<?php
if (have_posts()) :
     while (have_posts()) : the_post();
     $private = get_post_custom_values("private");
         if (  isset($private[0]) && $private == "true"  ) {
 	     if (is_user_logged_in()) {
	     	    // Display private post to logged user
	     }
	 } else {
	     //Display public post to everyone
         }
     endwhile;
endif; ?>