Restrict acceess of a page in backend

1 comment

1. This can be done in two steps. First, add a hook to the page /wp-admin/edit.php?post_type=page to remove the desired page from appearing to other users. And another hook to redirect non-authorized users from trying to access the page directly /wp-admin/post.php?post=ID&action=edit.

   Here, the post type is page, but it can be changed to any other. Make the adjustments indicated in the comments:

   /**
    * Adjust the following:
    * post_type
    * User ID
    * Post ID
    */
   
   add_action( 'load-edit.php', 'load_custom_filter_wpse_94387' );
   add_action( 'load-post.php', 'block_page_access_wpse_94387' );
   
   /**
    * Executed only in /wp-admin/edit.php
    *
    * Checks current post type and bail if not correct
    */
   function load_custom_filter_wpse_94387()
   {
       global $typenow;
   
       // Not the correct post type, do nothing
       if( 'page' != $typenow ) // <--- adjust
           return;
   
       add_filter( 'posts_where' , 'posts_where_wpse_94387' );
   }
   
   /**
    * If not authorized user, remove page from listing
    */
   function posts_where_wpse_94387( $where ) 
   {
       $current_user = wp_get_current_user();
   
       if ( 2 == $current_user->ID ) // <--- adjust
           return $where;
   
       $where .= ' AND ID != 119'; // <--- adjust
       return $where;
   }
   
   /**
    * Check if unauthorized user is trying to access restricted page
    */
   function block_page_access_wpse_94387()
   {
       // Check for post=119, if it is not this one, do nothing
       if( !isset( $_GET['post'] ) || '119' != $_GET['post'] ) // <--- adjust
           return;
   
       // Check for user, if allowed user, do nothing
       $current_user = wp_get_current_user();  
       if ( 2 == $current_user->ID ) // <--- adjust
           return;
   
       // Invalid attempt to edit the page, redirect
       wp_redirect( admin_url( 'edit.php?post_type=page' ) );
       exit();
   }
   

   _{Relevant Q&A’s:
   – Where to put my code: plugin or functions.php?
   – Update post counts (published, draft, unattached) in admin interface}

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