与Dominic的概念相同（不需要成员插件），但扩展为使用一个元框，只对管理员可见，并带有一个包含所有用户的下拉列表（例外）。

借用和改编的代码from this answer. 加入functions.php:

// List Users
add_action( \'admin_init\', \'wpse_33725_users_meta_init\' );
// Save Meta Details
add_action( \'save_post\', \'wpse_33725_save_userlist\' );

function wpse_33725_users_meta_init()
{
    if( current_user_can( \'administrator\' ) )
        add_meta_box( \'users-meta\', \'Authorized User\', \'wpse_33725_users_meta_box\', \'page\', \'side\', \'high\' );
}

function wpse_33725_users_meta_box()
{
    global $post;
    $custom = get_post_custom( $post->ID );
    $users = $custom["users"][0];

    // prepare arguments
    $user_args  = array(
        // exclude users from the list using an array of ID\'s
        \'exclude\' => array(1),
        // order results by display_name
        \'orderby\' => \'display_name\'
    );
    // Create the WP_User_Query object
    $wp_user_query = new WP_User_Query($user_args);
    // Get the results
    $authors = $wp_user_query->get_results();
    // Check for results
    if ( !empty($authors) )
    {
        // Name is your custom field key
        echo "<select name=\'users\'>";
        echo \'<option value=0>All</option>\';
        // loop trough each author
        foreach ( $authors as $author )
        {
            $author_id = get_post_meta( $post->ID, \'users\', true );
            $author_selected = ( $author_id == $author->ID ) ? \'selected="selected"\' : \'\';
            echo \'<option value=\'.$author->ID.\' \'.$author_selected.\'>\'.$author->user_nicename.\'</option>\';
        }
            echo "</select>";
    } 
    else 
    {
        echo \'No authors found\';
    }
}


function wpse_33725_save_userlist()
{
    global $post;

    if ( defined( \'DOING_AUTOSAVE\' ) && DOING_AUTOSAVE ) 
    {
        return $post->ID;
    }

    update_post_meta( $post->ID, "users", $_POST["users"] );
}

$the_user = get_post_meta( $wp_query->post->ID, \'users\', true );

if( \'0\' == $the_user || empty( $the_user ) ) 
{
    echo "this is a public page";
} 
else 
{
    if( get_current_user_id() == $the_user ) 
        echo "this page is for you";
    else 
    { // NOTHING TO SEE, GO TO FRONT PAGE
        wp_redirect(\'/\');
        header("Status: 302");
        exit;
    }
}

我还建议您查看付费会员资格pro（免费）、Premise登录页（付费）和restrict content pro（付费）等插件。这些都可以解决你的问题。

您可以将允许用户的ID添加到特定页面上的自定义字段中。然后使用get_current_user_id() 并在显示内容之前查看是否匹配。

您可以检查current user id 在页的开头get_current_user_id() 功能或您可以检查更多-https://developer.wordpress.org/reference/functions/get_current_user_id/ 并相应地应用条件。