Josh Eaton

A small plugin that lets you “hide” the front-end of a site, all front-end requests of logged-in users are redirected to the WP Dashboard (filterable).
Useful mainly for developers, if you’re developing a site and want to give users access to see the dashboard while you’re working on the front-end. Also can be used if you have a site with no front-end and always want users to stay on the dashboard.
Filters included:
<ul>
<li><code>rfe_redirect_caps</code>: Control capabilities required to bypass redirect, lets Administrators access front-end by default (default: <code>manage_options</code>) </li>
<li><code>rfe_redirect_url</code>: Change the redirect URL (default: <code>admin_url()</code>)</li>
</ul>

Redirect Front-end

A small plugin that lets you "hide" the front-end of a site, redirecting to the WP Dashboard.

Adam Walter

Admin Notice is a very simple plugin that allows you to display custom notices in the WordPress admin that is visible to all users.
Control over the notice text and styling is available from the plugin’s settings page.
Developers can use the <code>admin_notice_enable</code> hook to control the notice’s visibility on a more granular level. The following example demonstrates how to show the notice only in the “Posts” area of the admin.
<pre><code>add_filter('admin_notice_enable', function($enabled) {

 $screen = get_current_screen();

 if (isset($screen->post_type) && $screen->post_type !== 'post') {
 $enabled = false;
 }

 return $enabled;

}, 10, 1);
</code></pre>

Admin Notice

Nice Plugin!

Display a custom notice to all users in the WordPress admin.

Redirect Front-end vs Admin Notice