Nashwan D

Conditional Themes is an API to switch the themes on certain conditions.
<h4>Usage</h4>
Write an another plugin file and use the Conditional Themes API as the example below:
<pre><code>add_action('plugins_loaded', 'my_conditional_themes_setup', 100);

function my_conditional_themes_setup()
{
 // Switch to Twenty Eleven theme if the visitor use Internet Explorer.
 Conditional_Themes_Manager::register('twentyeleven', function() {
 global $is_IE;
 return (bool) $is_IE;
 });

 // Switch to Twenty Thirteen theme if the user has administrator role.
 Conditional_Themes_Manager::register('twentythirteen', function() {
 return current_user_can('administrator');
 });

 // Switch to a custom theme if the visitor use a mobile device.
 Conditional_Themes_Manager::register('mobile', 'wp_is_mobile');
}
</code></pre>
Another example, With enabling persistent mode.
<pre><code>add_action('plugins_loaded', 'my_conditional_themes_setup', 100);

function my_conditional_themes_setup()
{
 // Enable the switcher persistent mode.
 Conditional_Themes_Manager::set_option('persistent', true);

 // Switch to Twenty Sixteen theme when we being on 2016.
 Conditional_Themes_Manager::register('twentysixteen', function() {
 return (date('Y') == 2016);
 });

 // Switch to Twenty Fifteen theme when the site reaches 500 post.
 Conditional_Themes_Manager::register('twentyfifteen', function() {
 return ((int) wp_count_posts() > 500);
 });
}
</code></pre>
Note: You can use <a href="https://wordpress.org/plugins/code-snippets" rel="ugc">Code Snippets</a> plugin to add the code snippets to your site.
<h4>Contributing</h4>
Developers can contribute to the source code on the <a href="https://github.com/nash-ye/WP-Conditional-Themes" rel="nofollow ugc">Github Repository</a>.

Conditional Themes

Keep up the good work. Plugin exactly doing what it should do. Perfect :)

Awesome Plugin. Neat and Accurate

A simple API to switch the themes on certain conditions.

bartosznowak

kamiljanq

Osom Studio WordPress and WooCommerce Agency

tomziel

rainkom

Osom Multi Theme Switcher lets you run multiple WordPress themes on a single site — assigning different themes to specific pages, posts, post types, categories, tags, or custom URLs.
Built by <a href="https://www.osomstudio.com" rel="nofollow ugc">Osom Studio</a>, a WordPress & WooCommerce agency with 10+ years of experience managing complex multi-theme setups for clients.
We built this plugin because we kept solving the same problem for clients: one WordPress installation, multiple designs. Landing pages that need a completely different look. A WooCommerce store that runs a separate theme from the corporate site. A membership area with its own design system.
Instead of hacking theme conditionals into functions.php every time, we packaged our solution into a plugin.
<h4>When you need this</h4>
<ul>
<li>Landing pages with a unique design — without touching your main theme</li>
<li>WooCommerce stores running a dedicated shop theme alongside a corporate theme</li>
<li>Membership or gated sections with a separate visual identity</li>
<li>Theme testing — preview a new theme on specific pages before switching site-wide</li>
<li>Agencies managing multi-brand WordPress installations from a single dashboard</li>
</ul>
<h4>Key features</h4>
<ul>
<li>Flexible rules — assign themes by page, post, post type, custom URL, category, or tag</li>
<li>Full theme loading — the alternative theme’s functions.php loads completely, so page builders (Elementor, Divi, Beaver Builder) and custom functionality work as expected</li>
<li>Admin theme switcher — access settings for any installed theme directly from the admin bar</li>
<li>Per-user admin theme — each administrator can use their preferred dashboard theme independently</li>
<li>Draft & scheduled support — apply themes to unpublished content for preview and staging</li>
<li>REST API support — configure custom REST API prefixes per theme</li>
<li>ACF compatible — loads Advanced Custom Fields JSON from all active theme directories</li>
<li>No code required — set up everything through the WordPress admin panel</li>
</ul>
<h4>How it works</h4>
<ol>
<li>Install and activate the plugin</li>
<li>Go to Appearance > Theme Switcher</li>
<li>Select a rule type (Page, Post, Post Type, Category, Tag, or Custom URL)</li>
<li>Choose the content to target</li>
<li>Pick the alternative theme</li>
<li>Click Add Rule — changes apply immediately</li>
</ol>
The plugin hooks into WordPress on the <code>setup_theme</code> action, before any theme code runs. This ensures full compatibility with theme features, widgets, customizer settings, and page builders.

Osom Multi Theme Switcher

Use different themes for specific pages, posts, or URLs while keeping your main theme active site-wide.

Conditional Themes vs Osom Multi Theme Switcher