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.

Seth Smigelski

Ever wanted to serve a dedicated theme to visitors on handheld devices instead of a theme that is fine-tuned for big screen traffic?
Slim Mobile Theme Switcher is a highly optimized, lightweight plugin designed for websites that need to serve a different theme to mobile devices while preserving the primary desktop experience.
Instead of relying on clunky, resource-heavy device detection libraries, this plugin uses streamlined, modern user-agent detection to instantly route users to the correct theme before the page even loads.
<h3>Key Features</h3>
<ul>
<li>Three-way Theme Routing: Serve up to three different themes simultaneously. Set one theme for Mobile Phones, one for Desktops, and optionally enable a dedicated theme specifically for Tablets (iPads/Android tablets).</li>
<li>True Mobile Detection: Uses refined regex to separate small-screen phones from tablets (iPads/Android tablets).</li>
<li>Zero-Friction Setup: Select your themes from a simple dropdown menu. No coding required.</li>
<li>Manual Overrides: Allow users to manually switch between views using <code>?theme=handheld</code> or <code>?theme=active</code> or <code>?theme=tablet</code>.</li>
<li>Persistent Choice: Activating the ‘Remember Visitor’s Choice’ option ensures that when a user has manually selected a different theme, this preference is saved for 30 days via cookies.</li>
<li>No Bloat: Zero front-end CSS or JS added by the plugin itself.</li>
<li>Developer Friendly: Built by a developer for developers.</li>
</ul>

Slim Mobile Theme Switcher

Serve a lightweight mobile theme to phones while keeping desktops on your primary theme. Includes dedicated tablet routing.

Conditional Themes vs Slim Mobile Theme Switcher