Is there a hook for when you switch themes?

Question

I created a plugin but I just came across a bug that I don't really know how to solve.

When you activate my plugin, it creates a file in the active theme directory and when you deactivate it, it deletes that file.

The problem is, if you activate the plugin, and then switch the theme, the files won't exist in the new theme's directory. Is there a line of code I can add in my plugins functions file to deactivate the plugin before the theme is switched, and then activate it after the new theme has been activated?

Thanks, this is a great community so I know I'll get a great answer. :)

Answer 1

There is a 'switch_theme' action that runs right after the theme is switched.

function my_on_switch_theme($new_theme) {
    $current_themes = get_themes();
    $new_theme_info = $current_themes[$new_theme];
    /*
    $new_theme_info bhould now be an associative array with the following:
    $new_them_info['Title'];
    $new_them_info['Version'];
    $new_them_info['Parent Theme'];
    $new_them_info['Template Dir'];
    $new_them_info['Stylesheet Dir'];
    $new_them_info['Template'];
    $new_them_info['Stylesheet'];
    $new_them_info['Screenshot'];
    $new_them_info['Description'];
    $new_them_info['Author'];
    $new_them_info['Tags'];
    $new_them_info['Theme Root'];
    $new_them_info['Theme Root URI'];
    ...so do you what you need from this.
    */
}
add_action('switch_theme', 'my_on_switch_theme');

Answer 2

In WordPress 1.5 and greater the action you're looking for is called switch theme.

You can see it in source in theme.php.