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Detect Yoast SEO plugin

I want to detect Yoast SEO. I already use this function:

function active( $plugin ) {
    $network_active = false;
    if ( is_multisite() ) {
        $plugins = get_site_option( 'active_sitewide_plugins' );
        if ( isset( $plugins[$plugin] ) ) {
            $network_active = true;
        }
    }
    return in_array( $plugin, get_option( 'active_plugins' ) ) || $network_active;
}

if ( active( 'wordpress-seo/wp-seo.php' ) {

And that works fine. But if Yoast ever thinks of renaming wordpress-seo/wp-seo.php, this function becomes useless. So we need to add an backup, something which is hard to change, like the WPSEO_VERSION constant:

if ( active( 'wordpress-seo/wp-seo.php' ) {
    // activate
} elseif( defined( 'WPSEO_VERSION' )) {
    // activate
} else {
    // deactivate
}

This line if( defined( 'WPSEO_VERSION' )) { for some reason does not detect Yoast.. how is that possible?

Thanks everyone.

Tags:

4

Answers


  1. 0

    Your function is probably checking WPSEO_VERSION before YOAST is loaded. Try using one of the following hooks to run the function that checks the WPSEO_VERSION constant.

    add_action('init', 'active');

add_action('plugins_loaded', 'active');
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  2. 0

    The most simple method to detect it be the <!-- / Yoast SEO plugin. --> that Yoast adds in the source code, you can find it and if it’s there, you got it. For example, here is a site that you can see in its source code.

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  3. 0

    The simplest way is:

    if ( 
    is_plugin_active( 'wordpress-seo/wp-seo.php' ) 
    || is_plugin_active( 'wordpress-seo-premium/wp-seo-premium.php' )
) {
   /* Let's do cool things */
}

    Function Reference/is plugin active

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  4. 0

    This is as safe you can get:

    if(in_array('wordpress-seo/wp-seo.php', apply_filters('active_plugins', get_option('active_plugins')))){ 
    /* Yoast is active */
}

    And I would also suggest:

    if(class_exists('WPSEO_Options')){
    /* Yoast is active */
    if(WPSEO_Options::get('breadcrumbs-enable', false)){
        /* Yoast breadcrumbs is active */
    }
}
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