Exclude PDF Viewers from WordPress Search Results.

hide-pdf-viewer-from-wordpress-search.php

/**
* Please add this code in your active theme's functions.php file
* This will exclude PDF Viewer from WordPress Search Results
*/

add_action( 'init', 'tnc_hide_pvfw_search', 99 );

function tnc_hide_pvfw_search() {
    global $wp_post_types;

    if ( post_type_exists( 'pdfviewer' ) ) {
        $wp_post_types['pdfviewer']->exclude_from_search = true;
    }
}