Code-Snippets-Functions/Execute a function on a child site/Relevanssi/exclude-pdf-files-search-results.txt

add_filter( 'relevanssi_indexing_restriction', 'rlv_no_pdf_attachments' );
function rlv_no_pdf_attachments( $restriction ) {
    global $wpdb;
    $restriction['mysql']  .= " AND post.ID NOT IN (SELECT ID FROM $wpdb->posts WHERE post_type = 'attachment' AND (post_mime_type = 'application/pdf' OR post_parent = 0) ) ";
    $restriction['reason'] .= ' No PDFs';
    return $restriction;
}