Redirect WordPress search to WPGB search format

code.php

<?php

/**
 * Redirect WordPress search to WPGB search format
 */
add_action('template_redirect', function() {
    
    if (isset($_GET['s']) && !empty($_GET['s'])) {
        
        $search_query = sanitize_text_field($_GET['s']);
        
        $redirect_url = home_url('/search/') . '?_search_filter=' . urlencode($search_query);
        
        wp_safe_redirect($redirect_url, 301);
        exit;
    }
}, 1);