/** @closure $replaces; status: working */
    $replaces = function ($subject, $patterns, $replaces)
    {
        $patterns = array_values($patterns);
        $replaces = array_values($replaces);
        if (count($patterns) !== count($replaces)) return false;

        for ($i=0;$i<count($patterns);$i++)

            $subject = preg_replace($patterns[$i], $replaces[$i], $subject);

        return $subject;
    };

    $cpath = "/website-capture/$cdir/";

    // run as closure
    $body = $replaces($body,
        array (
            '~<script\b(?>[^<]++|<(?!/script))*<\/script>(*SKIP)(?!)|\b(?:href|src)\s*=\s*(["\']?+)\K(?:/(?!/)|(?=[\s>]|\1))~i',         # html
            '~\b(?::url)\s*\(\s*(["\']?+)\K(?:/(?!/)|(?=[\s>]|\1))~i',            # css
        ),
        array (
            $cpath,                                                            # /html
            $cpath,                                                            # /css
        )
    );