src/Debug/Utilities.php
public static function serializeLog($data)
    {
        $str = \serialize($data);
        if (\function_exists('gzdeflate')) {
            $str = \gzdeflate($str);
        }
        $str = \chunk_split(\base64_encode($str), 124);
        return "START DEBUG\n"
            .$str    // chunk_split appends a "\r\n"
            .'END DEBUG';
    }
public static function serializeLog($data)
    {
        $str = \serialize($data);
        if (\function_exists('gzdeflate')) {
            $str = \gzdeflate($str);
        }
        $str = \chunk_split(\base64_encode($str), 124);
        return "START DEBUG\n"
            .$str    // chunk_split appends a "\r\n"
            .'END DEBUG';
    }
serialize log for emailing

@param array $data log data to serialize

@return string