Symfony\Component\BrowserKit\Cookie::fromString PHP Method

    static public function fromString($cookie, $url = null)
    {
        $parts = explode(';', $cookie);

        if (false === strpos($parts[0], '=')) {
            throw new \InvalidArgumentException('The cookie string "%s" is not valid.');
        }

        list($name, $value) = explode('=', array_shift($parts), 2);

        $values = array(
            'name'     => trim($name),
            'value'    => trim($value),
            'expires'  =>  null,
            'path'     => null,
            'domain'   => '',
            'secure'   => false,
            'httponly' => false,
            'passedRawValue' => true,
        );

        if (null !== $url) {
            if ((false === $urlParts = parse_url($url)) || !isset($urlParts['host']) || !isset($urlParts['path'])) {
                throw new \InvalidArgumentException(sprintf('The URL "%s" is not valid.', $url));
            }
            $parts = array_merge($urlParts, $parts);

            $values['domain'] = $parts['host'];
            $values['path'] = substr($parts['path'], 0, strrpos($parts['path'], '/'));
        }

        foreach ($parts as $part) {
            $part = trim($part);

            if ('secure' === strtolower($part)) {
                // Ignore the secure flag if the original URI is not given or is not HTTPS
                if (!$url || !isset($urlParts['scheme']) || 'https' != $urlParts['scheme']) {
                    continue;
                }

                $values['secure'] = true;

                continue;
            }

            if ('httponly' === strtolower($part)) {
                $values['httponly'] = true;

                continue;
            }

            if (2 === count($elements = explode('=', $part, 2))) {
                if ('expires' === $elements[0]) {
                    if (false === $date = \DateTime::createFromFormat(static::DATE_FORMAT, $elements[1], new \DateTimeZone('UTC'))) {
                        throw new \InvalidArgumentException(sprintf('The expires part of cookie is not valid (%s).', $elements[1]));
                    }

                    $elements[1] = $date->getTimestamp();
                }

                $values[strtolower($elements[0])] = $elements[1];
            }
        }

        return new static(
            $values['name'],
            $values['value'],
            $values['expires'],
            $values['path'],
            $values['domain'],
            $values['secure'],
            $values['httponly'],
            $values['passedRawValue']
        );
    }

 /**
  * Parse the standard `Header-name: value' headers into
  * individual header name/value pairs
  *
  * @param string $header
  */
 private function parseHeader($header)
 {
     if (empty($header)) {
         return;
     }
     $pos = strpos($header, ": ");
     if (false !== $pos) {
         $name = trim(substr($header, 0, $pos));
         $value = substr($header, $pos + 2);
         if (strtolower($name) == "set-cookie") {
             $cookie = CookieParser::fromString($value);
             $this->cookies[] = new Cookie($cookie->getName(), $cookie->getRawValue(), (int) $cookie->getExpiresTime(), $cookie->getPath(), $cookie->getDomain(), $cookie->isSecure(), $cookie->isHttpOnly());
         } else {
             $this->headers[$name] = $value;
         }
     }
 }