GEX pattern to match the browser version string within the user agent string.
			$pattern = '#(?<browser>Version|' . $patternBrowser . ')[/ :]+(?<version>[0-9.|a-zA-Z.]*)#';

			// Attempt to find version strings in the user agent string.
			$matches = array();

			if (preg_match_all($pattern, $userAgent, $matches))
			{
				// Do we have both a Version and browser match?
				if (\count($matches['browser']) == 2)
				{
					// See whether Version or browser came first, and use the number accordingly.
					if (strripos($userAgent, 'Version') < strripos($userAgent, $patternBrowser))
					{
						$this->browserVersion = $matches['version'][0];
					}
					else
					{
						$this->browserVersion = $matches['version'][1];
					}
				}
				elseif (\count($matches['browser']) > 2)
				{
					$key = array_search('Version', $matches['browser']);

					if ($key)
					{
						$this->browserVersion = $matches['version'][$key];
					}
				}
				else
				{
					// We only have a Version or a browser so use what we have.
					$this->browserVersion = $matches['version'][0];
				}
			}
		}

		// Mark this detection routine as run.
		$this->detection['browser'] = true;
	}

	/**
	 * Method to detect the accepted response encoding by the client.
	 *
	 * @param   string  $acceptEncoding  The client accept encoding string to parse.
	 *
	 * @return  void
	 *
	 * @since   1.0
	 */
	protected function detectEncoding($acceptEncoding)
	{
		// Parse the accepted encodings.
		$this->encodings = array_map('trim', (array) explode(',', $acceptEncoding));

		// Mark this detection routine as run.
		$this->detection['acceptEncoding'] = true;
	}

	/**
	 * Detects the client rendering engine in a user agent string.
	 *
	 * @param   string  $userAgent  The user-agent string to parse.
	 *
	 * @return  void
	 *
	 * @since   1.0
	 */
	protected function detectEngine($userAgent)
	{
		if (stripos($userAgent, 'MSIE') !== false || stripos($userAgent, 'Trident') !== false)
		{
			// Attempt to detect the client engine -- starting with the most popular ... for now.
			$this->engine = self::TRIDENT;
		}
		elseif (stripos($userAgent, 'Edge') !== false || stripos($userAgent, 'EdgeHTML') !== false)
		{
			$this->engine = self::EDGE;
		}
		elseif (stripos($userAgent, 'Edg') !== false)
		{
			$this->engine = self::BLINK;
		}
		elseif (stripos($userAgent, 'Chrome') !== false)
		{
			$result  = explode('/', stristr($userAgent, 'Chrome'));
			$version = explode(' ', $result[1]);

			if ($version[0] >= 28)
			{
				$this->engine = self::BLINK;
			}
			else
			{
				$this->engine = self::WEBKIT;
			}
		}
		elseif (stripos($userAgent, 'AppleWebKit') !== false || stripos($userAgent, 'blackberry') !== false)
		{
			if (stripos($userAgent, 'AppleWebKit') !== false)
			{
				$result  = explode('/', stristr($userAgent, 'AppleWebKit'));
				$version = explode(' ', $result[1]);

				if ($version[0] === 537.36)
				{
					// AppleWebKit/537.36 is Blink engine specific, exception is Blink emulated IEMobile, Trident or Edge
					$this->engine = self::BLINK;
				}
			}

			// Evidently blackberry uses WebKit and doesn't necessarily report it.  Bad RIM.
			$this->engine = self::WEBKIT;
		}
		elseif (stripos($userAgent, 'Gecko') !== false && stripos($userAgent, 'like Gecko') === false)
		{
			// We have to check for like Gecko because some other browsers spoof Gecko.
			$this->engine = self::GECKO;
		}
		elseif (stripos($userAgent, 'Opera') !== false || stripos($userAgent, 'Presto') !== false)
		{
			$version = false;

			if (preg_match('/Opera[\/| ]?([0-9.]+)/u', $userAgent, $match))
			{
				$version = \floatval($match[1]);
			}

			if (preg_match('/Version\/([0-9.]+)/u', $userAgent, $match))
			{
				if (\floatval($match[1]) >= 10)
				{
					$version = \floatval($match[1]);
				}
			}

			if ($version !== false && $version >= 15)
			{
				$this->engine = self::BLINK;
			}
			else
			{
				$this->engine = self::PRESTO;
			}
		}
		elseif (stripos($userAgent, 'KHTML') !== false)
		{
			// *sigh*
			$this->engine = self::KHTML;
		}
		elseif (stripos($userAgent, 'Amaya') !== false)
		{
			// Lesser known engine but it finishes off the major list from Wikipedia :-)
			$this->engine = self::AMAYA;
		}

		// Mark this detection routine as run.
		$this->detection['engine'] = true;
	}

	/**
	 * Method to detect the accepted languages by the client.
	 *
	 * @param   mixed  $acceptLanguage  The client accept language string to parse.
	 *
	 * @return  void
	 *
	 * @since   1.0
	 */
	protected function detectLanguage($acceptLanguage)
	{
		// Parse the accepted encodings.
		$this->languages = array_map('trim', (array) explode(',', $acceptLanguage));

		// Mark this detection routine as run.
		$this->detection['acceptLanguage'] = true;
	}

	/**
	 * Detects the client platform in a user agent string.
	 *
	 * @param   string  $userAgent  The user-agent string to parse.
	 *
	 * @return  void
	 *
	 * @since   1.0
	 */
	protected function detectPlatform($userAgent)
	{
		// Attempt to detect the client platform.
		if (stripos($userAgent, 'Windows') !== false)
		{
			$this->platform = self::WINDOWS;

			// Let's look at the specific mobile options in the Windows space.
			if (stripos($userAgent, 'Windows Phone') !== false)
			{
				$this->mobile   = true;
				$this->platform = self::WINDOWS_PHONE;
			}
			elseif (stripos($userAgent, 'Windows CE') !== false)
			{
				$this->mobile   = true;
				$this->platform = self::WINDOWS_CE;
			}
		}
		elseif (stripos($userAgent, 'iPhone') !== false)
		{
			// Interestingly 'iPhone' is present in all iOS devices so far including iPad and iPods.
			$this->mobile   = true;
			$this->platform = self::IPHONE;

			// Let's look at the specific mobile options in the iOS space.
			if (stripos($userAgent, 'iPad') !== false)
			{
				$this->platform = self::IPAD;
			}
			elseif (stripos($userAgent, 'iPod') !== false)
			{
				$this->platform = self::IPOD;
			}
		}
		elseif (stripos($userAgent, 'iPad') !== false)
		{
			// In case where iPhone is not mentioned in iPad user agent string
			$this->mobile   = true;
			$this->platform = self::IPAD;
		}
		elseif (stripos($userAgent, 'iPod') !== false)
		{
			// In case where iPhone is not mentioned in iPod user agent string
			$this->mobile   = true;
			$this->platform = self::IPOD;
		}
		elseif (preg_match('/macintosh|mac os x/i', $userAgent))
		{
			// This has to come after the iPhone check because mac strings are also present in iOS devices.
			$this->platform = self::MAC;
		}
		elseif (stripos($userAgent, 'Blackberry') !== false)
		{
			$this->mobile   = true;
			$this->platform = self::BLACKBERRY;
		}
		elseif (stripos($userAgent, 'Android') !== false)
		{
			$this->mobile   = true;
			$this->platform = self::ANDROID;
			/**
			 * Attempt to distinguish between Android phones and tablets
			 * There is no totally foolproof method but certain rules almost always hold
			 *   Android 3.x is only used for tablets
			 *   Some devices and browsers encourage users to change their UA string to include Tablet.
			 *   Google encourages manufacturers to exclude the string Mobile from tablet device UA strings.
			 *   In some modes Kindle Android devices include the string Mobile but they include the string Silk.
			 */
			if (stripos($userAgent, 'Android 3') !== false || stripos($userAgent, 'Tablet') !== false
				|| stripos($userAgent, 'Mobile') === false || stripos($userAgent, 'Silk') !== false)
			{
				$this->platform = self::ANDROIDTABLET;
			}
		}
		elseif (stripos($userAgent, 'Linux') !== false)
		{
			$this->platform = self::LINUX;
		}

		// Mark this detection routine as run.
		$this->detection['platform'] = true;
	}

	/**
	 * Determines if the browser is a robot or not.
	 *
	 * @param   string  $userAgent  The user-agent string to parse.
	 *
	 * @return  void
	 *
	 * @since   1.0
	 */
	protected function detectRobot($userAgent)
	{
		if (preg_match('/http|bot|bingbot|googlebot|robot|spider|slurp|crawler|curl|^$/i', $userAgent))
		{
			$this->robot = true;
		}
		else
		{
			$this->robot = false;
		}

		$this->detection['robot'] = true;
	}

	/**
	 * Fills internal array of headers
	 *
	 * @return  void
	 *
	 * @since   1.3.0
	 */
	protected function detectHeaders()
	{
		if (\function_exists('getallheaders'))
		{
			// If php is working under Apache, there is a special function
			$this->headers = getallheaders();
		}
		else
		{
			// Else we fill headers from $_SERVER variable
			$this->headers = array();

			foreach ($_SERVER as $name => $value)
			{
				if (substr($name, 0, 5) == 'HTTP_')
				{
					$this->headers[str_replace(' ', '-', ucwords(strtolower(str_replace('_', ' ', substr($name, 5)))))] = $value;
				}
			}
		}

		// Mark this detection routine as run.
		$this->detection['headers'] = true;
	}
}
Error