system/libraries/User_agent.php
<?php
/**
* CodeIgniter
*
* An open source application development framework for PHP
*
* This content is released under the MIT License (MIT)
*
* Copyright (c) 2019 - 2022, CodeIgniter Foundation
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to deal
* in the Software without restriction, including without limitation the rights
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
* THE SOFTWARE.
*
* @package CodeIgniter
* @author EllisLab Dev Team
* @copyright Copyright (c) 2008 - 2014, EllisLab, Inc. (https://ellislab.com/)
* @copyright Copyright (c) 2014 - 2019, British Columbia Institute of Technology (https://bcit.ca/)
* @copyright Copyright (c) 2019 - 2022, CodeIgniter Foundation (https://codeigniter.com/)
* @license https://opensource.org/licenses/MIT MIT License
* @link https://codeigniter.com
* @since Version 1.0.0
* @filesource
*/
defined('BASEPATH') OR exit('No direct script access allowed');
/**
* User Agent Class
*
* Identifies the platform, browser, robot, or mobile device of the browsing agent
*
* @package CodeIgniter
* @subpackage Libraries
* @category User Agent
* @author EllisLab Dev Team
* @link https://codeigniter.com/userguide3/libraries/user_agent.html
*/
class CI_User_agent {
/**
* Current user-agent
*
* @var string
*/
public $agent = NULL;
/**
* Flag for if the user-agent belongs to a browser
*
* @var bool
*/
public $is_browser = FALSE;
/**
* Flag for if the user-agent is a robot
*
* @var bool
*/
public $is_robot = FALSE;
/**
* Flag for if the user-agent is a mobile browser
*
* @var bool
*/
public $is_mobile = FALSE;
/**
* Languages accepted by the current user agent
*
* @var array
*/
public $languages = array();
/**
* Character sets accepted by the current user agent
*
* @var array
*/
public $charsets = array();
/**
* List of platforms to compare against current user agent
*
* @var array
*/
public $platforms = array();
/**
* List of browsers to compare against current user agent
*
* @var array
*/
public $browsers = array();
/**
* List of mobile browsers to compare against current user agent
*
* @var array
*/
public $mobiles = array();
/**
* List of robots to compare against current user agent
*
* @var array
*/
public $robots = array();
/**
* Current user-agent platform
*
* @var string
*/
public $platform = '';
/**
* Current user-agent browser
*
* @var string
*/
public $browser = '';
/**
* Current user-agent version
*
* @var string
*/
public $version = '';
/**
* Current user-agent mobile name
*
* @var string
*/
public $mobile = '';
/**
* Current user-agent robot name
*
* @var string
*/
public $robot = '';
/**
* HTTP Referer
*
* @var mixed
*/
public $referer;
// --------------------------------------------------------------------
/**
* Constructor
*
* Sets the User Agent and runs the compilation routine
*
* @return void
*/
public function __construct()
{
$this->_load_agent_file();
if (isset($_SERVER['HTTP_USER_AGENT']))
{
$this->agent = trim($_SERVER['HTTP_USER_AGENT']);
$this->_compile_data();
}
log_message('info', 'User Agent Class Initialized');
}
// --------------------------------------------------------------------
/**
* Compile the User Agent Data
*
* @return bool
*/
protected function _load_agent_file()
{
if (($found = file_exists(APPPATH.'config/user_agents.php')))
{
include(APPPATH.'config/user_agents.php');
}
if (file_exists(APPPATH.'config/'.ENVIRONMENT.'/user_agents.php'))
{
include(APPPATH.'config/'.ENVIRONMENT.'/user_agents.php');
$found = TRUE;
}
if ($found !== TRUE)
{
return FALSE;
}
$return = FALSE;
if (isset($platforms))
{
$this->platforms = $platforms;
unset($platforms);
$return = TRUE;
}
if (isset($browsers))
{
$this->browsers = $browsers;
unset($browsers);
$return = TRUE;
}
if (isset($mobiles))
{
$this->mobiles = $mobiles;
unset($mobiles);
$return = TRUE;
}
if (isset($robots))
{
$this->robots = $robots;
unset($robots);
$return = TRUE;
}
return $return;
}
// --------------------------------------------------------------------
/**
* Compile the User Agent Data
*
* @return bool
*/
protected function _compile_data()
{
$this->_set_platform();
foreach (array('_set_robot', '_set_browser', '_set_mobile') as $function)
{
if ($this->$function() === TRUE)
{
break;
}
}
}
// --------------------------------------------------------------------
/**
* Set the Platform
*
* @return bool
*/
protected function _set_platform()
{
if (is_array($this->platforms) && count($this->platforms) > 0)
{
foreach ($this->platforms as $key => $val)
{
if (preg_match('|'.preg_quote($key).'|i', $this->agent))
{
$this->platform = $val;
return TRUE;
}
}
}
$this->platform = 'Unknown Platform';
return FALSE;
}
// --------------------------------------------------------------------
/**
* Set the Browser
*
* @return bool
*/
protected function _set_browser()
{
if (is_array($this->browsers) && count($this->browsers) > 0)
{
foreach ($this->browsers as $key => $val)
{
if (preg_match('|'.$key.'.*?([0-9\.]+)|i', $this->agent, $match))
{
$this->is_browser = TRUE;
$this->version = $match[1];
$this->browser = $val;
$this->_set_mobile();
return TRUE;
}
}
}
return FALSE;
}
// --------------------------------------------------------------------
/**
* Set the Robot
*
* @return bool
*/
protected function _set_robot()
{
if (is_array($this->robots) && count($this->robots) > 0)
{
foreach ($this->robots as $key => $val)
{
if (preg_match('|'.preg_quote($key).'|i', $this->agent))
{
$this->is_robot = TRUE;
$this->robot = $val;
$this->_set_mobile();
return TRUE;
}
}
}
return FALSE;
}
// --------------------------------------------------------------------
/**
* Set the Mobile Device
*
* @return bool
*/
protected function _set_mobile()
{
if (is_array($this->mobiles) && count($this->mobiles) > 0)
{
foreach ($this->mobiles as $key => $val)
{
if (FALSE !== (stripos($this->agent, $key)))
{
$this->is_mobile = TRUE;
$this->mobile = $val;
return TRUE;
}
}
}
return FALSE;
}
// --------------------------------------------------------------------
/**
* Set the accepted languages
*
* @return void
*/
protected function _set_languages()
{
if ((count($this->languages) === 0) && ! empty($_SERVER['HTTP_ACCEPT_LANGUAGE']))
{
$this->languages = explode(',', preg_replace('/(;\s?q=[0-9\.]+)|\s/i', '', strtolower(trim($_SERVER['HTTP_ACCEPT_LANGUAGE']))));
}
if (count($this->languages) === 0)
{
$this->languages = array('Undefined');
}
}
// --------------------------------------------------------------------
/**
* Set the accepted character sets
*
* @return void
*/
protected function _set_charsets()
{
if ((count($this->charsets) === 0) && ! empty($_SERVER['HTTP_ACCEPT_CHARSET']))
{
$this->charsets = explode(',', preg_replace('/(;\s?q=.+)|\s/i', '', strtolower(trim($_SERVER['HTTP_ACCEPT_CHARSET']))));
}
if (count($this->charsets) === 0)
{
$this->charsets = array('Undefined');
}
}
// --------------------------------------------------------------------
/**
* Is Browser
*
* @param string $key
* @return bool
*/
public function is_browser($key = NULL)
{
if ( ! $this->is_browser)
{
return FALSE;
}
// No need to be specific, it's a browser
if ($key === NULL)
{
return TRUE;
}
// Check for a specific browser
return (isset($this->browsers[$key]) && $this->browser === $this->browsers[$key]);
}
// --------------------------------------------------------------------
/**
* Is Robot
*
* @param string $key
* @return bool
*/
public function is_robot($key = NULL)
{
if ( ! $this->is_robot)
{
return FALSE;
}
// No need to be specific, it's a robot
if ($key === NULL)
{
return TRUE;
}
// Check for a specific robot
return (isset($this->robots[$key]) && $this->robot === $this->robots[$key]);
}
// --------------------------------------------------------------------
/**
* Is Mobile
*
* @param string $key
* @return bool
*/
public function is_mobile($key = NULL)
{
if ( ! $this->is_mobile)
{
return FALSE;
}
// No need to be specific, it's a mobile
if ($key === NULL)
{
return TRUE;
}
// Check for a specific robot
return (isset($this->mobiles[$key]) && $this->mobile === $this->mobiles[$key]);
}
// --------------------------------------------------------------------
/**
* Is this a referral from another site?
*
* @return bool
*/
public function is_referral()
{
if ( ! isset($this->referer))
{
if (empty($_SERVER['HTTP_REFERER']))
{
$this->referer = FALSE;
}
else
{
$referer_host = @parse_url($_SERVER['HTTP_REFERER'], PHP_URL_HOST);
$own_host = parse_url((string) config_item('base_url'), PHP_URL_HOST);
$this->referer = ($referer_host && $referer_host !== $own_host);
}
}
return $this->referer;
}
// --------------------------------------------------------------------
/**
* Agent String
*
* @return string
*/
public function agent_string()
{
return $this->agent;
}
// --------------------------------------------------------------------
/**
* Get Platform
*
* @return string
*/
public function platform()
{
return $this->platform;
}
// --------------------------------------------------------------------
/**
* Get Browser Name
*
* @return string
*/
public function browser()
{
return $this->browser;
}
// --------------------------------------------------------------------
/**
* Get the Browser Version
*
* @return string
*/
public function version()
{
return $this->version;
}
// --------------------------------------------------------------------
/**
* Get The Robot Name
*
* @return string
*/
public function robot()
{
return $this->robot;
}
// --------------------------------------------------------------------
/**
* Get the Mobile Device
*
* @return string
*/
public function mobile()
{
return $this->mobile;
}
// --------------------------------------------------------------------
/**
* Get the referrer
*
* @return bool
*/
public function referrer()
{
return empty($_SERVER['HTTP_REFERER']) ? '' : trim($_SERVER['HTTP_REFERER']);
}
// --------------------------------------------------------------------
/**
* Get the accepted languages
*
* @return array
*/
public function languages()
{
if (count($this->languages) === 0)
{
$this->_set_languages();
}
return $this->languages;
}
// --------------------------------------------------------------------
/**
* Get the accepted Character Sets
*
* @return array
*/
public function charsets()
{
if (count($this->charsets) === 0)
{
$this->_set_charsets();
}
return $this->charsets;
}
// --------------------------------------------------------------------
/**
* Test for a particular language
*
* @param string $lang
* @return bool
*/
public function accept_lang($lang = 'en')
{
return in_array(strtolower($lang), $this->languages(), TRUE);
}
// --------------------------------------------------------------------
/**
* Test for a particular character set
*
* @param string $charset
* @return bool
*/
public function accept_charset($charset = 'utf-8')
{
return in_array(strtolower($charset), $this->charsets(), TRUE);
}
// --------------------------------------------------------------------
/**
* Parse a custom user-agent string
*
* @param string $string
* @return void
*/
public function parse($string)
{
// Reset values
$this->is_browser = FALSE;
$this->is_robot = FALSE;
$this->is_mobile = FALSE;
$this->browser = '';
$this->version = '';
$this->mobile = '';
$this->robot = '';
// Set the new user-agent string and parse it, unless empty
$this->agent = $string;
if ( ! empty($string))
{
$this->_compile_data();
}
}
}