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<?php /** * CodeIgniter * * An open source application development framework for PHP * * This content is released under the MIT License (MIT) * * Copyright (c) 2014 - 2019, British Columbia Institute of Technology * * 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/) * @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/user_guide/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(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(); } } }