Mobile.class.php

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<?php
/* Copyright (C) NAVER <http://www.navercorp.com> */

class Mobile
{

    var $ismobile = NULL;

    function &getInstance()
    {
        static $theInstance;
        if(!isset($theInstance))
        {
            $theInstance = new Mobile();
        }
        return $theInstance;
    }

    function isFromMobilePhone()
    {
        $oMobile = & Mobile::getInstance();
        return $oMobile->_isFromMobilePhone();
    }

    function _isFromMobilePhone()
    {
        if($this->ismobile !== NULL)
        {
            return $this->ismobile;
        }
        if(Mobile::isMobileEnabled() === false || Context::get('full_browse') || $_COOKIE["FullBrowse"])
        {
            return ($this->ismobile = false);
        }

        $xe_web_path = Context::pathToUrl(_XE_PATH_);

        // default setting. if there is cookie for a device, XE do not have to check if it is mobile or not and it will enhance performace of the server.
        $this->ismobile = FALSE;

        $m = Context::get('m');
        if(strlen($m) == 1)
        {
            if($m == "1")
            {
                $this->ismobile = TRUE;
            }
            elseif($m == "0")
            {
                $this->ismobile = FALSE;
            }
        }
        elseif(isset($_COOKIE['mobile']))
        {
            if($_COOKIE['user-agent'] == md5($_SERVER['HTTP_USER_AGENT']))
            {
                if($_COOKIE['mobile'] == 'true')
                {
                    $this->ismobile = TRUE;
                }
                else
                {
                    $this->ismobile = FALSE;
                }
            }
            else
            {
                $this->ismobile = FALSE;
                setcookie("mobile", FALSE);
                setcookie("user-agent", FALSE);
                if(!$this->isMobilePadCheckByAgent() && $this->isMobileCheckByAgent())
                {
                    $this->ismobile = TRUE;
                }
            }
        }
        else
        {
            if($this->isMobilePadCheckByAgent())
            {
                $this->ismobile = FALSE;
            }
            else
            {
                if($this->isMobileCheckByAgent())
                {
                    $this->ismobile = TRUE;
                }
            }
        }

        if($this->ismobile !== NULL)
        {
            if($this->ismobile == TRUE)
            {
                if($_COOKIE['mobile'] != 'true')
                {
                    $_COOKIE['mobile'] = 'true';
                    setcookie("mobile", 'true');
                }
            }
            elseif($_COOKIE['mobile'] != 'false')
            {
                $_COOKIE['mobile'] = 'false';
                setcookie("mobile", 'false');
            }

            if($_COOKIE['user-agent'] != md5($_SERVER['HTTP_USER_AGENT']))
            {
                setcookie("user-agent", md5($_SERVER['HTTP_USER_AGENT']));
            }
        }

        return $this->ismobile;
    }

    function isMobileCheckByAgent()
    {
        static $UACheck;
        if(isset($UACheck))
        {
            return $UACheck;
        }

        $oMobile = Mobile::getInstance();
        $mobileAgent = array('iPod', 'iPhone', 'Android', 'BlackBerry', 'SymbianOS', 'Bada', 'Tizen', 'Kindle', 'Wii', 'SCH-', 'SPH-', 'CANU-', 'Windows Phone', 'Windows CE', 'POLARIS', 'Palm', 'Dorothy Browser', 'Mobile', 'Opera Mobi', 'Opera Mini', 'Minimo', 'AvantGo', 'NetFront', 'Nokia', 'LGPlayer', 'SonyEricsson', 'HTC');

        if($oMobile->isMobilePadCheckByAgent())
        {
            $UACheck = TRUE;
            return TRUE;
        }

        foreach($mobileAgent as $agent)
        {
            if(stripos($_SERVER['HTTP_USER_AGENT'], $agent) !== FALSE)
            {
                $UACheck = TRUE;
                return TRUE;
            }
        }
        $UACheck = FALSE;
        return FALSE;
    }

    function isMobilePadCheckByAgent()
    {
        static $UACheck;
        if(isset($UACheck))
        {
            return $UACheck;
        }
        $padAgent = array('iPad', 'Android', 'webOS', 'hp-tablet', 'PlayBook');

        // Android with 'Mobile' string is not a tablet-like device, and 'Andoroid' without 'Mobile' string is a tablet-like device.
        // $exceptionAgent[0] contains exception agents for all exceptions.
        $exceptionAgent = array(0 => array('Opera Mini', 'Opera Mobi'), 'Android' => 'Mobile');

        foreach($padAgent as $agent)
        {
            if(strpos($_SERVER['HTTP_USER_AGENT'], $agent) !== FALSE)
            {
                if(!isset($exceptionAgent[$agent]))
                {
                    $UACheck = TRUE;
                    return TRUE;
                }
                elseif(strpos($_SERVER['HTTP_USER_AGENT'], $exceptionAgent[$agent]) === FALSE)
                {
                    // If the agent is the Android, that can be either tablet and mobile phone.
                    foreach($exceptionAgent[0] as $val)
                    {
                        if(strpos($_SERVER['HTTP_USER_AGENT'], $val) !== FALSE)
                        {
                            $UACheck = FALSE;
                            return FALSE;
                        }
                    }
                    $UACheck = TRUE;
                    return TRUE;
                }
            }
        }

        $UACheck = FALSE;
        return FALSE;
    }

    function setMobile($ismobile)
    {
        $oMobile = Mobile::getInstance();
        $oMobile->ismobile = $ismobile;
    }

    function isMobileEnabled()
    {
        $db_info = Context::getDBInfo();
        return ($db_info->use_mobile_view === 'Y');
    }
}
?>