(PHP) 프로그램 에서 현재 사용자 단말기 가 휴대 전화 등 모 바 일 단말기 임 을 어떻게 판단 합 니까?

/**
 * 
 *   php $_SERVER['HTTP_USER_AGENT']                              PC     
 * @author           discuz3x
 * @lastmodify    2014-04-09
 * @return  BOOL
 */
function checkmobile() {
 global $_G;
 $mobile = array();
//        $_SERVER['HTTP_USER_AGENT']         
 static $touchbrowser_list =array('iphone', 'android', 'phone', 'mobile', 'wap', 'netfront', 'java', 'opera mobi', 'opera mini',
    'ucweb', 'windows ce', 'symbian', 'series', 'webos', 'sony', 'blackberry', 'dopod', 'nokia', 'samsung',
    'palmsource', 'xda', 'pieplus', 'meizu', 'midp', 'cldc', 'motorola', 'foma', 'docomo', 'up.browser',
    'up.link', 'blazer', 'helio', 'hosin', 'huawei', 'novarra', 'coolpad', 'webos', 'techfaith', 'palmsource',
    'alcatel', 'amoi', 'ktouch', 'nexian', 'ericsson', 'philips', 'sagem', 'wellcom', 'bunjalloo', 'maui', 'smartphone',
    'iemobile', 'spice', 'bird', 'zte-', 'longcos', 'pantech', 'gionee', 'portalmmm', 'jig browser', 'hiptop',
    'benq', 'haier', '^lct', '320x320', '240x320', '176x220');
//window       【  】
 static $mobilebrowser_list =array('windows phone');
//wap    $_SERVER['HTTP_USER_AGENT']         
 static $wmlbrowser_list = array('cect', 'compal', 'ctl', 'lg', 'nec', 'tcl', 'alcatel', 'ericsson', 'bird', 'daxian', 'dbtel', 'eastcom',
   'pantech', 'dopod', 'philips', 'haier', 'konka', 'kejian', 'lenovo', 'benq', 'mot', 'soutec', 'nokia', 'sagem', 'sgh',
   'sed', 'capitel', 'panasonic', 'sonyericsson', 'sharp', 'amoi', 'panda', 'zte');
 $pad_list = array('pad', 'gt-p1000');
 $useragent = strtolower($_SERVER['HTTP_USER_AGENT']);
 if(dstrpos($useragent, $pad_list)) {
  return false;
 }
 if(($v = dstrpos($useragent, $mobilebrowser_list, true))){
  $_G['mobile'] = $v;
  return '1';
 }
 if(($v = dstrpos($useragent, $touchbrowser_list, true))){
  $_G['mobile'] = $v;
  return '2';
 }
 if(($v = dstrpos($useragent, $wmlbrowser_list))) {
  $_G['mobile'] = $v;
  return '3'; //wml 
 }
 $brower = array('mozilla', 'chrome', 'safari', 'opera', 'm3gate', 'winwap', 'openwave', 'myop');
 if(dstrpos($useragent, $brower)) return false;
 $_G['mobile'] = 'unknown';
//          ，  $_GET['mobile']             
 if(isset($_G['mobiletpl'][$_GET['mobile']])) {
  return true;
 } else {
  return false;
 }
}
/**
 *   $arr            $string 
 * @param  $string     $_SERVER['HTTP_USER_AGENT'] 
 * @param  $arr               $_SERVER['HTTP_USER_AGENT']          
 * @param  $returnvalue               ，true        ，false      【  】
 * @author           discuz3x
 * @lastmodify    2014-04-09
 */
function dstrpos($string, $arr, $returnvalue = false) {
 if(empty($string)) return false;
 foreach((array)$arr as $v) {
  if(strpos($string, $v) !== false) {
   $return = $returnvalue ? $v : true;
   return $return;
  }
 }
 return false;
}

<?php
function isMobile()
{ 
    //    HTTP_X_WAP_PROFILE        
    if (isset ($_SERVER['HTTP_X_WAP_PROFILE']))
    {
        return true;
    } 
    //   via    wap        ,           
    if (isset ($_SERVER['HTTP_VIA']))
    { 
        //     flase,   true
        return stristr($_SERVER['HTTP_VIA'], "wap") ? true : false;
    } 
    //    ，            ,       
    if (isset ($_SERVER['HTTP_USER_AGENT']))
    {
        $clientkeywords = array ('nokia',
            'sony',
            'ericsson',
            'mot',
            'samsung',
            'htc',
            'sgh',
            'lg',
            'sharp',
            'sie-',
            'philips',
            'panasonic',
            'alcatel',
            'lenovo',
            'iphone',
            'ipod',
            'blackberry',
            'meizu',
            'android',
            'netfront',
            'symbian',
            'ucweb',
            'windowsce',
            'palm',
            'operamini',
            'operamobi',
            'openwave',
            'nexusone',
            'cldc',
            'midp',
            'wap',
            'mobile'
            ); 
        //  HTTP_USER_AGENT            
        if (preg_match("/(" . implode('|', $clientkeywords) . ")/i", strtolower($_SERVER['HTTP_USER_AGENT'])))
        {
            return true;
        } 
    } 
    //    ，        ，      
    if (isset ($_SERVER['HTTP_ACCEPT']))
    { 
        //      wml     html        
        //     wml html  wml html        
        if ((strpos($_SERVER['HTTP_ACCEPT'], 'vnd.wap.wml') !== false) && (strpos($_SERVER['HTTP_ACCEPT'], 'text/html') === false || (strpos($_SERVER['HTTP_ACCEPT'], 'vnd.wap.wml') < strpos($_SERVER['HTTP_ACCEPT'], 'text/html'))))
        {
            return true;
        } 
    } 
    return false;
} 
?>

function is_mobile_request()  
{  
 $_SERVER['ALL_HTTP'] = isset($_SERVER['ALL_HTTP']) ? $_SERVER['ALL_HTTP'] : '';  
 $mobile_browser = '0';  
 if(preg_match('/(up.browser|up.link|mmp|symbian|smartphone|midp|wap|phone|iphone|ipad|ipod|android|xoom)/i', strtolower($_SERVER['HTTP_USER_AGENT'])))  
  $mobile_browser++;  
 if((isset($_SERVER['HTTP_ACCEPT'])) and (strpos(strtolower($_SERVER['HTTP_ACCEPT']),'application/vnd.wap.xhtml+xml') !== false))  
  $mobile_browser++;  
 if(isset($_SERVER['HTTP_X_WAP_PROFILE']))  
  $mobile_browser++;  
 if(isset($_SERVER['HTTP_PROFILE']))  
  $mobile_browser++;  
 $mobile_ua = strtolower(substr($_SERVER['HTTP_USER_AGENT'],0,4));  
 $mobile_agents = array(  
    'w3c ','acs-','alav','alca','amoi','audi','avan','benq','bird','blac',  
    'blaz','brew','cell','cldc','cmd-','dang','doco','eric','hipt','inno',  
    'ipaq','java','jigs','kddi','keji','leno','lg-c','lg-d','lg-g','lge-',  
    'maui','maxo','midp','mits','mmef','mobi','mot-','moto','mwbp','nec-',  
    'newt','noki','oper','palm','pana','pant','phil','play','port','prox',  
    'qwap','sage','sams','sany','sch-','sec-','send','seri','sgh-','shar',  
    'sie-','siem','smal','smar','sony','sph-','symb','t-mo','teli','tim-',  
    'tosh','tsm-','upg1','upsi','vk-v','voda','wap-','wapa','wapi','wapp',  
    'wapr','webc','winw','winw','xda','xda-'
    );  
 if(in_array($mobile_ua, $mobile_agents))  
  $mobile_browser++;  
 if(strpos(strtolower($_SERVER['ALL_HTTP']), 'operamini') !== false)  
  $mobile_browser++;  
 // Pre-final check to reset everything if the user is on Windows  
 if(strpos(strtolower($_SERVER['HTTP_USER_AGENT']), 'windows') !== false)  
  $mobile_browser=0;  
 // But WP7 is also Windows, with a slightly different characteristic  
 if(strpos(strtolower($_SERVER['HTTP_USER_AGENT']), 'windows phone') !== false)  
  $mobile_browser++;  
 if($mobile_browser>0)  
  return true;  
 else
  return false;