/**
 * 
 * 根據(jù)php的$_SERVER['HTTP_USER_AGENT'] 中各種瀏覽器訪問時(shí)所包含各個(gè)瀏覽器特定的字符串來判斷是屬于PC還是移動(dòng)端
 * @author           discuz3x
 * @lastmodify    2014-04-09
 * @return  BOOL
 */
function checkmobile() {
 global $_G;
 $mobile = array();
//各個(gè)觸控瀏覽器中$_SERVER['HTTP_USER_AGENT']所包含的字符串?dāng)?shù)組
 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手機(jī)瀏覽器數(shù)組【猜的】
 static $mobilebrowser_list =array('windows phone');
//wap瀏覽器中$_SERVER['HTTP_USER_AGENT']所包含的字符串?dāng)?shù)組
 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版
 }
 $brower = array('mozilla', 'chrome', 'safari', 'opera', 'm3gate', 'winwap', 'openwave', 'myop');
 if(dstrpos($useragent, $brower)) return false;
 $_G['mobile'] = 'unknown';
//對于未知類型的瀏覽器，通過$_GET['mobile']參數(shù)來決定是否是手機(jī)瀏覽器
 if(isset($_G['mobiletpl'][$_GET['mobile']])) {
  return true;
 } else {
  return false;
 }
}
/**
 * 判斷$arr中元素字符串是否有出現(xiàn)在$string中
 * @param  $string     $_SERVER['HTTP_USER_AGENT'] 
 * @param  $arr          各中瀏覽器$_SERVER['HTTP_USER_AGENT']中必定會(huì)包含的字符串
 * @param  $returnvalue 返回瀏覽器名稱還是返回布爾值，true為返回瀏覽器名稱，false為返回布爾值【默認(rèn)】
 * @author           discuz3x
 * @lastmodify    2014-04-09
 */
function dstrpos($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()
{ 
    // 如果有HTTP_X_WAP_PROFILE則一定是移動(dòng)設(shè)備
    if (isset ($_SERVER['HTTP_X_WAP_PROFILE']))
    {
        return true;
    } 
    // 如果via信息含有wap則一定是移動(dòng)設(shè)備,部分服務(wù)商會(huì)屏蔽該信息
    if (isset ($_SERVER['HTTP_VIA']))
    { 
        // 找不到為flase,否則為true
        return stristr($_SERVER['HTTP_VIA'], "wap") ? true : false;
    } 
    // 腦殘法，判斷手機(jī)發(fā)送的客戶端標(biāo)志,兼容性有待提高
    if (isset ($_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'
            ); 
        // 從HTTP_USER_AGENT中查找手機(jī)瀏覽器的關(guān)鍵字
        if (preg_match("/(" . implode('|', $clientkeywords) . ")/i", strtolower($_SERVER['HTTP_USER_AGENT'])))
        {
            return true;
        } 
    } 
    // 協(xié)議法，因?yàn)橛锌赡懿粶?zhǔn)確，放到最后判斷
    if (isset ($_SERVER['HTTP_ACCEPT']))
    { 
        // 如果只支持wml并且不支持html那一定是移動(dòng)設(shè)備
        // 如果支持wml和html但是wml在html之前則是移動(dòng)設(shè)備
        if ((strpos($_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;
} 
?>