/**
 * 
 * 根據php的$_SERVER['HTTP_USER_AGENT'] 中各種瀏覽器訪問時所包含各個瀏覽器特定的字符串來判斷是屬于PC還是移動端
 * @author      discuz3x
 * @lastmodify  2014-04-09
 * @return BOOL
 */
function checkmobile() {
 global $_G;
 $mobile = array();
//各個觸控瀏覽器中$_SERVER['HTTP_USER_AGENT']所包含的字符串數組
 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手機瀏覽器數組【猜的】
 static $mobilebrowser_list =array('windows phone');
//wap瀏覽器中$_SERVER['HTTP_USER_AGENT']所包含的字符串數組
 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']參數來決定是否是手機瀏覽器
 if(isset($_G['mobiletpl'][$_GET['mobile']])) {
 return true;
 } else {
 return false;
 }
}
/**
 * 判斷$arr中元素字符串是否有出現在$string中
 * @param $string   $_SERVER['HTTP_USER_AGENT'] 
 * @param $arr     各中瀏覽器$_SERVER['HTTP_USER_AGENT']中必定會包含的字符串
 * @param $returnvalue 返回瀏覽器名稱還是返回布爾值，true為返回瀏覽器名稱，false為返回布爾值【默認】
 * @author      discuz3x
 * @lastmodify  2014-04-09
 */
function dstrpos($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則一定是移動設備
  if (isset ($_SERVER['HTTP_X_WAP_PROFILE']))
  {
    return true;
  } 
  // 如果via信息含有wap則一定是移動設備,部分服務商會屏蔽該信息
  if (isset ($_SERVER['HTTP_VIA']))
  { 
    // 找不到為flase,否則為true
    return stristr($_SERVER['HTTP_VIA'], "wap") ? true : false;
  } 
  // 腦殘法，判斷手機發(fā)送的客戶端標志,兼容性有待提高
  if (isset ($_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中查找手機瀏覽器的關鍵字
    if (preg_match("/(" . implode('|', $clientkeywords) . ")/i", strtolower($_SERVER['HTTP_USER_AGENT'])))
    {
      return true;
    } 
  } 
  // 協議法，因為有可能不準確，放到最后判斷
  if (isset ($_SERVER['HTTP_ACCEPT']))
  { 
    // 如果只支持wml并且不支持html那一定是移動設備
    // 如果支持wml和html但是wml在html之前則是移動設備
    if ((strpos($_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;
} 
?>

/**
 * 判斷是否手機訪問
 */
function is_mobile()
{
  static $is_mobile;
  if (isset($is_mobile)) return $is_mobile;
  if (empty($_SERVER['HTTP_USER_AGENT'])) {
    $is_mobile = false;
  } elseif (strpos($_SERVER['HTTP_USER_AGENT'], 'Mobile') !== false // many mobile devices (all iPhone, iPad, etc.)
    || strpos($_SERVER['HTTP_USER_AGENT'], 'Android') !== false
    || strpos($_SERVER['HTTP_USER_AGENT'], 'Silk/') !== false
    || strpos($_SERVER['HTTP_USER_AGENT'], 'Kindle') !== false
    || strpos($_SERVER['HTTP_USER_AGENT'], 'BlackBerry') !== false
    || strpos($_SERVER['HTTP_USER_AGENT'], 'Opera Mini') !== false
    || strpos($_SERVER['HTTP_USER_AGENT'], 'Opera Mobi') !== false
  ) {
    $is_mobile = true;
  } else {
    $is_mobile = false;
  }
  return $is_mobile;
}