如何判断是手机浏览还是电脑浏览

function isMobile() {<br />  if(isset($_SERVER['HTTP_X_WAP_PROFILE'])){<br />    return TRUE;<br />  }<br /><br />  if(isset($_SERVER['HTTP_VIA']) && stristr($_SERVER['HTTP_VIA'], "wap")){<br />    return TRUE;<br />  }<br /><br />  if(isset($_SERVER['HTTP_USER_AGENT'])){<br />    $clientkeywords = array('nokia', 'sony', 'ericsson', 'mot', 'samsung', 'htc', 'sgh', 'lg', 'sharp', 'sie-',<br />      'philips', 'panasonic', 'alcatel', 'lenovo', 'iphone', 'ipod', 'blackberry', 'meizu', 'android', 'netfront', 'symbian',<br />      'ucweb', 'windowsce', 'palm', 'operamini', 'operamobi', 'openwave', 'nexusone', 'cldc', 'midp', 'wap', 'mobile');<br />    if(preg_match("/(" . implode('<br><font color='#FF8000'>------解决方案--------------------</font><br>', $clientkeywords) . ")/i", strtolower($_SERVER['HTTP_USER_AGENT']))){<br />      return TRUE;<br />    }<br />  }<br /><br />  if(isset($_SERVER['HTTP_ACCEPT'])){<br />    if((strpos($_SERVER['HTTP_ACCEPT'], 'vnd.wap.wml') !== false)<br />          && (strpos($_SERVER['HTTP_ACCEPT'], 'text/html') === false<br />              <br><font color='#FF8000'>------解决方案--------------------</font><br> (strpos($_SERVER['HTTP_ACCEPT'], 'vnd.wap.wml') < strpos($_SERVER['HTTP_ACCEPT'], 'text/html')))){<br />      return TRUE;<br />    }<br />  }<br /><br />  return FALSE;<br />}