PHP验证终端类型是否为手机的简单实例

实例如下：

/**
 * 判断当前访问的用户是 pc端 还是 手机端 返回true 为手机端 false 为pc 端
 * @return boolean
 */
function ismobile(){ 
  $useragent=isset($_server['http_user_agent']) ? $_server['http_user_agent'] : ''; 
  //echo $useragent;die;
  $useragent_commentsblock=preg_match('|\(.*?\)|',$useragent,$matches)>0?$matches[0]:'';    
  function checksubstrs($substrs,$text){ 
    foreach($substrs as $substr) 
      if(false!==strpos($text,$substr)){ 
        return true; 
      } 
      return false; 
  }
  $mobile_os_list=array('google wireless transcoder','windows ce','windowsce','symbian','android','armv6l','armv5','mobile','centos','mowser','avantgo','opera mobi','j2me/midp','smartphone','go.web','palm','ipaq');
  $mobile_token_list=array('profile/midp','configuration/cldc-','160×160','176×220','240×240','240×320','320×240','up.browser','up.link','symbianos','palmos','pocketpc','sonyericsson','nokia','blackberry','vodafone','benq','novarra-vision','iris','netfront','htc_','xda_','samsung-sgh','wapaka','docomo','iphone','ipod'); 

  $found_mobile=checksubstrs($mobile_os_list,$useragent_commentsblock) || 
       checksubstrs($mobile_token_list,$useragent); 

  if ($found_mobile){ 
    return true; 
  }else{ 
    return false; 
  } 
}

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