判断用户设备类型

根据$_SERVER['HTTP_USER_AGENT']判断用户设备类型

public function AndroidOrIOS(){
    //dump($_SERVER);
    $useragent=strtolower($_SERVER['HTTP_USER_AGENT']);
    $type='';
    if(strpos($useragent,'android')){
    　　$type='android';
    }
    if(strpos($useragent,'iphone')||strpos($useragent,'ipad')){
    　　$type='ios';
    }
    if(strpos($useragent,'win64')||strpos($useragent,'win32')){
    　　$type='windows';
    }
    echo $type;
}