获取用户登录的设备类型 系统+版本号

function equipmentSystem(){

    $agent = isset($_SERVER["HTTP_USER_AGENT"]) ? $_SERVER["HTTP_USER_AGENT"] : "";
    if(stristr($agent,"iPad")) {
        $fb_fs = "iPad";
    }else if(preg_match("/Android (([0-9_.]{1,3})+)/i",$agent,$version)) {
        $fb_fs = "手机(Android ".$version[1].")";
    }else if(stristr($agent,"Linux")){
        $fb_fs = "电脑(Linux)";
    }else if(preg_match("/iPhone OS (([0-9_.]{1,3})+)/i",$agent,$version)){
        $fb_fs = "手机(iPhone ".$version[1].")";
    }else if(preg_match("/Mac OS X (([0-9_.]{1,5})+)/i",$agent,$version)){
        $fb_fs = "电脑(OS X ".$version[1].")";
    }else if(preg_match("/unix/i",$agent)){
        $fb_fs = "Unix";
    }else if(preg_match("/windows/i",$agent)){
        $fb_fs = "电脑(Windows)";
    }else{
        $fb_fs = "未知(Unknown)";
    }
    return $fb_fs;
}