这种提升seo权重的方法有用么

[!md]
吾爱上看到的，原理是：判断如果是蜘蛛，就301跳转到权重高的站点。有用么，感觉不行呀！

怎么看怎么不靠谱啊！！

php源码：

<?php
/*
*作者：68喜科技
*/
error_reporting(E_ALL^E_NOTICE^E_WARNING);
$xieyi="http://";
function checkrobot($useragent=''){
        static $kw_spiders = array('bot', 'crawl', 'spider' ,'slurp', 'sohu-search', 'lycos', 'robozilla');
        static $kw_browsers = array('msie', 'netscape', 'opera', 'konqueror', 'mozilla');
  
        $useragent = strtolower(empty($useragent) ? $_SERVER['HTTP_USER_AGENT'] : $useragent);
        if(strpos($useragent, 'http://') === false && dstrpos($useragent, $kw_browsers)) return false;
        if(dstrpos($useragent, $kw_spiders)) return true;
        return false;
}
function dstrpos($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;
}
//网址随机输出，可以填写多个随机输出转移权重的网址
$url[0] = "http://demoo1.com";
$url[1] = "http://demoo2.com";
$url[2] = "http://demoo3.com";
$url[3] = "http://demoo4.com";
$url[4] = "http://demoo5.com";
$url[5] = "http://demoo5.com";
srand ((double)microtime()*1000000);
$randomnum = rand(0, count($url)-1);
if(checkrobot()){
    Header("Location:$url[$randomnum]"); 
                header('HTTP/1.1 301 Moved Permanently');
                header("Location:$url[$randomnum]");    
                exit;
}
//判断的是百度，如果是百度点击进去就不跳转，防止被发现
if(stristr ($_SERVER['HTTP_REFERER'],"baidu.com"))
{         
            $file = file_get_contents( $xieyi.$_SERVER['HTTP_HOST'].$_SERVER['REQUEST_URI']);          
                echo $file;
                exit;
    exit;      
 }
?>

红米Note7 高配版(黑色)