such as:
what if the source 1.m87.cn jumps to 2.m87.cn
if the source jx.mh87.cn jumps to jx.mh87.cn/vip
?
for example, when the caohangyuan.com spider engine comes, there must be a source, so this source is not operated when it belongs to the spider. Just give it what I want to show him. If the user does not show the content to the user, jump directly to the new page.
if it is PHP, you can use $_ SERVER ['HTTP_REFERER'] to determine the source. If it is JavaScript, you can use document.referrer to determine the source.
take the unfinished answer from the one above, and jump to
php:
$url = "www.baidu.com";
header("Location:{$url}");html itself cannot identify the access source. You can use js or php to redirect
var ref = document.referrer;
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