[PHP][ASP][.Net][JSP] 301,302,Meta轉址
常用的轉址方式有三種: 301 redirect, 302 rediretc 以及 meta fresh.
301 redirect:
301代表永久轉址(permanently moved),這是對SEO最安全的轉址方式,只要不是暫時搬移的情況,都建議使用301來做轉址.
[.htaccess作法]
網頁轉址
RedirectPermanent /old-file-name.html http: //www.new-domain.com/new-directory/new-file-name.html
目錄轉址
RedirectPermanent /old-directory http: //www.new-domain.com/new-directory/
全站轉址
RedirectPermanent / http: //www.new-domain.com/
[PHP]
[ASP]
<%
Response.Status="301 Moved Permanently"
Response.AddHeader "Location","http://www.jb51.net/"
Response.End
%>
[.Net]
<%@ Page Language="C#" %>
[JSP]
<%@ page language="java" pageEncoding="GBK"%>
<%
response.setStatus(response.SC_MOVED_PERMANENTLY);
response.addHeader("Location","http://www.7hinet.com");
%>
302 redirect:
302代表暫時轉址(temporary),容易被搜尋引擎容易誤判為spam而遭到懲罰.建議不要使用.
[htaccess作法:]
網頁轉址
Redirect /file-name.html http: //www.domain.com/temporary-directory/temporary-file-name.html
目錄轉址
Redirect /directory http: //www.domain.com/temporary-directory/
全站轉址
Redirect / http: //www.temporary-domain.com/
meta fresh:
藉由網頁中的meta指令,於特定時間後重新導向到新的網頁,如果延遲的時間太短(約3秒之內),會被判斷為spam,若必須採用meta fresh的方式時,請勿將延遲時間設定太短.
<META HTTP-EQUIV=refresh" CONTENT="停留的秒數;URL=要轉的URL">