通过.htaccess重定向旧格式URL以避免404错误

我将网站的永久链接（permalink）从/index.php/year/month/postName格式修改为/postName格式后，大量外部旧链接访问时出现404错误。

想通过.htaccess将/index.php/year/month/postName的请求重定向到/postName以避免流量流失，但尝试以下代码后问题仍未解决：

RedirectMatch 301 ^/index\.php/([0-9]+)/([0-9]+)/(.*)$ https://www.example.com/$3

替换成$4也无效。

我的.htaccess完整代码如下：

RewriteEngine On
AcceptPathInfo On
RewriteRule ^index\.php/\d{4}/\d\d/([^/]*) https://www.example.com/$1 [R=301,L]

<IfModule mod_rewrite.c>
RewriteEngine On
RewriteRule .* - [E=HTTP_AUTHORIZATION:%{HTTP:Authorization}]
RewriteBase /
RewriteRule ^index\.php$ - [L]
RewriteCond %{REQUEST_FILENAME} !-f
RewriteCond %{REQUEST_FILENAME} !-d
RewriteRule . /index.php [L]
</IfModule>
# BEGIN WpFastestCache
<IfModule mod_rewrite.c>
RewriteEngine On
RewriteBase /
RewriteCond %{HTTP_HOST} ^example.com
RewriteRule ^(.*)$ http\:\/\/www\.example\.com\/$1 [R=301,L]
# Start WPFC Exclude
# End WPFC Exclude
# Start_WPFC_Exclude_Admin_Cookie
RewriteCond %{HTTP:Cookie} !wordpress_logged_in_[^\=]+\=El\sCorregidor|hystoriador
# End_WPFC_Exclude_Admin_Cookie
RewriteCond %{HTTP_HOST} ^www.example.com
RewriteCond %{HTTP_USER_AGENT} !(facebookexternalhit|WhatsApp|Mediatoolkitbot)
RewriteCond %{HTTP_USER_AGENT} !(WP\sFastest\sCache\sPreload(\siPhone\sMobile)?\s*Bot)
RewriteCond %{REQUEST_METHOD} !POST
RewriteCond %{HTTPS} !=on
RewriteCond %{REQUEST_URI} !(\/){2}$
RewriteCond %{REQUEST_URI} \/$
RewriteCond %{QUERY_STRING} !.+
RewriteCond %{HTTP:Cookie} !comment_author_
RewriteCond %{HTTP:Cookie} !woocommerce_items_in_cart
RewriteCond %{HTTP:Cookie} !safirmobilswitcher=mobil
RewriteCond %{HTTP:Profile} !^[a-z0-9\"]+ [NC]
RewriteCond %{DOCUMENT_ROOT}/wp-content/cache/all/$1/index.html -f [or]
RewriteCond /var/www/vhosts/example.com/httpdocs/wp-content/cache/all/$1/index.html -f
RewriteRule ^(.*) "/wp-content/cache/all/$1/index.html" [L]
</IfModule>
<FilesMatch "index\.(html|htm)$">
AddDefaultCharset UTF-8
<ifModule mod_headers.c>
FileETag None
Header unset ETag
Header set Cache-Control "max-age=0, no-cache, no-store, must-revalidate"
Header set Pragma "no-cache"
Header set Expires "Mon, 29 Oct 1923 20:30:00 GMT"
</ifModule>
</FilesMatch>

# BEGIN W3TC Page Cache core
<IfModule mod_rewrite.c>
    RewriteEngine On
    RewriteBase /
    RewriteCond %{HTTP:Accept-Encoding} gzip
    RewriteRule .* - [E=W3TC_ENC:_gzip]
    RewriteCond %{HTTP_COOKIE} w3tc_preview [NC]
    RewriteRule .* - [E=W3TC_PREVIEW:_preview]
    RewriteCond %{REQUEST_METHOD} !=POST
    RewriteCond %{QUERY_STRING} =""
    RewriteCond %{REQUEST_URI} \/$
    RewriteCond %{HTTP_COOKIE} !(comment_author|wp\-postpass|w3tc_logged_out|wordpress_logged_in|wptouch_switch_toggle) [NC]
    RewriteCond "%{DOCUMENT_ROOT}/wp-content/cache/page_enhanced/%{HTTP_HOST}/%{REQUEST_URI}/_index%{ENV:W3TC_PREVIEW}.html%{ENV:W3TC_ENC}" -f
    RewriteRule .* "/wp-content/cache/page_enhanced/%{HTTP_HOST}/%{REQUEST_URI}/_index%{ENV:W3TC_PREVIEW}.html%{ENV:W3TC_ENC}" [L]
</IfModule>
# END W3TC Page Cache core
# BEGIN GZIP
<ifmodule mod_deflate.c>
AddOutputFilterByType DEFLATE text/text text/html text/plain text/xml text/css application/x-javascript application/javascript
</ifmodule>
# END GZIP
# Con especificamos cache
<IfModule mod_expires.c>
ExpiresActive On
ExpiresDefault "access plus 10 days"
ExpiresByType text/css "access plus 1 week"
ExpiresByType text/plain "access plus 1 week"
ExpiresByType image/gif "access plus 1 month"
ExpiresByType image/png "access plus 1 month"
ExpiresByType image/jpeg "access plus 1 month"
ExpiresByType image/x-icon "access plus 3 months"
ExpiresByType application/x-javascript "access plus 1 month"
ExpiresByType application/javascript "access plus 1 week"
ExpiresByType text/javascript "access plus 1 week"
ExpiresByType application/x-icon "access plus 3 months"
</IfModule>
# FIN
Options +FollowSymLinks

你的重定向规则无效的核心原因是规则位置错误，请求被后续的WordPress核心规则或缓存规则优先处理，轮不到重定向生效。另外RedirectMatch与mod_rewrite规则混用容易出现优先级冲突，建议统一使用mod_rewrite规则。

具体修改步骤 #

1. 删除你当前写的RewriteRule ^index\.php/\d{4}/\d\d/([^/]*) https://www.example.com/$1 [R=301,L]以及之前尝试的RedirectMatch代码。
2. 在.htaccess文件的最顶部添加以下规则：

RewriteEngine On
RewriteRule ^index\.php/\d{4}/\d{1,2}/([^/]+)$ /$1 [R=301,L,NC]

规则说明 #

• ^index\.php/\d{4}/\d{1,2}/：精准匹配开头为/index.php/+4位年份+1-2位月份的路径
• ([^/]+)：捕获postName部分（直到下一个斜杠为止，避免匹配多余内容）
• /$1：用相对路径重定向到新的永久链接，避免硬编码域名，方便后续维护
• [R=301,L,NC]：R=301表示永久重定向（对SEO友好），L表示执行完这条规则后停止后续规则处理，NC表示不区分大小写

测试注意事项 #

• 测试前务必清除浏览器缓存，因为301重定向会被浏览器缓存，旧缓存会影响测试结果
• 如果你的postName包含斜杠（特殊情况），可把([^/]+)替换为(.*)，但要注意避免和其他路径冲突
• 确认服务器已开启mod_rewrite模块（WordPress环境通常默认开启）

内容的提问来源于stack exchange，提问作者damargon