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Several methods for Apache http to automatically jump to https
Several methods for Apache http to automatically jump to https
当你的站点使用了HTTPS之后，你可能会想把所有的HTTP请求（即端口80的请求），全部都重定向至HTTPS。这时候你可以用以下的方式来做到：
在启用了 https 之后，还要保证之前的 http 端口可以打开，http 的 80 端口是有两个网址的，所以这就导致需要把原来的带 wwww 和不带 www 的域名同时指定一个 https 网址上面，需
要做两个 Apache 的301重定向，这个其实是很简单的，夏日博客的做法是直接在 .htaccess 文件中添加两个 301 即可，如下所示：
rewritecond %{http_host} ^www.php.cn [nc]
RewriteRule ^(.*)?$ https://www.php.cn/$1 [R=301,L]
RewriteCond %{SERVER_PORT} !^443$
RewriteRule ^(.*)?$ https://www.php.cn/$1 [R=301,L]
第一个 301 很自然就是带 www 的跳转到新的 https 上面了，而下面的301重定向则是判断如果端口不是80的话，则进行重定向，这样的话，带www和不带www的域名就一起跳转到 https 一个网址上面了，当然这种全站做301的方法是比较暴力的，通常情况下我们只要把主域名做个301就可以了，我这里是因为启用了原来的两个域名。
PHP中文网还手机了一些其它的 Apache http 跳转到 https 的方法，仅供参考：
方法1
RewriteEngine On
RewriteBase /
RewriteCond %{SERVER_PORT} 80
RewriteRule ^(.*)$ https://www.php.cn/$1 [R=301,L]方法二
RewriteEngine on
RewriteCond %{SERVER_PORT} !^443$
RewriteRule ^(.*)?$ https://%{SERVER_NAME}/$1 [R=301,L]#整站跳转
方法三
RewriteEngine on
RewriteBase /yourfolder
RewriteCond %{SERVER_PORT} !^443$
#RewriteRule ^(.*)?$ https://%{SERVER_NAME}/$1 [R=301,L]
RewriteRule ^.*$ https://%{SERVER_NAME}%{REQUEST_URI} [R=301,L]#以上至针对某个目录跳转， yourfolder就是目录名
方法4
redirect 301 /你的网页 https://你的主机+网页
#至针对某个网页跳转
方法5
RewriteEngine on
RewriteCond %{SERVER_PORT} !^443$
RewriteCond %{REQUEST_URI} !^/tz.php
RewriteRule (.*) https://%{SERVER_NAME}/$1 [R]解释：
%{SERVER_PORT} —— 访问端口
%{REQUEST_URI} —— 比如如果url是 http: //localhost/tz.php，则是指 /tz.php
%{SERVER_NAME} —— 比如如果url是 http: //localhost/tz.php，则是指 localhost
以上规则的意思是，如果访问的url的端口不是443，且访问页面不是tz.php，则应用RewriteRule这条规则。
这样便实现了：访问了 http: //localhost/index.php 或者 http: //localhost/admin/index.php 等页面的时候会自动跳转到 https: //localhost/index.php 或者 https: //localhost/admin/index.php，但是访问 http: //localhost/tz.php 的时候就不会做任何跳转，也就是说 http: //localhost/tz.php 和 https: //localhost/tz.php 两个地址都可以访问
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