.htaccessによく書くこと

www無し(https)

RewriteEngine on
RewriteCond %{HTTP_HOST} ^www\.(.*)$ [NC]
RewriteRule ^(.*)$ https://%1/$1 [R=301,L]

www有り(https)

RewriteEngine on
RewriteCond %{HTTP_HOST} !^www\.
RewriteRule ^(.*)$ https://www.%{HTTP_HOST}/$1 [R=301,L]

httpからhttpsへ

RewriteEngine on
RewriteCond %{HTTPS} off
RewriteRule ^(.*)$ https://%{HTTP_HOST}%{REQUEST_URI} [R,L]

index表示無し

RewriteEngine on
RewriteCond %{THE_REQUEST} ^.*/index.(html|php)
RewriteRule ^(.*)index.(html|php)$ https://%{HTTP_HOST}/$1 [R=301,L]

php と html の優先順位
同じファイル名がある時、phpを優先する場合の書き方。

DirectoryIndex index.php index.html

まとめて書くと RewriteEngine on は一度で良い。

RewriteEngine on

# www無し(https)
RewriteCond %{HTTP_HOST} ^www\.(.*)$ [NC]
RewriteRule ^(.*)$ https://%1/$1 [R=301,L]


# httpからhttpsへ
RewriteCond %{HTTPS} off
RewriteRule ^(.*)$ https://%{HTTP_HOST}%{REQUEST_URI} [R,L]


# index表示無し
RewriteCond %{THE_REQUEST} ^.*/index.(html|php)
RewriteRule ^(.*)index.(html|php)$ https://%{HTTP_HOST}/$1 [R=301,L]