さくら：WP：独自SSL：www付滋賀県守山市のホームページ制作

htaccess

<IfModule mod_rewrite.c>
RewriteEngine On
RewriteCond %{HTTP:X-Sakura-Forwarded-For} ^$
RewriteRule ^(.*)$ https://www.ドメイン/$1 [R=301,L]
</IfModule>

wp-config.php

if( isset($_SERVER['HTTP_X_SAKURA_FORWARDED_FOR']) ) {
    $_SERVER['HTTPS'] = 'on';
    $_ENV['HTTPS'] = 'on';
}