如何使用htaccess更改域名

Question

我有两个域

1. learnhowto.com
2. lht.com

当用户访问 lht.com/er45c 时，它应自动重定向到 learnhowto.com/er45c 我该如何使用.htaccess

我当前的htaccess是

<IfModule mod_rewrite.c>
    <IfModule mod_negotiation.c>
        Options -MultiViews -Indexes
    </IfModule>

    RewriteEngine On

    RewriteCond %{HTTP_HOST} ^lht.com/$ [OR]
    RewriteCond %{HTTP_HOST} ^www.lht.com/$
    RewriteRule ^(.*)$ https://learnhowto.com/$1 [R=301,L]

    # Handle Authorization Header
    RewriteCond %{HTTP:Authorization} .
    RewriteRule .* - [E=HTTP_AUTHORIZATION:%{HTTP:Authorization}]

    # Redirect Trailing Slashes If Not A Folder...
    RewriteCond %{REQUEST_FILENAME} !-d
    RewriteCond %{REQUEST_URI} (.+)/$
    RewriteRule ^ %1 [L,R=301]

    # Handle Front Controller...
    RewriteCond %{REQUEST_FILENAME} !-d
    RewriteCond %{REQUEST_FILENAME} !-f
    RewriteRule ^ index.php [L]

</IfModule>