About domain name redirection to another index.html

Is the domain name redirected to another index.html? Tips: you can write all the content at the beginning and end of the page. how can you make some changes? It is better to have a root directory, which can be freely related to domain name redirection to another index.html question?
Tips: you can write all the content at the beginning and end of the page. how can you make some changes? It is better to have a root directory. you can add pages as needed.
If you know how to modify it, you can also perform domain name redirection. The index page of the PHP domain name template homepage is shared:
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Go to Baidu "apache pseudo-static" or "nginx pseudo-static"
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You mean to separate html from php. you can find a template engine.
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Perform a pseudo-static direct location to index.html