Add this to your .htaccess in your web root / directory
RewriteEngine on
RewriteBase /
RewriteRule ^home$ index.php?page=home&%{QUERY_STRING} [NC,L]
If you want this to work for all pages i.e. /any-page gets served as index.php?page=any-page then use
RewriteEngine on
RewriteBase /
RewriteCond %{REQUEST_FILENAME} !-d # not a dir
RewriteCond %{REQUEST_FILENAME} !-f # not a file
RewriteRule ^(.*)$ index.php?page=$1&%{QUERY_STRING} [NC,L]
How do these rules work?
A RewriteRule has the following syntax
RewriteRule [Pattern] [Substitution] [Flags]
The Pattern can use a regular expression and is matched against the part of the URL after the hostname and port (with the .htaccess placed in the root dir), but before any query string.
First Rule
The pattern ^home$ makes the first rule match the incoming URL www.website.com/home. The %{QUERY_STRING} simply captures and appends anything after /home? to the internally substituted URL index.php?page=home.
The flag NC simply makes the rule non case-sensitive, so that it matches /Home or /HOME as well. And L simply marks it as last i.e. rewriting should stop here in case there are any other rules defined below.
Second Rule
This one's just more generic i.e. if all of your site pages follow this URL pattern then instead of writing several rules, one for each page, we could just use this generic one.
The .* in the pattern ^(.*)$ matches /any-page-name and the parentheses help capture the any-page-name part as a $1 variable used in the substitution URL as index.php?page=$1. The & in page=home& and page=$1& is simply the separator used between multiple query string field-value pairs.
Finally, the %{QUERY_STRING} and the [NC,L] flags work the same as in rule one.
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