htaccess get one parameter or two depending of the url PHP - php

Question

First of all: If you have a better title for this question let me know.
Hello , I have a site which loads content using get variable.
Let me explain it to you.
My index php file:
<?php
#check if get parameter page exists
#check if file exists
require $_GET['page] . '.php'; //if it exists require its content
?>
In that way users may go to my site and write urls like these ones below:
http://localhost/loremipsum?page=home
http://localhost/loremipsum?page=help
But to get a cleaner url I edited my .htaccess file to get urls like these ones:
http://localhost/loremipsum/home
http://localhost/loremipsum/help
The .htaccess:
RewriteEngine On
RewriteBase /
RewriteCond %{REQUEST_FILENAME} !-f
RewriteCond %{REQUEST_FILENAME} !-d
RewriteRule ^(.*) /loremipsum/?pg=$1 [L]
But I got to a point where I need other parameters, For the next url I would like to have userpreferences as the page parameter and something as the fav parameter
A url like this would work:
http://localhost/loremipsum/userpreferences&fav=something
But the goal is to get a url like this:
http://localhost/loremipsum/userpreferences/something
The problem is that nothing that I have tried have worked, This is what I thought it should work but it didn't:
RewriteRule ^(.*)/userpreferences/(a-zA-Z0-9)+ /loremipsum/?pg=$1&fav=$2 [L]
UPDATE:
I know this rule should be applied only if page parameter is equal to userpreferences and I was thinking about doing
RewriteRule ^userpreferences/(a-zA-Z0-9)+ /loremipsum/?pg=userpreferences&fav=$1 [L]
But it won't work, it seems as userpreferences would not be a string and I get a server error.

Answer 1

You can make a rewrite rule like so:
RewriteRule ^(.*)$ index.php?parameter=$1 [NC]
and then you get :
index.php?parameter=param/value/param/value
From the Browser you get :
http://localhost/parameter/param/value/param/value
Inside PHP file you could access your parameter:
<?php
$parameter = explode( "/", $_GET['parameter'] );
for($i = 0; $i < count($parameter); $i+=2) {
echo $parameter[$i] ." has value: ". $parameter[$i+1] ."<br />";
}
?>