How to remove parts of a URL using .htaccess

Question

I have some problem with RewriteRule. I'm moving old shop to new one and path to some products will be changed. The old path to one single product is:

www.example.com/page/product1.html
www.example.com/page/sub-page/product1.html

Every single product (in new shop) can be found on that path:

www.example.com/product1.html

And it is the best and (in my opinion) the easiest way to redirect all the products. How to cut the part of previous links? My rule looks like this:

RewriteRule ^page/(.*)$ /$1 [R=301,L]
RewriteRule ^page/sub-page/(.*)$ /$1 [R=301,L]

but every time when I enter to the page using old path www.example.com/page/sub-page/product1.html the link after redirect looks like that: www.example.com/sub-page/product1.html and should www.example.com/product1.html

Answer 1

Change order of your rules like this:

RewriteRule ^page/sub-page/(.+)$ /$1 [R=301,L]

RewriteRule ^page/(.+)$ /$1 [R=301,L]

EDIT: Or combine it a single rule:

RewriteRule ^page/(?:.+?/)?([^/]+)$ /$1 [R=301,L]

Answer 2

You have to switch positions of your rules like this:

RewriteRule ^page/sub-page/(.*)$ /$1 [R=301,L]
RewriteRule ^page/(.*)$ /$1 [R=301,L]

The rewrite module just goes down your list of rules and tries to apply the rule one by one. Your first rule would match both.