Question about htaccess regular expressions?

Question

Regular Expressions

Hello,
You need to make a redirect for categories, for example:
https://mysite.ru/123-catsto https://mysite.ru/shop/cats
and from the product page, for example:
https://mysite.ru/cats/834-whiskas.htmlto https://mysite.ru/product/whiskas
Tell me what the RewriteRule will look like for these two rules

Answer 1

At
you have a cyclic redirect, because /product/$1 matches regex ^/.*/([0-9]-.*\.html)$
you need to make stricter rules..

RewriteCond %{REQUEST_URI} !^/product [NC]  # если не начинается с /product
RewriteRule ^/.*/([0-9]-.*\.html)$ /product/$1 [R=301,L]