In accordance with the SEO guidelines I am changing pages url from
website.com/color_red/ (underscore) to
website.com/color-red/ (dash / hyphen)
/color-red/ must simply produce ?c=red
In .htaccess this works perfectly with underscore:
RewriteRule ^color_([^/\.]+)/?$ ?c=$1 [L]
not with dash:
RewriteRule ^color-([^/\.]+)/?$ ?c=$1 [L]
I think dash char must be escaped but I don't know how.
Could you please try following. Please make sure to clear your browser cache before testing your URLs.
1st solution: To handle both _ OR - in your URLs then try following.
RewriteEngine ON
RewriteRule ^color[_-]([^/]*)/?$ ?c=$1 [L]
2nd solution: In case you only want to handle - in your URLs then try following.
RewriteEngine ON
RewriteRule ^color-([^/]*)/?$ ?c=$1 [L]
A simple solution is to escape the hypen/dash char - with square brackets [-] :
RewriteRule ^color[-]([^/\.]+)/?$ ?c=$1 [L]