Mod_rewrite code for use in .htaccess file:
# Enable mod_rewrite, start rewrite engine
Options +FollowSymLinks
RewriteEngine on
#
# Internally rewrite search engine friendly static URL to dynamic filepath and query
RewriteRule ^product/([^/]+)/([^/]+)/([^/]+)/([^/]+)/([^/]+)/?$ /index.php?product=$1&color=$2&size=$3&texture=$4&m aker=$5 [L]
#
# Externally redirect client requests for old dynamic URLs to equivalent new static URLs
RewriteCond %{THE_REQUEST} ^[A-Z]{3,9}\ /index\.php\?product=([^&]+)&color=([^&]+)&size=([^&]+)&texture=([^&]+)&maker=([^\ ]+)\ HTTP/
RewriteRule ^index\.php$
http://example.com/product/%1/%2/%3/%4/%5? [R=301,L]
Note that the keyword "product" always appears in both the static and dynamic forms. This is intended to make it simple for mod_rewrite to detect requests where the above rules need to be applied. Other methods, such as tesing for file-exists are also possible, but less efficient and more prone to errors compared to this approach.