SEO not working for products with a large number of options [Solved]

We are an online eyewear seller, specialising on 3D and 2D glasses. I use SEO on my website, which works fine on the categories and many of our products. However, on some of our products, which have many options, it does not. For example, https://optics3d.co.uk/index.php?route= ... uct_id=186 should be https://optics3d.co.uk/RxMono3D/Prescri ... o3D-Linear. This product has 39 options. On the product setup page in admin, I have tried entering the desired unique SEO and website says that the changes are saved, but they are not. I had already edited the .htaccess file to allow more options. This is as follows:

# 1.To use URL Alias you need to be running apache with mod_rewrite enabled.

# 2. In your opencart directory rename htaccess.txt to .htaccess.

# For any support issues please visit: http://www.opencart.com

Options +FollowSymlinks

# Prevent Directory listing
Options -Indexes

# Prevent Direct Access to files
<FilesMatch "(?i)((\.tpl|.twig|\.ini|\.log|(?<!robots)\.txt))">
# Require all denied
## For apache 2.2 and older, replace "Require all denied" with these two lines :
Order deny,allow
Deny from all
</FilesMatch>

# SEO URL Settings
RewriteEngine On
# If your opencart installation does not run on the main web folder make sure you folder it does run in ie. / becomes /shop/

RewriteBase /
RewriteRule ^sitemap.xml$ index.php?route=extension/feed/google_sitemap [L]
RewriteRule ^googlebase.xml$ index.php?route=extension/feed/google_base [L]
RewriteRule ^system/storage/(.*) index.php?route=error/not_found [L]
RewriteCond %{REQUEST_FILENAME} !-f
RewriteCond %{REQUEST_FILENAME} !-d
RewriteCond %{REQUEST_URI} !.*\.(ico|gif|jpg|jpeg|png|js|css)
RewriteRule ^([^?]*) index.php?_route_=$1 [L,QSA]

RewriteCond %{HTTP_HOST} !^www\.
RewriteCond %{HTTPS} on
RewriteCond %{SERVER_PORT} 80
RewriteRule ^(.*)$ https://www.%{HTTP_HOST}/$1 [R=301,L]

### Additional Settings that may need to be enabled for some servers
### Uncomment the commands by removing the # sign in front of it.
### If you get an "Internal Server Error 500" after enabling any of the following settings, restore the # as this means your host doesn't allow that.

# 1. If your cart only allows you to add one item at a time, it is possible register_globals is on. This may work to disable it:
# php_flag register_globals off

# 2. If your cart has magic quotes enabled, This may work to disable it:
# php_flag magic_quotes_gpc Off

# 3. Set max upload file size. Most hosts will limit this and not allow it to be overridden but you can try
php_value upload_max_filesize 999M

# 4. set max post size. uncomment this line if you have a lot of product options or are getting errors where forms are not saving all fields
hp_value post_max_size 999M

# 5. set max time script can take. uncomment this line if you have a lot of product options or are getting errors where forms are not saving all fields
hp_value max_execution_time 4800

# 6. set max time for input to be received. Uncomment this line if you have a lot of product options or are getting errors where forms are not saving all fields
php_value max_input_time 4800

# 7. disable open_basedir limitations
# php_admin_value open_basedir none

Is there anything I can do to allow SEOs on products with so many options?

We are using Opencart Version 3.0.3.6.

P.S. We have 60 SEOs

your htaccess is wrong for https, well not wrong but use this instead.
try

Thank you for your reply. Please forgive me being a complete newbie, but where do I put this code? Do I put this after RewriteRule ^(.*)$ https://www.%{HTTP_HOST}/$1 [R=301,L], or do I need to replace some of the code already there?

Replace With the above in your htaccess file.

It is difficult to tell from the front end but as you say NO seo url is being generated for that product.
It may not be the options. Carefully check the seo setup again

Since some of your SEO keywords seem to work for products with fewer options it looks to me more like an issue with your PHP settings. E.g. in the admin backend, even though it says your product is saved, it might have missed out some fields or options. Increase the values for the following PHP settings:

post_max_size
max_input_vars

Good news - I have figured out a work around. I have found that manually entering SEOs on the SEO URL page for each of the products works. Thank you two very much for your help, it is much appreciated.

torm1358 wrote: ↑

Fri May 21, 2021 11:39 pm

Good news - I have figured out a work around. I have found that manually entering SEOs on the SEO URL page for each of the products works.

".. manually entering .." means what?
How have you done this before - using an extension for that?
It seems you haven't told us the whole story ..

JNeuhoff wrote: ↑

Fri May 21, 2021 11:23 pm

Since some of your SEO keywords seem to work for products with fewer options it looks to me more like an issue with your PHP settings. E.g. in the admin backend, even though it says your product is saved, it might have missed out some fields or options. Increase the values for the following PHP settings:

post_max_size
max_input_vars

^ I reckon this is the issue, so you should fix this to avoid other issues.