If you have problems updating quantity in checkout/cart

On products with any options and or recurring profiles I was unable to use the update quantity feature in checkout/cart/edit
The result was an empty []
After some hunting I found that the product[key] gets too long and is filtered by Suhosin PHP protection.
This will give an empty array thus

CODE:

if (!empty($this->request->post['quantity']))

never gets fired to do its job.

The standard Suhosin settings for the length is 64 but one product_id + one recurring_id base_encoded and serialized makes up 82 chars.

CODE:

var_dump(strlen('quantity[YToyOntzOjEwOiJwcm9kdWN0X2lkIjtpOjUxO3M6MTI6InJlY3VycmluZ19pZCI7aToxO30=]')); //82

Only took my all afternoon as I first suspected mod_security and then a possible bug with OC

Add the following lines to your php.ini

CODE:

suhosin.post.max_array_index_length = 256
suhosin.post.max_name_length = 256
suhosin.post.max_array_depth = 256
suhosin.request.max_array_index_length = 256
suhosin.request.max_varname_length = 256
suhosin.request.max_array_depth = 256


You can try to add it to your php.ini in the catalog part or, depending on your hosting create a .user.ini (there’s a dot in front of user!)

I hope this will be of any help. I read some people really moved hosts on this matter but it’s an easy fix!

https://suhosin.org/stories/configuration.html#id82