Prestashop 1.7.6.2 and PHP 7.2.24 apc_fetch problem

[texxo]

Hello good people.

I updated the PHP of my prestashop 1.7.6.2 installation to version 7.2.24 (from 5.6.40) and now there is a problem like this:

I cannot access specific parts of the back office such as:

all options in Advanced Parameters

almost all in Shop Parameters (Search and Merchant Expertise seems to work)

almost all in International (Locations seems to work)

I am just getting a blank white page.

I checked the error.log file from the web server where my website is and i see:

[Sat Jan 04 19:27:16.042621 2020] [proxy_fcgi:error] [pid 6051:tid 140656521492224] [client 188.27.80.55:49659] AH01071: Got error 'PHP message: PHP Fatal error:  Uncaught Symfony\\Component\\Debug\\Exception\\UndefinedFunctionException: Attempted to call function "apc_fetch" from namespace "Doctrine\\Common\\Cache". in ....... and here goes a lot of text that has the website url, etc etc

I read somewhere that this function apc_fetch is depreciated?

If this is the case, why in prestashop website PHP 7.2 is recomended version for Prestashop 1.7.6.2 ?

(my PHP is 7.2.24 - does this .24 play such an important role? should i try with 7.1 ? or should i try to find exactly 7.2 ? )

When i switch back to PHP 5.6.40 it seems to work ok - but the point is that i wanna have the recomended PHP version for the Presta 1.7.6.2

Any help is appreciated.

Thank you.

 

[texxo]

Problem solved.

php 7.2.24 needed APCu plugin installed and then the APC backwards compatibility patch.

Now all works ok.

Someone could mark this as solved please?

[asmar]

Where can we find the apc backwards compatibility patch?

[texxo]

Hello, i dont know where the tech guy found it, but he found it, so i bet you have to search a bit online or to put someone that knows.

But it worked all ok.