Hi, I just got a site from a client and the site is running wordpress 3.4.2. and ACF Version 3.4.2
Firs, I apologize for my english and lack of knowledge of ACF in general. I have a problem with athe website. It uses ACF, which I have never used before.
I downloaded a full copy of the site to test the update and all worked perfectly except for one page where the following code is.
I did a var_dump before upgrading wordpress and ACF and I get an array with all the data. then I upgraded wordpress and ALL plugins except ACF, and it is still working perfectly. But after upgrading ACF to latest version the var_dump displays only ‘4’.
Version 3 field types are different from the ones in the Pro version but ACF Pro contains a database upgrade tool to cater for this.
I would recommend you use the following workflow to upgrade the plugin:
1). Download a copy of ACF v4 from this link and upgrade to this copy https://wordpress.org/plugins/advanced-custom-fields/
2). After this is done you can then upgrade to Pro to ensure that your field types are compatible.