
Fixing bugs (and there were more of them than there were when prestashop 1.7.6.0 was released) and adding improvements to existing functions took more than a year. The main difference in this version is the failure to be compatible with PHP versions lower than 7.1.3. To run prestashop 1.7.7.0 you will need PHP version >= 7.1.3. Also prestaShop 1.7.7.0 introduces support for PHP version 7.3. Also, the changes affected the updates of jQuery and Smarty.
Key New features and improvements in this version:
1. The order list pages and order cards have been redesigned and completely migrated to symfony. (Read more – https://build.prestashop.com/news/the-new-order-pages-in-prestaShop-1-7-7/)
Here’s what the order list page looks like:

It has now evolved into an accordion:

Here’s what the order page looks like:

2. Improved search engine in the front office.
3 . Sellers have the ability to add new official and unofficial currencies (for example, local or custom) to their store and customize their display depending on the language:


4. You can now translate an email theme in the back office using the new email theme introduced in prestashop version 1.7.6 and available under Design > Email Subject:

5. New languages have been added to prestashop and its installer, and language packs have been updated.
6. Emoji Support: All database tables are now encoded in utf8mb4 by default, which allows you to support emoji both in the front office and in the back office:


7. and so on.
In this version, 15 new pages have been ported to symfony, including the order pages:
– Orders > Orders: List, view and edit, add
– Orders > Payment receipts
– Orders > Shopping Cart: View
– Catalog> Monitoring
– Catalog > Brands and suppliers: Announcement, view, add and edit
– Directory > Files: List, add and edit
– Customer Service > Order Messages > List, Add and Edit
– Customers > Addresses > Announcement, addition and modification
As a result, the total number of migrated content reached almost 55% in the back office.
New hooks have also been added:
1. displayAdditionalCustomerAddressFields
2. displayFooterCategory
3. actionAdminAdminPreferencesControllerPostProcessBefore
These are the major visible changes and improvements for this version.