PrestaShop 8.1 Archives - Knowband Blog

With the release of PrestaShop 9.0, the platform is moving toward a more modern, performance-oriented, and developer-friendly future. However, as with any major update, merchants and developers are left with an important question: Is now the right time to migrate from PrestaShop 8.1?

In this blog, we’ll explore the key differences between PrestaShop 8.1 and 9.0. From performance upgrades to developer tools, we’ll cover everything you need to know to make an informed decision about your store’s future.

Symfony Framework Upgrade: From 4.4 to 6.4

To begin with, one of the most significant changes in PrestaShop 9.0 is the upgrade of the Symfony framework from version 4.4 to Symfony 6.4, the latest long-term support (LTS) release. This transition ensures better stability, security, and access to modern development tools.

Symfony 6.4 will be maintained with bug fixes through November 2026 and security patches until November 2027, ensuring long-term stability for evolving projects. By comparison, Symfony 4.4—used in PrestaShop 8.1—has already reached the end of its support life. Therefore, PrestaShop 9.0 becomes the smarter choice for long-term projects.

PHP Compatibility and Performance Enhancements

In addition, PrestaShop 9.0 introduces support for PHP 8.1, 8.2, and 8.3. This allows merchants to benefit from improved performance, better memory handling, and modern PHP features.

Unlike PrestaShop 8.1, which stopped at PHP 8.1, the new version embraces the latest PHP releases, representing a major step forward. As a result, PrestaShop 9.0 is better aligned with modern PHP standards and development practices. However, keep in mind that older hosting environments and custom code may require updates to ensure compatibility.

Modern API Platform for Headless Commerce

Furthermore, PrestaShop 9.0 brings a brand-new API system based on API Platform v3, dramatically improving how it interacts with external applications.

This makes it ideal for headless commerce architectures, mobile app integrations, and third-party services. In contrast, PrestaShop 8.1 relied on a legacy API, which lacked the flexibility and scalability modern developers expect. As a result, the new API system opens up a world of opportunities for automation and integration.

PrestaShop 9 debuts a completely reimagined Admin API, built using API Platform—a cutting-edge PHP framework known for its flexibility and power. This innovation marks a significant leap toward creating a more open, extensible, and developer-focused PrestaShop environment.

Here’s what the new Admin API offers:

Simplified integration with external platforms such as ERPs, CRMs, and marketing tools.
Automation-ready architecture that helps reduce manual store management and boosts operational efficiency.
RESTful structure with JSON formatting, ensuring ease of use for developers accustomed to modern API standards.
Future-ready modularity, allowing the system to grow and adapt with community and business demands.

It’s worth noting that the Admin API is still evolving. While the core framework is already in place, additional features and endpoints are being actively developed.

Key Hook Updates in PrestaShop 9

PrestaShop 9 retains most of the widely used hooks from version 8 to ensure module and theme compatibility. Common front-office hooks like displayHeader, displayFooter, displayHome, and displayProductButtons remain supported. In the back office, important hooks such as displayBackOfficeHeader, displayAdminOrderMain, and displayAdminProductsExtra are still available for extending core functionality.

Alongside these, PrestaShop 9 introduces modern Symfony-based hooks like actionSymfonyResponse, actionAfterCartSave, and actionProductFormBuilderModifier. These offer a cleaner, event-driven approach to customisation and are part of the platform’s move toward a more modular, scalable structure.

Redesigned Back Office Using Symfony and Twig

Another significant improvement is the full revamp of the back office, now built with Symfony and Twig for a more modern and maintainable structure. This results in a more intuitive, mobile-friendly, and user-centred admin experience.

For store owners, the redesigned layout means easier navigation and improved productivity. For developers, the shift supports cleaner templating and reduces legacy code dependencies. On the other hand, PrestaShop 8.1 retains a more traditional interface, which may now feel outdated in comparison.

Developer-Focused Improvements

Additionally, PrestaShop 9.0 has replaced several outdated libraries used in previous versions. For example:

Guzzle HTTP Client → Symfony HTTP Client
SwiftMailer → Symfony Mailer

These updates result in a more secure, efficient, and future-proof module and email handling.

Moreover, the login system has been modernised. Legacy hooks have been removed, and a new actionBackOfficeLoginForm hook has been introduced, offering cleaner and more customizable authentication flows.

Transition Toward Twig Templates

Importantly, PrestaShop 9.0 also makes a bold move toward full Twig integration, gradually replacing the legacy Smarty engine. Twig is now widely used in both front and back offices, offering more readable, modular, and reusable templates.

For theme developers, this is a significant improvement. In contrast, PrestaShop 8.1’s reliance on Smarty limits flexibility and long-term maintainability.

Should You Upgrade to PrestaShop 9.0?

PrestaShop 9.0 brings major improvements—but before upgrading, make sure your store is ready to handle the change. If your themes, modules, and hosting environment are compatible—or can be easily updated—then migrating can bring notable performance and UX benefits.

Alternatively, if your current store depends heavily on legacy plugins or complex custom code, it might be wiser to wait until broader module support becomes available. Testing in a staging environment is highly recommended before committing to a full upgrade.

Migration Tips for Store Owners

Before making the switch, follow these best practices:

Backup your entire store, including the database and any custom files.
Test the upgrade in a staging environment first to avoid disrupting your live store.
Verify compatibility for all third-party themes and modules.
Monitor community feedback for bug reports and migration issues.
Conduct thorough testing, especially checkout, payment, and product display areas.

Final Thoughts

PrestaShop 9.0 marks a major leap toward a modern, secure, and scalable e-commerce platform. From faster performance and updated frameworks to a cleaner developer experience, it brings meaningful benefits for merchants and developers alike.

In conclusion, while migration requires effort and planning, the long-term gains make it a worthwhile investment. Whether you’re a seasoned PrestaShop user or planning your first store, now is an excellent time to explore what version 9.0 can do for your business.

If you’re looking for a reliable solution to ensure a smooth upgrade, KnowBand offers custom module development and PrestaShop 9.0-ready extensions that can accelerate your transition. Their expert support and robust library of PrestaShop modules make them a valuable partner during major upgrades.

Migrating your PrestaShop 1.7 store to Prestashop 8.1 offers a lot of noticeable benefits, which include the enhanced performance of your store, improved security features, and access to the latest technologies.

The PrestaShop 8.1 brings a more efficient and secure operating environment with support for the latest PHP and MySQL versions, enhancing the site speed and responsiveness of your store.

For example, the new functionalities introduced in the PrestaShop 8 and above versions such as the Password Strength Indicator which not only enhance the security of your store but also improve the user experience are notable improvements in this version.

Hence, by upgrading the store’s PrestaShop version to 8.1, you also ensure continued support from the community of PrestaShop, access to updates, and better compliance with current web standards, keeping your store competitive and well-optimized for search engines.

Migrating from PrestaShop 1.7 to PrestaShop 8.1 is highly beneficial for several reasons and some of those are mentioned below:-

Updated Core Technologies: The move to PrestaShop 8.1 brings significant upgrades to essential technologies like Bootstrap and Symfony versions have been upgraded to v4.4.
Support for the newer PHP versions: PrestaShop 8.1 provides the support for the latest versions of PHP ranging from 7.2.5 up to 8.1.
Enhanced Security Features: The introduction of a Password Strength Indicator is a significant enhancement in PrestaShop 8.1 which provides real-time feedback to customers creating accounts encouraging the creation of stronger and more secure passwords by showing clues for strength improvement.

Prerequisites for the Migration

1. Technical Requirements Check

Server Compatibility: Verify that your hosting environment meets the updated specifications required by PrestaShop 8.1, especially PHP version 7.4 or newer and MySQL version 5.6 or higher as it ensures your server can effectively handle the new software without compatibility issues.

Theme and Module Compatibility: Assess whether your existing themes and modules are compatible with PrestaShop 8.1. If they aren’t, you will need to either update them or look for suitable replacements to maintain the functionality and design of your store.

2. Data Backup

Comprehensive Backups: Rigorously back up all your website files, database entries, and configuration settings. This step is vital as it provides a safety net, allowing you to restore your store to its original state should there be any issues during the migration process.
Backup Validation: Test these backups in a staging environment to confirm their integrity and functionality. This validation helps ensure that you can reliably revert to the original system if needed.

3. Staging Environment Setup

Replicate Live Environment: A staging environment needs to be set up that replicates the live configuration as closely as possible and then uses this environment to perform the migration tests.

Migration of Data

Export Data:

Use tools like phpMyAdmin to export your database in CSV from the PrestaShop 1.7 store.
Go to the Database of your store and then click on the Export button present at the top of the phpMyAdmin.
Please check the breadcrumbs to verify that you are exporting a Database and a table.

While exporting the data, please make sure to check the ‘Put columns names in the first row’ and ‘Export tables as separate files’. This will provide separate CSV files for each table present in your Database.

Modify and Import Data:

Depending on the changes in database structure between 1.7 and 8.1, you may need to adjust the SQL data (like altering table structures, column names, etc.) before importing it into your new PrestaShop 8.1 database. Therefore, this step can be complex and requires thorough testing.

For every change in the new structure, we have to modify our respective CSVs.

Import the Data-

Install the Prestashop 8.1. While installation, be aware that, you don’t need to install the Demo data as we need a clean store for the Import.
Now, install the languages you are using on your live store to the PS8.1 store.
Now, for every table on the PS8.1 store in the phpMyAdmin, please clear the data of the table first and then import the CSV for that table.
While importing, please make sure that the format of the file is marked as CSV and skip the import of the first line of CSV as it holds the name of the columns.
Document every change made to the data and the reasoning behind each modification as this documentation will be helpful for future reference and for maintaining the store.

Final Stage in the Migration: –

Furthermore, Complete testing will be required once the data is imported into the new PrestaShop 8.1 setup needs to be done to make sure that all the store’s functionalities are working as desired and at last the store can be made live to the public when there are no issues found in the testing process of the store.

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Tag: PrestaShop 8.1

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