What is the difference between PrestaShop 8 and 9?
PrestaShop 9 is a significant architectural update: it moves to Symfony 6.4 (from 4.4 in PS 8), drops many legacy components, and modernises the admin interface. Some backward-compatible APIs were removed, which means some older modules need updates. For store owners, the visible changes include a refreshed back office, better performance, and improved security. For developers, it means adopting modern Symfony practices.
Learn more: PrestaShop 9 migration guide.
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