On August 11, 2026, the OpenCart team simultaneously published two updates
for the platform's active branches — versions 3.0.5.1 and 4.1.0.4. Both
releases focus on fixing bugs that accumulated in the previous builds
3.0.5.0 and 4.1.0.3, and they officially formalize support for the newest
PHP 8.5.
For online store owners, this means that both current OpenCart branches have
now received a package of fixes that eliminates issues identified over
recent months. Particular attention has been paid to compatibility with PHP
8.5, released on November 20, 2025, along with security and stability of the
core. Both builds are already available for download from the official
GitHub repository.
Fixes in the OpenCart 4.1.0.4 Release
The previous stable build of the 4.1 branch — version 4.1.0.3 — was
published on March 24, 2025 and contained mostly PHPDoc comment corrections
along with partial fixes to the upgrade procedure. In the nearly seventeen
months that have passed since that release, a significant number of patches
accumulated in the 4.x.x.x branch. Public testing of the release candidate
ran from May 2026. During this period, fixes were introduced for the admin
order editor, the variant product option overrides editor, the manufacturer
SEO module, as well as dozens of smaller corrections from contributors.
Release 4.1.0.4 received full compatibility with PHP 8.5, an updated upgrade
script, and numerous security and stability fixes across the storefront and
admin panel. This version is positioned as a stable build of the 4.1 branch,
suitable for deployment on production projects.
The OpenCartBot team contributed to this release with ten of our own fixes.
The most notable patch concerns the language and currency switcher in the
storefront — before its introduction, links were generated incorrectly and
led to 404 errors when switching between locales and currencies (commit
fccdcc8). The remaining patches from our side addressed
internal core logic, product data handling, and the admin interface.
The full list of our commits for 4.1.0.4:
-
fccdcc8
— fixed broken links in the language and currency switcher
-
2b413cd
— fixed possible undefined index 'user_token' -
3f87978
— missing language text: text_admin_delete_success
-
7d891b4
— fixes in Account
-
964aa4c
— fix alert on mobile view -
515fbb5
— some fixes in twig templates -
2e0bcf5
— documentation link with 404 error -
73b525e
— admin favicon -
811590e
— statistics name tranlsation -
83121fa
— missing html tag
Stores running on 4.1.0.3 can update to 4.1.0.4 through the standard upgrade
mechanism. Before the procedure, it is advisable to perform a complete
backup of files and the database.
OpenCart 3.0.5.1 Update
Version 3.0.5.0 was released on December 12, 2025 and was already a stable
build capable of powering production online stores. Over the nearly eight
months of operation, the community identified several bugs that required
prompt attention.
Release 3.0.5.1 preserves the architecture of its predecessor and adds
targeted fixes on top of it. The main focus is full compatibility with PHP
8.5. In version 3.0.5.0, support for the new PHP was declared as initial and
required additional verification for certain scenarios. Several third-party
vendor libraries have also been updated, since some of them could previously
conflict with the new language syntax.
OpenCartBot contributed one fix to this branch as well (commit 354f339), aimed at stabilizing the operation of a component in the third-version
core — fixed preventing adding SEO URL for a second language in Design -> SEO URL.
Since most modules in the OpenCart marketplace are still written for the
3.0.x.x branch, upgrading to 3.0.5.1 remains a safe and recommended path for
stores that are not yet ready to migrate to the fourth version.
PHP 8.5 Support in the New Releases
PHP 8.5 was published on November 20, 2025. This version adds the pipe
operator for sequential data processing, improved URL handling, more
flexible object cloning, and a number of internal performance optimizations.
Along with these additions, PHP 8.5 introduces stricter typing rules and
deprecates certain syntactic constructs — specifically casts of the form
(boolean), (integer), (double),
(binary), as well as legacy case variants in
switch constructions.
For CMS platforms, such changes mean the need to adapt the entire codebase.
In releases 3.0.5.1 and 4.1.0.4, the OpenCart team carried out a review of
the core, the Twig templating engine, and third-party vendor libraries in
order to ensure correct operation on the new PHP version without deprecation
notices in the logs.
The recommendation for store owners remains conservative. PHP 8.5 should be
deployed only after testing in a staging environment. For production
projects over the next six to twelve months, it is advisable to remain on
the proven PHP 8.2–8.3 versions, which are supported by both current
OpenCart branches.
Daniel Kerr's Work on OpenCart 5
Alongside supporting the current branches, the project founder Daniel Kerr
is developing OpenCart 5 — the next generation of the platform with a
fundamentally updated rendering architecture.
According to the plan, OpenCart 5 will work with server-side rendering (SSR)
and use a JavaScript template engine of its own design —
CurlyTag, whose
repository has already been published on Daniel's GitHub profile. Such an
approach should open the way to integration with modern frontend frameworks,
isomorphic rendering, and better client-side performance while preserving
the SEO advantages inherent to the classic server-side approach.
The exact release date for OpenCart 5 has not yet been announced. Until the
new major version arrives, branches 3.0.x.x and 4.1.x.x will remain the main
options for stores that need stable operation.
The full changelog for both releases is available on the official
OpenCart GitHub repository page. Files for both builds can also be downloaded from there for manual
installation or upgrade.
