Livewire v4.3.5: What Changed and Why It Matters
Released on 3 August 2026, Livewire v4.3.5 is a focused patch release for the v4.x branch. It ships exactly one fix, but it addresses a real-world parsing edge case that could silently break Single File Component (SFC) detection in certain PHP codebases.
The Problem: SFC Detection Failing with PHP Attribute Array Arguments
Livewire v4 introduced support for Single File Components — a pattern where your Blade template lives inside the same PHP class file. The framework detects SFC syntax by parsing the PHP source of a component class.
The bug fixed in this release caused that detection logic to fail when a PHP attribute on the component class (or its methods/properties) included an array as one of its arguments. For example, a component decorated like this:
#[SomeAttribute(['key' => 'value'])]
class MyComponent extends Component
{
// ...
}
The square brackets inside the attribute argument list were being misread by the SFC detector, causing it to incorrectly conclude that the file was not an SFC — even when it was. The practical result: your inline Blade template would not be picked up, and the component would silently fall back to looking for an external view file.
The Fix
Contributor @joshhanley resolved the issue in PR #10480 by updating the SFC detection logic to correctly handle PHP attribute array arguments. The parser now distinguishes between the [ / ] delimiters used in PHP attribute syntax and those that signal the start of an SFC template block.
Should You Upgrade?
If your Livewire v4 components use PHP attributes with array arguments and you rely on Single File Components, this patch is directly relevant to you. Even if you haven't hit the bug yet, upgrading is low-risk — this is a single, well-scoped fix with no breaking changes.
Upgrade via Composer:
composer update livewire/livewire
Verify the installed version:
composer show livewire/livewire | grep versions
Key Takeaways
- v4.3.5 contains one bug fix: corrected SFC detection when PHP attributes include array arguments.
- The issue caused Livewire to miss inline Blade templates in affected components.
- Fix contributed by @joshhanley via PR #10480.
- No breaking changes; safe to apply immediately.
- Upgrade with
composer update livewire/livewire.
