Livewire v4.3.5: SFC Detection Fix for PHP Attributes | Mohamed Said [ ![Mohamed Said](https://cdn.msaied.com/01KT78WE565VEMM3PSNQAAB0MH.png) Mohamed Said Laravel Backend Engineer ](https://msaied.com) [ Home ](https://msaied.com) [ Projects ](https://msaied.com/projects) [ Articles ](https://msaied.com/articles) [ Certificates ](https://msaied.com/certificates) [ Contact ](https://msaied.com#contact-section) [ ](https://github.com/EG-Mohamed) [ Home ](https://msaied.com) [ Projects ](https://msaied.com/projects) [ Articles ](https://msaied.com/articles) [ Certificates ](https://msaied.com/certificates) [ Contact ](https://msaied.com#contact-section) [ home ](https://msaied.com) [ articles ](https://msaied.com/articles) Livewire v4.3.5 Released: Fix for SFC Detection with PHP Attribute Array Arguments On this page 1. [ Livewire v4.3.5: What Changed and Why It Matters ](#livewire-v435-what-changed-and-why-it-matters) 2. [ The Problem: SFC Detection Failing with PHP Attribute Array Arguments ](#the-problem-sfc-detection-failing-with-php-attribute-array-arguments) 3. [ The Fix ](#the-fix) 4. [ Should You Upgrade? ](#should-you-upgrade) 5. [ Key Takeaways ](#key-takeaways) ![Livewire v4.3.5 Released: Fix for SFC Detection with PHP Attribute Array Arguments](https://cdn.msaied.com/503/9678ed8dbf5d7a6f4f19ca7694cf241b.png) [ Livewire ](https://msaied.com/articles?category=livewire) #Livewire #Laravel #PHP #Bug Fix #Single File Components Livewire v4.3.5 Released: Fix for SFC Detection with PHP Attribute Array Arguments ==================================================================================== 3 Aug 2026 2 min read ![Mohamed Said](https://cdn.msaied.com/01M22N44A70A5MC2S599JP0MPH.webp) Mohamed Said Table of contents 1. [ 01 Livewire v4.3.5: What Changed and Why It Matters ](#livewire-v435-what-changed-and-why-it-matters) 2. [ 02 The Problem: SFC Detection Failing with PHP Attribute Array Arguments ](#the-problem-sfc-detection-failing-with-php-attribute-array-arguments) 3. [ 03 The Fix ](#the-fix) 4. [ 04 Should You Upgrade? ](#should-you-upgrade) 5. [ 05 Key Takeaways ](#key-takeaways) 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: ```php #[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](https://github.com/joshhanley) resolved the issue in [PR #10480](https://github.com/livewire/livewire/pull/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: ```bash composer update livewire/livewire ``` Verify the installed version: ```bash 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](https://github.com/joshhanley) via PR #10480. - No breaking changes; safe to apply immediately. - Upgrade with `composer update livewire/livewire`. --- *Source: [Livewire v4.3.5 release on GitHub](https://github.com/livewire/livewire/releases/tag/v4.3.5)* Found this useful? [ ](https://twitter.com/intent/tweet?url=https%3A%2F%2Fmsaied.com%2Farticles%2Flivewire-v435-released-fix-for-sfc-detection-with-php-attribute-array-arguments&text=Livewire+v4.3.5+Released%3A+Fix+for+SFC+Detection+with+PHP+Attribute+Array+Arguments) [ ](https://www.linkedin.com/sharing/share-offsite/?url=https%3A%2F%2Fmsaied.com%2Farticles%2Flivewire-v435-released-fix-for-sfc-detection-with-php-attribute-array-arguments) Frequently Asked Questions ---------------------------- 2 questions Q01 What bug does Livewire v4.3.5 fix? It fixes a bug where Single File Component (SFC) detection incorrectly failed when a PHP attribute on the component contained an array as one of its arguments, causing Livewire to miss the inline Blade template. Q02 Do I need to change any code after upgrading to Livewire v4.3.5? No. The fix is internal to Livewire's SFC parser. 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