fix: undefined array key 'context' warning in Gutenberg.php (PHP 8+)

[devinle]

Summary

• Adds null coalescing check for context parameter in extend_post_content method
• Prevents PHP 8+ "Undefined array key" warnings that corrupt JSON responses

Fixes #940

Problem

The extend_post_content method in Gutenberg.php accesses $params['context'] without checking if the key exists. In PHP 8.0+, this triggers an "Undefined array key" warning when the context query parameter is not explicitly provided in the REST API request.

This warning is output before the JSON response, corrupting the response body:

<br />
<b>Warning</b>: Undefined array key "context" in <b>.../Gutenberg.php</b> on line <b>90</b><br />
[{"id":123,...}]

Solution

Use the null coalescing operator to default to an empty string when context key doesn't exist:

// Before
if ( 'view' !== $params['context'] ) {

// After  
if ( 'view' !== ( $params['context'] ?? '' ) ) {

Test plan

• Make REST API request without context parameter: GET /wp-json/wp/v2/pages?slug=test
• Verify response is clean JSON without PHP warnings
• Make REST API request with context parameter: GET /wp-json/wp/v2/pages?slug=test&context=view
• Verify block_styles are still added to response when context=view

🤖 Generated with Claude Code

---

Note

Low Risk
Low risk: a small guard change that only affects the conditional gating of extend_post_content when the REST request omits context, preventing PHP 8+ warnings without changing behavior for context=view requests.

Overview
Prevents PHP 8+ "Undefined array key" warnings in Gutenberg::extend_post_content by safely handling missing REST request context (defaults to empty string) before deciding whether to extend the rendered content.

Adds a patch changeset entry for the @headstartwp/headstartwp release.

^{Written by Cursor Bugbot for commit 9338be8. This will update automatically on new commits. Configure here.}

[changeset-bot]

🦋 Changeset detected

Latest commit: 9338be8

The changes in this PR will be included in the next version bump.

This PR includes changesets to release 1 package

Name	Type
@headstartwp/headstartwp	Patch

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Project	Deployment	Actions	Updated (UTC)
headstartwp-app-router	Ready	Preview, Comment	Feb 2, 2026 8:11pm
headstarwp	Ready	Preview, Comment	Feb 2, 2026 8:11pm