composer

composer/ca-bundle

PHP MIT Security

Lets you find a path to the system CA bundle, and includes a fallback to the Mozilla CA bundle.

3k stars
40 forks
recent
GitHub

3k

Stars

40

Forks

1

Open issues

30

Contributors

1.5.12 19 May 2026

AI Analysis

Composer/ca-bundle is a lightweight PHP utility for locating and validating system CA certificates, with a fallback to Mozilla's bundled CA bundle. It serves PHP developers building HTTPS clients that need reliable SSL/TLS certificate verification across different server environments. This is a narrow but essential tool for library maintainers and framework developers, not for end-user applications.

Security Library Discovery value: 3/10
Documentation 8/10
Activity 9/10
Community 8/10
Code quality 5/10

Inferred from signals mentioned in the README (tests, CI, type safety) — not a review of the actual code.

Overall score 8/10

AI's overall editorial judgment — not an average of the bars above, can weigh other factors too.

ca-bundle ssl-certificates php-utility https-verification certificate-management
Actively maintained Well documented MIT licensed Niche/specialized use case Production ready
Deep Analysis · Based on README and public signals
1w ago

Lightweight PHP library for locating system CA certificates with Mozilla fallback

composer/ca-bundle is a small utility library that abstracts the complexity of finding system CA certificate bundles across different operating systems, with a bundled Mozilla CA certificate as fallback. Originally extracted from Composer itself, it is widely integrated into PHP projects that need reliable HTTPS certificate validation without manual configuration. Real-world adoption is substantial among PHP developers, though not overtly visible because it is typically used as a dependency of other packages.

Origin

Created in April 2016, extracted from the Composer package manager codebase where it solved a practical problem: Composer needed portable, reliable CA bundle detection across Windows, macOS, and Linux environments. Released as a standalone library to reduce duplication and serve the broader PHP ecosystem.

Growth

Growth was rapid in early years as Composer gained adoption and other projects recognized the utility value. Since ~2020, growth has plateaued at a modest rate (1 star per 7 days at current measurement), which is typical for a stable, feature-complete utility library in low-volatility infrastructure. No major feature additions needed; maintenance is primarily CA bundle updates and compatibility fixes.

In production

Direct adoption not explicitly verified from README, but adoption appears substantial because: (1) Composer itself uses it as a foundational dependency, (2) widely documented in PHP ecosystem for HTTPS configuration (examples show integration with curl, streams, Guzzle), (3) dependency relationship suggests inclusion in many transitive chains. However, end-user awareness is minimal because usage is typically indirect.

Code analysis
Architecture

Based on README, the library exposes a static-method API via `CaBundle` class. Appears to use OS-level detection (likely via environment inspection and file system checks) to locate system CA bundles, with fallback to bundled Mozilla CA file. Likely implements caching via static properties to avoid repeated lookups. Constructor pattern not mentioned, suggesting stateless or minimal state design.

Tests

Not documented in README. Repository metadata does not indicate CI/CD pipeline or test status.

Maintenance

Last push 2026-05-29 (32 days before evaluation date) indicates active maintenance. Repository shows consistent, periodic activity. No evidence of backlog accumulation or deprecated dependencies. Low churn on issues/PRs suggests stability rather than active feature development. Appropriate for a mature, feature-complete utility.

Honest verdict

ADOPT IF: your PHP application needs to verify HTTPS certificates and you want portable, zero-configuration CA bundle detection across OS platforms; or you are building a PHP library that performs HTTP requests. AVOID IF: you are using a framework (Laravel, Symfony, etc.) that already bundles CA bundle handling, or if your deployment always provides explicit CA paths. MONITOR IF: you maintain a large number of PHP applications and want to standardize on a single CA bundle strategy; periodic updates (e.g., Mozilla CA bundle refreshes) may require tracking.

Independent dimensions

Mainstream potential

3/10

Technical importance

6/10

Adoption evidence

7/10

Risks
  • Dependency on external Mozilla CA bundle means updates to certificate revocations are tied to package releases rather than OS-level updates. Mitigated by periodic maintainer updates, but introduces slight lag.
  • Relies on system CA bundle paths that vary across OS and distribution; edge cases may exist in specialized environments (containers, embedded systems) where paths differ from documented conventions.
  • Static-method API may complicate testing in codebases with strict dependency injection; callers must mock the static class or accept direct dependency.
  • Long-term support tied to maintainer availability; package is stable but small and not institutionally backed (unlike Symfony or Laravel projects).
  • No documented fallback if both system and bundled CA bundles are unavailable; behavior in degraded scenarios unclear from README.
Prediction

Will remain a stable, slow-growth utility library. Unlikely to see major feature additions. Primary activity will be periodic Mozilla CA bundle updates and PHP compatibility fixes. Adoption will remain implicit (via transitive dependencies) rather than explicit. May gradually shift to maintenance-only status as PHP ecosystem matures.

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Languages

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Information

Language
PHP
License
MIT
Last updated
1w ago
Created
125mo ago
Analyzed with
anthropic/claude-haiku-4-5

Stars over time

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Contributors over time

Top 100 contributors only — repos with more will plateau at 100.

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vs. alternatives
phpseclib

Broader cryptographic library (5.5k stars) covering encryption, SSH, X.509. ca-bundle is narrowly focused on CA bundle location; phpseclib can validate certificates but requires more setup. Different niches: ca-bundle is infrastructure glue; phpseclib is crypto workbench.

cloudflare/cfssl

Go-based certificate tooling (9.4k stars) for certificate issuance and validation at scale. Targets DevOps/infrastructure; ca-bundle targets runtime PHP applications needing to verify peers. Not competitors in practice.

symfony/maker-bundle

Symfony development utility (3.4k stars) for code generation. Unrelated to certificate handling; included only due to star count proximity. No meaningful comparison.