# CONTRACT-SCANNER-PHP-ANALYZER-013: PHP Language Analyzer Bootstrap

> **Status:** Published
> **Version:** 1.0.0
> **Published:** 2025-12-05
> **Owners:** PHP Analyzer Guild, Scanner Guild
> **Unblocks:** SCANNER-ANALYZERS-PHP-27-001

## Overview

This contract defines the PHP language analyzer bootstrap specification, including composer manifest parsing, VFS (Virtual File System) schema, and offline kit target requirements for deterministic PHP project analysis.

## Scope

The PHP analyzer will:
1. Parse `composer.json` and `composer.lock` files
2. Build virtual file system from source trees, vendor directories, and configs
3. Detect framework/CMS fingerprints (Laravel, Symfony, WordPress, Drupal, etc.)
4. Emit SBOM components with PHP-specific PURLs
5. Support offline analysis via cached dependencies

---

## Input Normalization

### Source Tree Merge

The analyzer merges these sources into a unified VFS:

```
Priority (highest to lowest):
1. /app (mounted application source)
2. /vendor (composer dependencies)
3. /etc/php* (PHP configuration)
4. Container layer filesystem
```

### File Discovery

```csharp
public interface IPhpSourceDiscovery
{
    IAsyncEnumerable<PhpSourceFile> DiscoverAsync(
        string rootPath,
        PhpDiscoveryOptions options,
        CancellationToken ct);
}

public record PhpDiscoveryOptions
{
    public bool IncludeVendor { get; init; } = true;
    public bool IncludeTests { get; init; } = false;
    public string[] ExcludePatterns { get; init; } = ["*.min.php", "cache/*"];
}
```

---

## Composer Schema

### composer.json Parsing

```json
{
  "name": "vendor/package",
  "version": "1.2.3",
  "type": "library|project|metapackage|composer-plugin",
  "require": {
    "php": ">=8.1",
    "vendor/dependency": "^2.0"
  },
  "require-dev": { },
  "autoload": {
    "psr-4": { "App\\": "src/" },
    "classmap": ["database/"],
    "files": ["helpers.php"]
  }
}
```

### composer.lock Parsing

Extract exact versions and content hashes:

```csharp
public record ComposerLockPackage
{
    public string Name { get; init; }
    public string Version { get; init; }
    public string Source { get; init; }  // type: git|hg|svn
    public string Dist { get; init; }    // type: zip|tar
    public string Reference { get; init; } // commit hash or tag
    public string ContentHash { get; init; } // SHA256 of package contents
}
```

### PURL Format

```
pkg:composer/vendor/package@version
pkg:composer/laravel/framework@10.0.0
pkg:composer/symfony/http-kernel@6.3.0
```

---

## VFS Schema

### Virtual File System Model

```csharp
public record PhpVirtualFileSystem
{
    public string RootPath { get; init; }
    public IReadOnlyList<VfsEntry> Entries { get; init; }
    public PhpConfiguration PhpConfig { get; init; }
    public ComposerManifest Composer { get; init; }
    public string ContentHash { get; init; } // BLAKE3 of sorted entries
}

public record VfsEntry
{
    public string RelativePath { get; init; }
    public VfsEntryType Type { get; init; }
    public long Size { get; init; }
    public string ContentHash { get; init; }
    public DateTimeOffset ModifiedAt { get; init; }
}

public enum VfsEntryType
{
    PhpSource,
    PhpConfig,
    ComposerJson,
    ComposerLock,
    Vendor,
    Asset,
    Config
}
```

### Deterministic Ordering

VFS entries MUST be sorted by:
1. `RelativePath` (case-sensitive, lexicographic)
2. Stable hash computation across runs

---

## Framework Detection

### Fingerprint Rules

| Framework | Detection Method | Confidence |
|-----------|-----------------|------------|
| Laravel | `artisan` file + `Illuminate\` namespace | High |
| Symfony | `symfony.lock` or `config/bundles.php` | High |
| WordPress | `wp-config.php` + `wp-includes/` | High |
| Drupal | `core/lib/Drupal.php` | High |
| Magento | `app/etc/env.php` + `Magento\` namespace | High |
| CodeIgniter | `system/core/CodeIgniter.php` | Medium |
| Yii | `yii` or `yii2` in composer | Medium |
| CakePHP | `cakephp/cakephp` in composer | Medium |

### Fingerprint Output

```csharp
public record PhpFrameworkFingerprint
{
    public string Name { get; init; }
    public string Version { get; init; }
    public ConfidenceLevel Confidence { get; init; }
    public IReadOnlyList<string> IndicatorFiles { get; init; }
}
```

---

## PHP Configuration

### Config File Discovery

```
/etc/php/*/php.ini
/etc/php/*/conf.d/*.ini
/etc/php-fpm.d/*.conf
/usr/local/etc/php/php.ini (Alpine)
```

### Security-Relevant Settings

Extract and report:

```csharp
public record PhpSecurityConfig
{
    public bool AllowUrlFopen { get; init; }
    public bool AllowUrlInclude { get; init; }
    public string OpenBasedir { get; init; }
    public string DisableFunctions { get; init; }
    public string DisableClasses { get; init; }
    public bool ExposePhp { get; init; }
    public bool DisplayErrors { get; init; }
}
```

---

## Output Schema

### SBOM Component

```json
{
  "type": "library",
  "bom-ref": "pkg:composer/vendor/package@1.2.3",
  "purl": "pkg:composer/vendor/package@1.2.3",
  "name": "vendor/package",
  "version": "1.2.3",
  "properties": [
    { "name": "stellaops:php:framework", "value": "laravel" },
    { "name": "stellaops:php:phpVersion", "value": ">=8.1" },
    { "name": "stellaops:php:autoload", "value": "psr-4" }
  ],
  "evidence": {
    "identity": {
      "field": "purl",
      "confidence": 1.0,
      "methods": [{ "technique": "manifest-analysis", "value": "composer.lock" }]
    }
  }
}
```

### Analysis Store Keys

```csharp
public static class PhpAnalysisKeys
{
    public const string VirtualFileSystem = "php.vfs";
    public const string ComposerManifest = "php.composer";
    public const string FrameworkFingerprints = "php.frameworks";
    public const string SecurityConfig = "php.security-config";
    public const string Autoload = "php.autoload";
}
```

---

## Offline Kit Target

### Bundle Structure

```
offline/php-analyzer/
├── manifests/
│   └── php-analyzer-manifest.json
├── fixtures/
│   ├── laravel-app/
│   ├── symfony-app/
│   └── wordpress-site/
├── vendor-cache/
│   └── packages.json (Packagist mirror index)
└── SHA256SUMS
```

### Air-Gap Operation

```csharp
public interface IOfflineComposerRepository
{
    Task<ComposerPackage?> ResolveAsync(string name, string version, CancellationToken ct);
    Task<bool> IsAvailableOfflineAsync(string name, string version, CancellationToken ct);
}
```

---

## Test Fixtures

### Required Fixtures

| Fixture | Purpose |
|---------|---------|
| `laravel-10-app/` | Laravel 10.x application with mix/vite |
| `symfony-6-app/` | Symfony 6.x with Doctrine |
| `wordpress-6-site/` | WordPress 6.x with plugins |
| `drupal-10-site/` | Drupal 10.x with modules |
| `composer-only/` | Pure library project |
| `legacy-php56/` | PHP 5.6 compatibility test |

### Golden Output Format

```
fixtures/<name>/
├── composer.json
├── composer.lock
├── src/
├── EXPECTED.sbom.json    # Expected SBOM output
├── EXPECTED.vfs.json     # Expected VFS structure
└── EXPECTED.meta.json    # Expected fingerprints
```

---

## Implementation Path

### Phase 1: Core Parser
1. Implement `ComposerJsonParser`
2. Implement `ComposerLockParser`
3. Add PURL generation
4. Basic VFS construction

### Phase 2: Framework Detection
1. Implement fingerprint rules
2. Add confidence scoring
3. Version detection

### Phase 3: Offline Support
1. Implement vendor cache
2. Add offline repository
3. Bundle generation

---

## Project Location

```
src/Scanner/StellaOps.Scanner.Analyzers.Lang.Php/
├── StellaOps.Scanner.Analyzers.Lang.Php.csproj
├── ComposerJsonParser.cs
├── ComposerLockParser.cs
├── PhpVirtualFileSystem.cs
├── PhpFrameworkDetector.cs
├── PhpLanguageAnalyzer.cs
├── PhpAnalyzerPlugin.cs
└── README.md
```

---

## Changelog

| Version | Date | Author | Changes |
|---------|------|--------|---------|
| 1.0.0 | 2025-12-05 | PHP Analyzer Guild | Initial contract |