Stdlib: parse_url() JIT and AOT (routing in compiled binaries)

[PurHur]

Problem

parse_url() works in the VM (ext/standard/parse_url.php, compliance PHPT) and is used internally by lib/Web/DevServer.php and Superglobals::derivePathInfo(). JIT throws LogicException; AOT is unsupported (docs/capabilities.md: VM only).

Front-controller routing (#210, #276) in compiled binaries needs URL parsing without calling host PHP:

$path = parse_url($_SERVER['REQUEST_URI'], PHP_URL_PATH);

Goal

JIT and AOT fast paths for the existing VM subset:

• One- and two-argument forms
• Components: PHP_URL_PATH, PHP_URL_QUERY, PHP_URL_HOST, PHP_URL_PORT, PHP_URL_SCHEME
• Full array return for http:// / https:// URLs and path-only strings like /app?q=1

Implementation hints

1. Reuse logic from ext/standard/VmString.php (parseUrlPath, host/port split) — avoid duplicating RFC 3986; match VM outputs exactly.
2. ext/standard/parse_url.php — implement compileJIT() / wire through Internal base like strlen.
3. Add JIT compliance case if not already covered; AOT PHPT under test/fixtures/aot/cases/parse_url.phpt.
4. Register in docs/capabilities.md with --check gate in script/ci-local.sh.

Acceptance criteria

docker run --rm -v "$(pwd):/compiler" -w /compiler php-compiler:22.04-dev \
  ./script/ci-local.sh --filter parse_url

JIT compliance and AOT PHPT pass; capability matrix shows JIT/AOT yes.

Verification (local / Docker only)

make test-docker
# or:
./script/docker-ci-local.sh

Dependencies

• Stdlib: preg_match and preg_replace (routing and validation) #93 preg_match for regex routing (orthogonal; parse_url is simpler paths)
• Web: MiniWebApp routing pattern (front controller + path dispatch) #210 MiniWebApp routing spec (consumer)
• Compiler: VM/JIT comparison and equality for mixed types (routing guards) #90 mixed-type comparisons in route guards

Links

• ext/standard/parse_url.php, ext/standard/VmString.php
• test/compliance/cases/stdlib/parse_url.phpt
• 🗺️ ROADMAP: Compile a small PHP web application (living document) #78 ROADMAP Phase 2 (stdlib north-star)