Web: PATH_INFO and front-controller routing ($_SERVER)

[PurHur]

Problem

Front controllers route on $_SERVER['PATH_INFO'] or parse REQUEST_URI:

$uri = $_SERVER['PATH_INFO'] ?? parse_url($_SERVER['REQUEST_URI'], PHP_URL_PATH);

lib/Web/Superglobals.php sets REQUEST_URI and SCRIPT_NAME but not PATH_INFO consistently for bin/serve / CGI.

Goal

PATH_INFO populated when request is /index.php/foo/bar (common Apache/nginx + PHP-FPM pattern).

Implementation plan

1. Extend Superglobals::populateServer() to derive PATH_INFO from REQUEST_URI minus SCRIPT_NAME.
2. Web: CGI/1.1 request driver (stdin/stdout, env, Status line) #50 CGI driver: parse PATH_INFO env var when present.
3. DevEx: bin/serve.php — local HTTP server for web development #88 serve.php: set PATH_INFO for pretty URLs.
4. PHPT: GET with path suffix, assert routing string.

Acceptance criteria

• test/real/cases/web_path_info.phpt passes VM
• Document nginx try_files equivalent for AOT deploy

Related

• Web: CGI/1.1 request driver (stdin/stdout, env, Status line) #50 CGI
• DevEx: bin/serve.php — local HTTP server for web development #88 bin/serve
• Stdlib: urlencode, rawurlencode, parse_url for routing #76 parse_url (done)
• Reference app: examples/003-MiniWebApp (router, templates, forms) #67 MiniWebApp router