[PHP.wasm] Fix sqlite_markdown extension loading

[adamziel]

What it does

Fixes the web runtime crash when loading the published sqlite_markdown
extension manifest in JSPI PHP builds.

Click here to test on Playground

Rationale

The deployed web PHP 8.4 JSPI build does not export every symbol imported by
the sqlite_markdown side module. Emscripten wires those missing imports as JS
stubs, and the browser later crashes with TypeError: n is not a function
during extension startup. The same export list is shared by the other PHP
versions, so this rebuild carries the fix across the JSPI matrix.

Implementation

Adds _strtoll and _php_info_print_table_header to the PHP export list and
rebuilds the web JSPI artifacts for PHP 7.4 through 8.5. The rebuilt modules
also pick up the existing SQLite/filesystem exports already listed for side
modules, including _sqlite3_auto_extension,
_sqlite3_cancel_auto_extension, _opendir, _readdir, _mkdir, _rename,
and _unlink.

This does not try to make Asyncify side-module loading work. PHP 8.5
Asyncify is rebuilt only as a generated-runtime canary so CI keeps exercising
one Asyncify artifact after the export-list change.

Adds a browser e2e regression that loads the real published manifest URL
pinned to 4656cd898cf8430c44e985d0515c2182ffcc5575,
creates a markdown file in the PHP filesystem, and queries the extension's
markdown_posts and markdown_postmeta SQLite virtual tables.

Testing instructions

PATH="/usr/local/opt/node@22/bin:$PATH" NX_DAEMON=false npx nx e2e php-wasm-web -- --grep "External PHP side modules" --workers=1 --project=chromium --reporter=list

Verified that all rebuilt JSPI artifacts, plus the PHP 8.5 Asyncify canary,
export strtoll and php_info_print_table_header.

Also manually verified the original URL locally through npm run dev. It
booted to /wp-admin/edit.php?post_type=page, showed the markdown editor admin
notice, and listed the markdown-backed pages.

[Copilot]

Pull request overview

Note

Copilot was unable to run its full agentic suite in this review.

Fixes a PHP 8.4 web runtime crash when loading the published sqlite_markdown extension manifest by exporting the missing _strtoll and _php_info_print_table_header symbols and rebuilding the JSPI artifact. Also adds an e2e regression test.

Changes:

• Add _strtoll and _php_info_print_table_header to the PHP exported functions list.
• Rebuild PHP 8.4 JSPI web artifact (8.4.20 → 8.4.21) picking up newly exported symbols.
• Add a Playwright e2e test that loads the real published sqlite_markdown manifest and queries its virtual tables.

Reviewed changes

Copilot reviewed 3 out of 4 changed files in this pull request and generated 3 comments.

File	Description
packages/php-wasm/compile/php/exported-functions.list	Adds _strtoll and _php_info_print_table_header to exported symbols.
packages/php-wasm/web-builds/8-4/jspi/php_8_4.js	Regenerated runtime exposing new exports and bumping to 8.4.21.
packages/php-wasm/web/src/test/php-dynamic-loading.spec.ts	New e2e test verifying the published sqlite_markdown extension loads and works.

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