Shared PHP.wasm runtime API

@php-wasm/universal contains the runtime pieces shared by @php-wasm/node, @php-wasm/web, and the Playground client packages.

Most applications should start with loadNodeRuntime() from @php-wasm/node or loadWebRuntime() from @php-wasm/web. Use this package directly when you need the lower-level PHP request handler, filesystem helpers, or extension staging primitives.

PHP extension manifests

External PHP extensions are loaded before PHP starts. They are supported in JSPI runtimes only. A manifest lets a package publish one extension name with artifacts for the PHP version matrix:

{
	"name": "wp_mysql_parser",
	"version": "0.1.0",
	"artifacts": [
		{
			"phpVersion": "8.4",
			"sourcePath": "wp_mysql_parser-php8.4-jspi.so"
		}
	]
}

sourcePath may be absolute, or relative to the manifest URL. If you pass an inline manifest instead of manifestUrl, pass baseUrl to choose where relative artifact files are resolved from.

Asyncify extension loading is reserved for bundled extensions shipped with the PHP.wasm packages, such as intl, xdebug, redis, and memcached.

Lower-level extension staging

resolvePHPExtension() turns bytes, a direct artifact URL, or a manifest into a ResolvedPHPExtension. withResolvedPHPExtensions() then augments Emscripten options so the extension .so, generated .ini, sidecar files, and environment variables are ready before PHP scans its .ini files. When loadWithIniDirective is false, the .so and sidecar files are still staged but no .ini file or PHP_INI_SCAN_DIR entry is generated.

import { resolvePHPExtension, withResolvedPHPExtensions } from '@php-wasm/universal';

const extension = await resolvePHPExtension({
	phpVersion: '8.4',
	source: {
		format: 'manifest',
		manifestUrl: new URL('https://cdn.example.com/wp_mysql_parser/manifest.json'),
	},
});

const emscriptenOptions = withResolvedPHPExtensions({}, [extension]);

Direct bytes skip URL resolution:

await resolvePHPExtension({
	phpVersion: '8.4',
	name: 'wp_mysql_parser',
	source: { format: 'so', bytes },
});