PHPantom

A fast, lightweight PHP language server written in Rust. Ready in seconds, uses a fraction of the RAM other language servers need, and stays responsive throughout. No indexing phase, no waiting.

Check out the documentation to get started.

Note

PHPantom is in active development. The core editing features are solid and used daily on production codebases.

Features

PHPantom focuses on deep type intelligence. Here's how it compares:

	PHPantom	Intelephense	PHP Tools	Phpactor	PHPStorm
Common LSP features1	✅	✅	✅	✅	✅
Workspace symbols	✅	✅	✅	✅	✅
Call hierarchy	❌	❌	❌	❌	✅
Semantic tokens	✅	❌	✅	❌	✅
Linked editing	✅	❌	✅	❌	✅
Extras2	✅	💰	🚧	🚧	✅
Diagnostics
PHPStan integration	✅	❌	❌	🚧	🚧
Undefined variable	✅	💰	✅	✅	✅
Type errors	✅	💰	✅	🚧	✅
Unused variable	✅	❌	✅	❌	✅
Type Intelligence
Generics / @template	✅	🚧	✅	🚧	✅
@mixin completion	✅	💰	✅	✅	🚧
Array / object shapes	✅	✅	✅	🚧	🚧
PHPStan types	✅	❌	🚧	🚧	🚧
Conditional return types	✅	❌	✅	🚧	❌
Closure parameter inference	✅	🚧	🚧	🚧	🚧
Laravel	✅	❌	🚧	❌	🚧
Blade templates	🚧	❌	✅	❌	✅
Other frameworks4	🚧	🚧	🚧	🚧	🧩
Refactoring
Rename	✅	💰	💰	✅	✅
Common refactorings3	✅	❌	💰	✅	✅
Extract constant	✅	❌	❌	✅	✅
Extract interface	✅	❌	❌	✅	✅
Promote constructor parameter	✅	❌	❌	❌	✅
Simplify expressions	✅	❌	💰	❌	✅
Modernize syntax5	✅	❌	💰	❌	✅
Performance
Time to ready	5 s	1 min 25 s	3 min 17 s	15 min 39 s	17 min 55 s
RAM usage	360 MB	520 MB	3.9 GB	498 MB	1.7 GB
Disk cache	0	45 MB	0	4.1 GB	551 MB

_{🚧 = partial support. 🧩 = requires plugin. 💰 = paid tier.
¹ Completion, hover, signature help, go-to-definition, find references, diagnostics, document symbols.
² Auto-import, go-to implementation / type-definition, smart select, folding ranges, formatting, code lens, inlay hints, type hierarchy, document links.
³ Implement interface methods, extract method/function, extract/inline variable, generate constructor, generate getter/setter.
⁴ CakePHP, non-Composer WordPress, Symfony, Behat, PHPUnit, and Prophecy, and Twig.
⁵ Convert between arrow functions and closures, and switch statements to match expressions.
Performance measured on a production codebase: 21K PHP files, 1.5M lines of code (vendor + application). Time to ready is CPU time consumed until full type intelligence is available on a cold start (first index); tools with a disk cache launch faster on subsequent starts.}

Want to verify? Open examples/demo.php in your editor and trigger completion at the marked locations. It exercises every type intelligence feature in the table, including edge cases where tools diverge. For Laravel specifically, open examples/laravel/ — a standalone project with real Eloquent models, config, routes, views, and translations that exercises Eloquent property resolution, query builder chaining, scopes, custom collections, and go-to-definition for config keys, route names, and translation strings.

Context-Aware Intelligence

• Smart PHPDoc completion. @throws detects uncaught exceptions in the method body, @param pre-fills from the signature, and tags are filtered to context and never suggested twice.
• Array shape inference. Literal arrays offer key completion with no annotation. Nested shapes, spreads, and array functions like array_map preserve element types.
• Closure parameter inference. $users->map(fn($u) => $u->name) infers $u as User from the collection's generic context.
• Conditional return types. PHPStan-style conditional @return types resolve to the concrete branch at each call site.
• Type aliases and shapes. @phpstan-type, @phpstan-import-type, and object{...} shapes all resolve through to completions.
• Laravel. Eloquent relationships, scopes, accessors, casts, and Builder chains resolve end-to-end. Macros behave like real methods. Container strings like app('cache') resolve to the bound class, auth()->user() resolves to your configured model, and query string compleation on both relation and column names. Blade templates get completion, hover, go-to-definition, and diagnostics through virtual PHP preprocessing. No ide-helper or database access required.
• Everything else you'd expect. Generics, type narrowing, named arguments, destructuring, first-class callables, anonymous classes, @deprecated detection, and namespace segment drilling.

Project Awareness

PHPantom understands Composer projects out of the box, but works without setup on non-Composer projects too:

• Autoloader-accurate results. Completions and go-to-definition only surface classes that Composer's autoloader can actually load, avoiding false positives from internal, inaccessible, or duplicate vendor classes. You see exactly what your application can use.
• PSR-4 correctness. Qucik fixes for when the namespace or class name does not match their PSR-4 path.
• PSR-4 autoloading. Resolves classes across files on demand.
• Classmap and file autoloading. autoload_classmap.php and autoload_files.php.
• Embedded PHP stubs from phpstorm-stubs bundled in the binary, no runtime downloads needed.
• Drupal project support. Detects Drupal projects via composer.json, resolves the web root, and indexes Drupal-specific directories and PHP extensions (.module, .install, .theme, etc.) with .gitignore bypassed so that Composer-managed core and contrib code is always available.
• require_once discovery. Functions from required files are available for completion.
• Go-to-implementation. Jump from an interface or abstract class to all concrete implementations. Scans open files, classmap, PSR-4 directories, and embedded stubs.
• Workspace-wide diagnostics. After startup, diagnostics run in the background across every file in the project, not just the ones you have open, so problems are already visible when you navigate to a file. Configured external tools (PHPStan, PHPCS, Mago) run project-wide too, once the background pass finishes. Both are deferred until after startup so they never slow down time to ready.

Acknowledgements

PHPantom stands on the shoulders of:

• Mago: the PHP parser that powers all of PHPantom's AST analysis.
• PHPStan and Psalm: for their pioneering work in PHP static analysis and shaping the type ecosystem. PHPantom builds on PHPStan-informed type experience, with full support for @phpstan-* annotations.
• JetBrains phpstorm-stubs: type information for the entire PHP standard library, embedded directly into the binary.
• Phpactor: the PHP language server whose comprehensive test suite and benchmark fixtures informed PHPantom's own test coverage. Many of PHPantom's type inference fixtures were adapted from Phpactor's reflection tests.

License

MIT. See LICENSE.