Releases

PXP

PXP is a project that adds syntax on top of PHP and compiles the result to PHP. Tyhp is also a superset of the PHP language that compiles to PHP. The two differ in scope, approach, and focus.

Note

PXP is no longer under active development. Its author announced the end of the project in March 2025 and archived the repository.

What PXP Is

PXP (pxp-lang) is an open-source project that provides a Rust-based parser and compiler for an extended PHP syntax. It began as a high-performance PHP parser and has grown into a language project that adds features like generics to PHP. PXP's tooling infrastructure — parser, AST, and formatter — is written in Rust, giving it strong performance characteristics for parsing and analysis.

Similarities

  • Both are supersets of the PHP language that compile to PHP
  • Both aim to add features that PHP currently lacks
  • Both support generics as a key language addition
  • Both produce standard PHP output that runs on any PHP runtime

Differences

  • Tyhp's primary focus is a comprehensive, enforced type system — every variable, parameter, property, and return type must be typed. PXP focuses on adding syntax features without requiring types everywhere.
  • Tyhp includes a compile-time type checker. PXP's type handling is more limited in scope.
  • Tyhp provides Tyhpdef files for describing external PHP libraries and Composer packages with full type information, similar to TypeScript's .d.ts files.
  • Tyhp includes a runtime library (tyhp/core, tyhp/async, tyhp/decimal, tyhp/lambda) for features that require runtime support.
  • Tyhp adds a broader set of language features beyond generics: structs, operator overloads, conversion operators, extension methods, async/await, disposables, expression trees, and more.
  • Tyhp's compiler is written in C# (.NET), while PXP's tooling is written in Rust.
  • Tyhp includes a linter (tyhp lint), a language server (tyhp language_server), and sourcemap debugging (build.generateSourcemap with tyhp xdebug_proxy).

Complementary Strengths

PXP's Rust-based parser is aimed at PHP-adjacent tooling. Tyhp is a language with a type checker, compiler pipeline, runtime packages, and development tools. Both compile to PHP.