PHPackages                             errant/tacit - PHPackages - PHPackages  [Skip to content](#main-content)[PHPackages](/)[Directory](/)[Categories](/categories)[Trending](/trending)[Leaderboard](/leaderboard)[Changelog](/changelog)[Analyze](/analyze)[Collections](/collections)[Log in](/login)[Sign up](/register)

1. [Directory](/)
2. /
3. [Utility & Helpers](/categories/utility)
4. /
5. errant/tacit

ActiveProject[Utility & Helpers](/categories/utility)

errant/tacit
============

A Simple ByteCode VM in PHP

1.0.0-alpha(11y ago)06PHPPHP >=5.5.0

Since Oct 21Pushed 11y ago2 watchersCompare

[ Source](https://github.com/errant/tacit)[ Packagist](https://packagist.org/packages/errant/tacit)[ RSS](/packages/errant-tacit/feed)WikiDiscussions master Synced 1w ago

READMEChangelogDependenciesVersions (2)Used By (0)

Tacit
=====

[](#tacit)

[![Build Status](https://camo.githubusercontent.com/c79d7cd6d678f34f3c0984fea575b6871d206fa5cd70aae0086d07270b17dac6/68747470733a2f2f7472617669732d63692e6f72672f657272616e742f74616369742e706e673f6272616e63683d6d6173746572)](https://travis-ci.org/errant/tacit)[![Code Coverage](https://camo.githubusercontent.com/1ff45e2a9aca3ff7c5086f2466d00ab61031a4665b6c5dc98b1ffa211ea908ff/68747470733a2f2f636f6465636c696d6174652e636f6d2f6769746875622f657272616e742f74616369742f6261646765732f636f7665726167652e737667)](https://codeclimate.com/github/errant/tacit)[![Scrutinizer Code Quality](https://camo.githubusercontent.com/e50477a46cd570d4c7b84a5e395595b91a4dab3e52cb6048677698d1ad3761db/68747470733a2f2f7363727574696e697a65722d63692e636f6d2f672f657272616e742f74616369742f6261646765732f7175616c6974792d73636f72652e706e673f623d6d6173746572)](https://scrutinizer-ci.com/g/errant/tacit/?branch=master)

Tacit is:

- VM: A bytecode VM, with basic stack, memory management and interpreter
- Tac: A toy language similar in style to Assembly that comes with a lexer and compiler

Implementing a VM (and indeed a language) in PHP is silly, it's slow and limited. However, Tacit might have a purpose; for example as an educational tool.

Tacit was built with the aim of being a safe, sandboxed scripting VM for a PHP-based game. Yes, a ridiculous notion but one that works surprisingly well for simple applications.

Get Started
===========

[](#get-started)

- Clone the Repository
- Browse the examples folder
- Try an example:

```
bin/tacit examples/simple.tac

```

Future
======

[](#future)

The aim is for Tacit to expand to be more featureful, on the list is:

- Adding registers to the VM
- Expanding the Tac language with more complex commands
- The addition of a higher-level scripting language (& compiler) similar to Ruby/Python

More
====

[](#more)

- [Documentation](https://github.com/errant/tacit/wiki)

###  Health Score

21

—

LowBetter than 18% of packages

Maintenance20

Infrequent updates — may be unmaintained

Popularity4

Limited adoption so far

Community10

Small or concentrated contributor base

Maturity44

Maturing project, gaining track record

 Bus Factor1

Top contributor holds 66.7% of commits — single point of failure

How is this calculated?**Maintenance (25%)** — Last commit recency, latest release date, and issue-to-star ratio. Uses a 2-year decay window.

**Popularity (30%)** — Total and monthly downloads, GitHub stars, and forks. Logarithmic scaling prevents top-heavy scores.

**Community (15%)** — Contributors, dependents, forks, watchers, and maintainers. Measures real ecosystem engagement.

**Maturity (30%)** — Project age, version count, PHP version support, and release stability.

###  Release Activity

Cadence

Unknown

Total

1

Last Release

4226d ago

### Community

Maintainers

![](https://www.gravatar.com/avatar/2aa96643c7a457f0e3e56299b3da3efc111836e2dd1a2e83bc33a2d620baef0b?d=identicon)[errant](/maintainers/errant)

---

Top Contributors

[![errant](https://avatars.githubusercontent.com/u/9387?v=4)](https://github.com/errant "errant (2 commits)")[![scrutinizer-auto-fixer](https://avatars.githubusercontent.com/u/6253494?v=4)](https://github.com/scrutinizer-auto-fixer "scrutinizer-auto-fixer (1 commits)")

### Embed Badge

![Health badge](/badges/errant-tacit/health.svg)

```
[![Health](https://phpackages.com/badges/errant-tacit/health.svg)](https://phpackages.com/packages/errant-tacit)
```

PHPackages © 2026

[Directory](/)[Categories](/categories)[Trending](/trending)[Changelog](/changelog)[Analyze](/analyze)