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thumbtack/ttinjector
====================

Construct anything using dependency injection

1.0.4(10y ago)34.1k↓16.7%MITPHPPHP >=5.4

Since Feb 13Pushed 8y ago168 watchersCompare

[ Source](https://github.com/thumbtack/ttinjector)[ Packagist](https://packagist.org/packages/thumbtack/ttinjector)[ Docs](https://github.com/thumbtack/ttinjector)[ RSS](/packages/thumbtack-ttinjector/feed)WikiDiscussions master Synced 1mo ago

READMEChangelogDependencies (1)Versions (5)Used By (0)

ttinjector
==========

[](#ttinjector)

[![Build Status](https://camo.githubusercontent.com/ab9e9851229f2abf116cc034c12d2a372558160d7dfe88f53d7bdff6db608c2a/68747470733a2f2f7472617669732d63692e6f72672f7468756d627461636b2f7474696e6a6563746f722e7376673f6272616e63683d6d6173746572)](https://travis-ci.org/thumbtack/ttinjector)

This is a simple dependency injector.

It works in two stages. First, you register all the dependencies and describe how they relate to each other. Then, you build an injector out of those dependencies that can inject the values you have added.

Installation
------------

[](#installation)

To install, use [composer](https://getcomposer.org/) and run:

```
composer require thumbtack/ttinjector

```

How to use the injector:
------------------------

[](#how-to-use-the-injector)

### 1. Create a Dependencies object:

[](#1-create-a-dependencies-object)

```
use TT\injector\Dependencies;

$dependencies = new Dependencies();
```

### 2. Add some dependencies:

[](#2-add-some-dependencies)

```
// Use register_value() to add constant values.
$dependencies->register_value('current_user_id', 12345);

// Use register_factory() to add things you don't want to construct unless used...
$dependencies->register_factory('db_connection', [], function() {
   return Database::Connect();
});

// ...Or things that have dependencies of their own.
$dependencies->register_factory(
   'users_source'
   ['db_connection'],
   function ($db) {
       return function($user_id) use ($db) {
          return $db->query('users')->where_equals('user_id', $user_id);
       };
   }
);
```

### 3. Build the injector:

[](#3-build-the-injector)

```
$injector = $dependencies->build_injector();
```

The `build_injector()` function will check to make sure there aren't any errors in the dependencies you've set up (missing dependencies or dependency cycles).

Injector objects are immutable.

### 4. Inject your dependencies!

[](#4-inject-your-dependencies)

```
function current_user($current_user_id, $users_source) {
   return $users_source($current_user_id);
}

$user = $injector->inject('current_user', ['current_user_id', 'users_source']);
```

###  Health Score

34

—

LowBetter than 77% of packages

Maintenance20

Infrequent updates — may be unmaintained

Popularity27

Limited adoption so far

Community15

Small or concentrated contributor base

Maturity61

Established project with proven stability

 Bus Factor1

Top contributor holds 100% 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

Every ~198 days

Total

3

Last Release

3716d ago

### Community

Maintainers

![](https://www.gravatar.com/avatar/7ab1782535df3a8bd3d8cd7eac5fc510bf4a53e5daac6c1d3168312ad1a7fc17?d=identicon)[jmikkola](/maintainers/jmikkola)

---

Top Contributors

[![cheston97](https://avatars.githubusercontent.com/u/4655303?v=4)](https://github.com/cheston97 "cheston97 (1 commits)")

---

Tags

foundationdependency-injection

###  Code Quality

TestsPHPUnit

### Embed Badge

![Health badge](/badges/thumbtack-ttinjector/health.svg)

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

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