Description
Composition provides a lightweight and generic API, that you can use to check your
environment at runtime, instead of manually go checking for regex in constants,
classes/functions existence, matching a version against a class constant, ...
It only works when using Composer as package management tool.
Composition alternatives and similar libraries
Based on the "Dependency Management Extras" category.
Alternatively, view Composition alternatives based on common mentions on social networks and blogs.
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Satis
Simple static Composer repository generator - For a full private Composer repo use Private Packagist -
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Workflow
Declarative workflow engine for PHP with automatic dependency resolution, sync/async job execution, and type-safe response chaining. -
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Composed
Easily parse your project's Composer configuration, and those of its dependencies, at runtime -
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SaaSHub - Software Alternatives and Reviews
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README
Composition 
Composition provides a lightweight and generic API, that you can use to check your environment at runtime, instead of manually go checking for regex in constants, classes/functions existence, matching a version against a class constant, ...
It only works when using Composer as package management tool.
Some examples
A single command to check your PHP environment :
if (!\Composition::has('vendor/super-package', '>=2.0') {
$this->markTestSkipped('The following tests require "SuperPackage" to be at least at 2.0');
}
\Composition::has('php', '5.4.*');
\Composition::has('ext-mongo');
Check the platform :
if (\Composition::isWindows()) {
// ...
}
Note
This tool should mostly be used in your unit tests, and not be abused in production.