Question 1

How to inject an interface implementation with Auryn?

Accepted Answer

Use the alias() method to map an interface to a concrete class globally, or define() for specific parameter mappings. For example, $injector->alias('Engine', 'V8') injects V8 instances wherever Engine is type-hinted, as shown in the Car example.

Question 2

Auryn vs PHP-DI: which is better for PHP?

Accepted Answer

Auryn emphasizes strict constructor injection and avoids Service Locators, ideal for clean, testable code. PHP-DI offers more features like auto-wiring with annotations and configuration files, but might encourage anti-patterns. Choose Auryn for DI purity, PHP-DI for convenience and advanced tooling.

Question 3

How to share a database connection in Auryn without Singletons?

Accepted Answer

Use the share() method to mark a PDO instance or class as shared. For example, $injector->share($pdo) ensures the same PDO object is injected wherever PDO is type-hinted, avoiding Singleton anti-patterns, as demonstrated in the DataMapper example.

Question 4

Can Auryn handle scalar dependencies like strings or integers?

Accepted Answer

Yes, by prefixing parameter names with a colon in define() calls to indicate raw values. For instance, $injector->define('PDO', [':dsn' => 'mysql:...']) injects the string directly without class instantiation, as detailed in the non-class parameters section.

Question 5

How to inject dependencies into a static method using Auryn?

Accepted Answer

Use the execute() method with the static method callable. For example, $injector->execute('MyClass::myStaticMethod') will automatically provision and inject dependencies based on the method's parameters, as shown in the injecting for execution examples.

Question 6

What are the performance implications of Auryn's reflection?

Accepted Answer

Auryn caches reflection results to minimize performance hits, but reflection is still slower than direct instantiation. For most applications, the overhead is negligible, but in performance-critical loops, consider using delegates or caching instances, as noted in the README.

Auryn

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