laravel-interfaces-and-di

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Original

English

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Translation

Chinese

Interfaces and Dependency Injection

接口与依赖注入

Define narrow interfaces and inject them where needed. Bind concrete implementations in a service provider.

php

interface Slugger { public function slug(string $s): string; }

final class AsciiSlugger implements Slugger {
  public function slug(string $s): string { /* ... */ }
}

$this->app->bind(Slugger::class, AsciiSlugger::class);

Benefits: easier testing (mock interfaces), clearer contracts, swap implementations without touching consumers.

定义窄接口并在需要的位置注入它们。在服务提供者中绑定具体实现。

php

interface Slugger { public function slug(string $s): string; }

final class AsciiSlugger implements Slugger {
  public function slug(string $s): string { /* ... */ }
}

$this->app->bind(Slugger::class, AsciiSlugger::class);

优势：更易测试（可模拟接口）、更清晰的契约、无需修改消费者即可替换实现。