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This article mainly explains "the example code of Laravel class and interface injection". The content of the article is simple and clear, and it is easy to learn and understand. Please follow the editor's train of thought to study and learn "the example code of Laravel class and interface injection".

Laravel can automatically inject needed dependencies, which is somewhat different for custom classes and interfaces.

For classes, Laravel can be injected automatically, but for interfaces, you need to create the corresponding ServiceProvider registration interface and implement the binding of the class, and you need to add ServiceProvider to congif/app.php 's providers array, so that the container can know which implementation you need to inject.

Now customize a class myClass

Namespace App\ library

Class myClass {public function show () {echo _ _ FUNCTION__.' Hello World';}}

Set up route

Route::get ('test/ioc',' TestController@index')

Modify TestController

Class TestController extends Controller {public function index (myClass $myClass) {$myClass- > show ();}}

Visit http://localhost/test/ioc to print show Hello World successfully.

Modify myClass

Class myClass implements like {public function play () {/ / TODO: Implement play () method. Echo _ _ FUNCTION__.' Hello Play';}}

Like interface

Interface like {public function play ();}

TestController

Class TestController extends Controller {public function index (like $like) {$like- > play ();}}

If you still access the above address, you will get an error.

Target [App\ library\ like] is not instantiable.

For interface injection, we need to register in the register method of the corresponding ServiceProvider and write the corresponding ServiceProvider to the providers array of config/app.

Define LikeServiceProvider

Class LikeServiceProvider extends ServiceProvider {public function boot () {/ /} public function register () {/ / $this- > app- > bind ('App\ library\ like',' App\ library\ myClass');}}

Then we need to add LikeServiceProvider to the providers array in the config\ app.php file.

Or continue to visit the above address, the page successfully output play Hello Play.

Thank you for reading, the above is the content of "instance code of Laravel class and interface injection". After the study of this article, I believe you have a deeper understanding of the problem of Laravel class and interface injection instance code, and the specific use needs to be verified in practice. Here is, the editor will push for you more related knowledge points of the article, welcome to follow!

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