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This article mainly introduces "what does ioc control inversion in laravel refer to". In daily operation, I believe that many people have doubts about what ioc control reversal refers to in laravel. The editor consulted all kinds of data and sorted out simple and easy-to-use operation methods. I hope it will be helpful to answer the doubt of "what ioc control inversion refers to in laravel". Next, please follow the editor to study!

In laravel, IOC control inversion is a design principle in object-oriented programming, which can be used to reduce the coupling between computer code, that is, one class gives its control to another object, and the dependency between classes is solved by this object.

This article operating environment: Windows10 system, Laravel6 version, Dell G3 computer.

What is the inversion of ioc control in laravel

Inversion of Control, abbreviated as IoC, is a design principle in object-oriented programming that can be used to reduce the coupling between computer code.

One of the most common methods is called Dependency Injection (DI), and another is called dependency lookup (Dependency Lookup). Through control inversion, when an object is created, an external entity that regulates all objects in the system passes references to the objects on which it depends.

To put it simply, one class gives its control to another object, and the dependencies between classes are solved by this object. Dependency injection belongs to the display declaration of dependency, while dependency lookup is to solve the dependency through lookup.

Inversion of control (IoC): no need to modify your own content, but to be delivered externally. Change from internal dependence to external dependence.

Control inversion (IOC): Inversion Of Control,' control is the control of the program execution process. Before the framework is used, the programmer controls the whole program execution. After using the framework, the control is reversed from the programmer to the framework.

Inject a class:

App::bind ('foo', function ($app) {return new FooBar;})

This example means to create a class aliased as foo, which is actually instantiated as FooBar.

The way to use this class is:

$value = App::make ('foo')

$value is actually a FooBar object.

If you want to instantiate the class using the singleton pattern, use:

App::singleton ('foo', function () {return new FooBar;})

In this way, the object is the same after each instantiation.

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