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Today, I would like to share with you what the php command mode is and how to use the relevant knowledge points, the content is detailed, the logic is clear, I believe most people still know too much about this knowledge, so share this article for your reference, I hope you can get something after reading this article, let's take a look at it.

1. Encapsulate the request into an object that allows different requests to be used to parameterize the customer. Request is queued or logged, and undoable actions are supported.

2. Compose command abstract class, concrete command class and so on.

Command abstract class, which is used to declare the interface that performs the operation.

The specific command class binds a receiver object to an action and invokes the corresponding operation of the receiver.

The sender of the command asks the command to execute the request.

The command receiver knows how to perform operations related to the execution of a request, and any class can act as a receiver.

Client code to create a specific command object and set its recipient.

Example

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