How to understand PHP proxy mode

This article mainly usesexample codeto introducePHP proxy modein detail.

In the previous article, we have given you a brief introduction to the basic concepts ofPHP proxy mode. I believe everyone also has a little understanding of the proxy mode.

This section will introduce you toPHP proxy modebased on specific code examples.

The code is as follows:

go(); $CDshop = new CDshop; $CDshop->buy($title); } public function go() { echo "跑去香港代购" . PHP_EOL; } } class client { public static function shoping($goods) { $proxy = new Proxy; $proxy->buy($goods); } } client::shoping("醒着做梦");

First of all, the proxy mode needs to inherit a common interface. There are only two classes: CDShop (CD store) and Proxy (CD proxy). To inherit a common interface shop, and all of them have a common method buy.

Then we can understand the above code in this way. When we want to buy a "Waking and Dreaming" record, but because there are no local resources, we can only choose a Hong Kong agent to help purchase it. Here we can instantiate the proxy Proxy through the client, and then call the purchase method buy in the proxy.

Then the agent can use the go method to express "go to Hong Kong to purchase", then new instantiate CDshop, and then use the buy method to "buy records".

Finally we can check the return value of the above code:

Process diagram:

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