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Most people do not understand the knowledge points of this "php singleton pattern case analysis" article, so the editor summarizes the following content, detailed content, clear steps, and has a certain reference value. I hope you can get something after reading this article. Let's take a look at this "php singleton pattern instance analysis" article.

1. Singleton mode reduces resource waste and ensures that there is only one instance object in the whole environment, which is especially suitable for writing resource connection classes.

2. Singleton mode refers to the creation of only one resource (object, database link, etc.) to prevent external instances from being returned or objects to be returned after creation.

Example

/ / Singleton model (formula: three private and one public) class Singleton {/ / privatization construction method, prohibit external instantiation object private function _ _ construct () {} / / privatize _ clone, prevent objects from being cloned private function _ _ clone () {} / / privatize internally instantiated object private static $instance = null / / Public static instance method public static function getInstance () {if (self::$instance = = null) {/ / internally instantiated object self::$instance = new self ();} return self::$instance }} the above is about the content of this article on "php singleton pattern instance Analysis". I believe everyone has a certain understanding. I hope the content shared by the editor will be helpful to you. If you want to know more about the relevant knowledge, please follow the industry information channel.

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