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This article mainly explains "what is the function of php singleton mode". The content of the explanation in 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 "what is the role of php singleton mode".

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 }} Thank you for your reading, the above is the content of "what is the function of php singleton mode". After the study of this article, I believe you have a deeper understanding of what the role of php singleton mode is, 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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