PHP construct() function introduction and detailed explanation of usage

The prototype mode is a creator mode, which is characterized by "copying" an existing instance to return a new instance instead of creating a new instance. This article will provide a detailed explanation of the prototype mode with examples. I hope it will be helpful to everyone. The main roles in the prototype pattern: Abstract prototype (Prototype) role: declares an interface that clones itself. Concrete Prototype (Concrete Prototype) role: implements an operation of cloning itself. When most of a class is the same and only part is different, if necessary For a large number of objects of this class, it is very expensive to repeatedly instantiate the same parts every time. However, if you clone the same parts of the object before, you can save the cost. One implementation method for PHP is to handle the initialization of this class separately with the __construct() and initialize functions. The prototype is placed in construct, which is the public part, and the special part of each object is placed in initialize. In this way, we first create a class without initializing it, and then initialize it every time we clone the class. &

1. php Constructor Prototype Pattern Detailed explanation of prototype pattern

Introduction: Prototype mode is a creator mode, which is characterized by returning a new instance by "copying" an existing instance instead of creating a new instance. This article will provide a detailed explanation of the prototype mode with examples. I hope it will be helpful to everyone.

2. JavaScript returns the property constructor that references the Date function that created this object

Introduction: This article introduces it in detail JavaScript returns the attribute constructor that references the Date function that created this object, which has certain reference value. Let’s take a look at it together!

3. JavaScript returns a reference to the array function that created this object. The attribute constructor

Introduction: This article introduces it in detail JavaScript returns the reference attribute constructor to the array function that created this object, which has certain reference value. Let’s take a look below!

4. The underscore before the Php constructor construct is a double underscore

Introduction: When writing a PHP class recently , I always encounter the error of function non object. I know that the class is not instantiated, but I just don’t know where the error is.

5. The constructor __CONSTRUCT() and destructor __DESTRUCT() in php use

Introduction: Class definition in PHP is similar to that in Java, but the constructor in PHP is different. In PHP, the constructor uses __construct() (two underscores), This ensures that you don't have to change the constructor name when changing the class name. It also has a destructor function __destruct(), which is used to destroy instances and release resources. Once you define a class, you can use new to create an instance of the class. The definition of the class is the blueprint, and the instances are the components placed on the assembly line. New takes the name of the class and returns an instance of the class.

6. 10 recommended articles about construct

##Introduction: When you see this name, it gives you a very high-end feeling. Yes, magic methods are indeed advanced. So, what is a magic method? In PHP, methods starting with two underscores are called "Magic methods". For example, __construct(), __destruct (), __clone(), and __call(),,__get(), __set(),__sleep(), __wakeup(), __toS...

7. About _construct() method instance summary

Introduction: This article mainly introduces the difference between the constructor _construct() and _initialize() of the class in ThinkPHP. The introduction in the article is very detailed. I believe it has certain reference value for everyone. Friends who need it Let’s take a look together below. Preface I believe that PHPers who are familiar with THINKPHP are basically familiar with the _initialize() method. It seems that we rarely use _construct() unless we write a plug-in ourselves, otherwise it is really rarely used. Looking at the code today, I suddenly saw _construc...

##8. 10 recommended articles about the php __construct() function

Introduction: When you see this name, it gives you a very high-end feeling. Yes, magic methods are indeed advanced. So, what is a magic method? In PHP, methods starting with two underscores are called "Magic methods". For example, __construct(), __destruct (), __clone(), and __call(),,__get(), __set(),__sleep(), __wakeup(), __toS...

9. Details the difference between the constructor _construct() and _initialize() of the class in ThinkPHP

Introduction: This article mainly introduces the difference between the constructor _construct() and _initialize() of the class in ThinkPHP. The introduction in the article is very detailed. I believe it will be a reference for everyone. Value, friends in need come and take a look below.

10. The difference between PHP language constructs (Language constructs) and functions

Introduction: I believe you often see comparisons in some PHP applications, saying that isset() is used to replace strlen(), isset executes faster than strlen, etc. Example: If ( isset($username[5]) ) { // The username is at least six characters long. } The reason is that isset is a language structure, and strlen is a function...

11. PHP magic method: __construct __destruct

Introduction:: This article mainly introduces the PHP magic method: __construct __destruct, if you are interested in PHP tutorials Students can refer to it.

12. Constructor Prototype Pattern Prototype Pattern (PHP example)

Introduction:: This article mainly introduces Constructor Prototype Pattern prototype pattern (PHP example), students who are interested in PHP tutorials can refer to it.

13. __construct and __initialize

## Introduction:: This article mainly introduces __construct and __initialize , students who are interested in PHP tutorials can refer to it.

14.

Explain _initialize and __construct from ThinkPHP source code construct 2 tutorial construct 2 crack the Chinese version failed to initializ

##Introduction: initialize, construct: Explain _initialize and __construct from the ThinkPHP source code: data-id="1190000004890761"> Recently I am learning the ThinkPHP framework and see The _initialize() function is just the right time to make a short summary. After briefly reading the tutorials on Google and Baidu, I felt that there was a lot of talk, all of which were being tested, but none of them got to the point~ Experimental version: ThinkPHP 3.2.3, PHP5. 6. The _initialize() function appears so that we can call the constructors of the parent class and the subclass at the same time in the subclass. Want to understand the simplest way

15.

constructor Php The underscore before the constructor construct is double_

Introduction: constructor:constructor Php constructor The leading underscore of construct is double_: Definition and usage The __construct() function creates a new SimpleXMLElement object. If successful, the function returns an object. If failed, returns false. Syntax __construct(data, options, is_url, ns, is_prefix) Parameter description data is required. A well-formed XML string or the path or URL of an XML document. options are optional. Specifies additional Libxml parameters. is_url

##16. Php constructor The leading underscore of construct is double__PHP tutorial

Introduction: Php construct The leading underscore of the function construct is a double _. Definition and Usage The __construct() function creates a new SimpleXMLElement object. If successful, the function returns an object. If failed, returns false. Syntax __constru

17. __construct(), __destory(), __get(), __set(), __call(),_PHP tutorial in PHP

Introduction: __construct(), __destory(), __get(), __set(), __call(), in PHP. (1) __construct() is PHP's built-in constructor, which is automatically called by the PHP parsing engine. When an object is instantiated, this method of the object is first called. Example: c

18. __construct constructor usage_PHP tutorial

Introduction: __construct constructor usage. __construct The constructor class will be executed when it is instantiated. construct A custom function or method. ?php class myName{ function __con str uct($myName){ //Two consecutive underscores echo (I

19. PHP magic method __construct __destruct (1), phpdestruct_PHP tutorial

##Introduction: PHP magic method __construct __destruct (1), phpdestruct. PHP magic method __construct __destruct (1), phpdestruct __construct() - Call this method __destruct() first every time you create a new object - all of the objects

20.

Usage analysis of __initialize() and class constructor __construct() in ThinkPHP, thinkphp constructor_PHP tutorial

Introduction: Usage analysis of __initialize() and class constructor __construct() in ThinkPHP, thinkphp constructor. Usage analysis of __initialize() and class constructor __construct() in ThinkPHP, example analysis of thinkphp constructor in this article __initialize() and class constructor __construct() in ThinkPHP. Points

##21.

Constructor Prototype Pattern prototype pattern (PHP example), prototypepattern_PHP tutorial

##Introduction: Constructor Prototype Pattern prototype pattern (PHP example), prototypepattern. Constructor Prototype Pattern prototype pattern (PHP example), prototypepattern When most of a class is the same, only part of it is At different times, if you need a large number of objects of this class

22. php example detailed explanation of Constructor Prototype Pattern prototype pattern, prototypepattern_PHP tutorial

Introduction: PHP example detailed explanation of Constructor Prototype Pattern prototype pattern, prototypepattern. PHP example detailed explanation of Constructor Prototype Pattern Prototype pattern, prototypepattern The main role in the prototype pattern Abstract prototype (Prototype) role: declare an interface to clone oneself Concrete prototype