What is the difference between __construct() and __destruct() in php?
The constructor is the OOPs concept in PHP. It is a method that has the same name as the class name. It is defined inside the class and is used to automatically call when the object is created. Show __construct() Method: __construct is a public magic method that is used to create and initialize a class object. __construct assigns some property values while creating the object. This method is automatically called when an object is created. Properties:
The constructor will initialize the class properties at the time of object creation. The __construct() method will be called only once when the object of the class is created. Syntax: $object_name= new class_name (argument value); Example: $subject=new computer(“English”); Syntax: function __construct() { // Initialize the object properties } Approach:
Default Constructor: In default constructor, the __construct() method has no parameters. The values passed to the default constructor are default. Example: Let us take the example of a class “student” that will display a simple message for this class, We will define a constructor without a parameter. Constructor without parameter: PHP
Output: This is __construct without parameter Welcome To GeeksforGeek Constructor with parameter: Example 2: Let us take another example of a class “student” who has two properties “name” and “surname“. For this class, we will define a constructor with a parameter that will initialize class properties when the object is created. PHP
Output: My name is john Surname is biber PHP Destructor: PHP Destructor method is used to destroy objects or release their acquired memory. A destructor is called automatically when the object is created. Usually, it is called at end of the script. The destructor method does not take any arguments, The destructor does not return any data type. This all process is handled by Garbage Collector. Properties:
Syntax: function __destruct() { // Destroy objects or release memory. } Example: PHP
Output: This is a constructer Object is initialized in constructer This is destruct Object is destroyed in destructor Example: Now, let us take an example of a “class” student who has three properties “name”, “surname”, and “favorite website”. For this class, we will define a constructor with a parameter and the destructor will destroy the initialized object. PHP
Output: My name is John Surname is Biber My favorite website is Geeksforgeek Successfully object Destroyed Example: Let us create a class “MyClass”. In the constructor, we will define a new class property and destroy them in the destructor. PHP
Output: You are in constructor You are in destructor Just Destroyed MyClass Object Conclusion: In the real world, constructors and destructs are very useful as they space in memory. They allow the reusability of code. Overall they are very useful. What is difference between constructor and destructor in PHP?You can say that the Constructors are the blueprints for object creation providing values for member functions and member variables. Once the object is initialized, the constructor is automatically called. Destructors are for destroying objects and automatically called at the end of execution.
What is difference between constructor and destructor?Constructor helps to initialize the object of a class. Whereas destructor is used to destroy the instances.
What is __ construct in PHP?PHP - The __construct Function
A constructor allows you to initialize an object's properties upon creation of the object. If you create a __construct() function, PHP will automatically call this function when you create an object from a class. Notice that the construct function starts with two underscores (__)!
What is __ destruct in PHP?PHP - The __destruct Function
A destructor is called when the object is destructed or the script is stopped or exited. If you create a __destruct() function, PHP will automatically call this function at the end of the script. Notice that the destruct function starts with two underscores (__)!
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