How object oriented programming is implemented in php?
What is OOPs?Object Oriented is an approach to software development that models application around real world objects such as employees, cars, bank accounts, etc. A class defines the properties and methods of a real world object. An object is an occurrence of a class. Show
The three basic components of object orientation are;
Object Oriented Programming PrinciplesThe three major principles of OOP are;
OOPs Concepts in PHPPHP is an object oriented scripting language; it supports all of the above principles. The above principles are achieved via;
Now that we have the basic knowledge of OOP and how it is supported in PHP, let us look at examples that implement the above principles What is UML?Unified Modeling Language UML is a technique used to design and document object oriented systems. UML produces a number of documents, but we will look at the class diagram which is very important to object oriented php programming. Class Diagram Example Class Diagram Key
How to Create a class in PHPThe class keyword is used to define a class in PHP. Below are the rules for creating a class in PHP. Có thể bạn quan tâm
Let’s say we want to create a class for representing animals. We will start with identifying the features that are common to all animals.
The diagram below shows the diagram for the animal Let’s now code our animal class family = $family; $this->food = $food; } public function get_family() { return $this->family; } public function set_family($family) { $this->family = $family; } public function get_food() { return $this->food; } public function set_food($food) { $this->food = $food; } } ?> HERE,
How implement Inheritance in PHPWe will work with a cow and a lion. Both the cow and lion inherit from the Animal class. The class diagram below shows the relationships. Note the cow inherits from the animal class and defines its own variable and methods too. Let’s now code the Cow class owner = $owner; } public function get_owner() { return $this->owner; } } ?> Let’s now code the Lion class HERE,
How to Create object of the classThe Animal, Cow, and Lion classes should all be in the same directory for simplicity’s sake. Let’s now create the application that uses our classes. PHP Class Example Cow Object Testing our applicationLet’s now view our application in a web browser . Fantastic right! Let’s now look at the third principle of OOP, polymorphism. Let’s say we want to develop an application that connects to different database engines such as MySQL and SQL Server but use the same uniform interface. We can create an interface that defines the standard methods and an abstract class that implements the common methods.
The class diagram below illustrates the relationship among our abstract class, interface, and implementation classes. Let’s now create our abstract class host = $host; $this->db = $db; $this->uid = $uid; $this->password = $password; } } ?> HERE,
Let’s now create the interface that contains the standard methods which will be implemented differently depending on the database engine. HERE,
Let’s now create the concrete classes that will extend the DBCommonMethods class and extend the DBInterface interface. MySQLDriver.php MSSQLServerDriver.php HERE,
Usage of the above code The code using the above class would look like this Or The rest of the code would be the same for both drivers such as; db_connect(); $db->insert($data); ?> Summary
How object oriented programming be implemented in PHP explain with an example?PHP What is OOP? OOP stands for Object-Oriented Programming. Procedural programming is about writing procedures or functions that perform operations on the data, while object-oriented programming is about creating objects that contain both data and functions.
How object oriented programming is implemented?Object-oriented programming aims to implement real-world entities like inheritance, hiding, polymorphism, etc in programming. The main aim of OOP is to bind together the data and the functions that operate on them so that no other part of the code can access this data except that function.
How PHP is an objectPHP is an object-oriented programming language that supports several concepts. Some of them are as follows: Class and objects– Class is a programmer-defined data type, including local variables and local methods. It is also a collection of objects, while objects have similar properties and behaviours.
Can PHP be implemented using OOP style?PHP - What is OOP? From PHP5, you can also write PHP code in an object-oriented style. Object-Oriented programming is faster and easier to execute.
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