PHP is a powerful programming language that enables developers to create dynamic and interactive websites. In this tutorial, we will be discussing classes, properties, and methods in PHP.
Classes are a way of grouping related functions together. In PHP, a class is defined by the keyword class followed by the name of the class. The class definition is placed in a file with the same name as the class, and the file must be placed in a directory that is included in the include path.
Classes can have properties and methods. Properties are variables that are associated with a class. Methods are functions that are associated with a class. To access a property or method, you use the name of the class followed by a dot (.) and the name of the property or method.
For example, the following code defines a class called Employee. The class has two properties, name and salary, and one method, getSalary.
class Employee {
private $name;
private $salary;
public function getName() {
return $this->name;
}
public function getSalary() {
return $this->salary;
}
}
The following code uses the Employee class.
$employee = new Employee();
$employee->name = “John”;
$employee->salary = 50000;
echo $employee->getName();
echo $employee->getSalary();
The output of the code will be John and 50000.
Classes can be extended. This means that a class can inherit the properties and methods of another class. For example, the following code defines a class called Employee that extends the class called Person.
class Employee extends Person {
}
The Employee class will inherit the properties and methods of the Person class.
