PHP Inheritance - OOPs

Inheritance allows a class to inherit properties and methods from another class. This helps to reuse code and build relationships between classes.

Inheritance का मतलब है एक class दूसरी class की properties और methods को प्राप्त कर सकती है। इससे कोड reuse किया जाता है।

Example: Single Inheritance


class Employee {
  public $name;
  public $age;
  public $salary;

  function setData($name, $age, $salary) {
    $this->name = $name;
    $this->age = $age;
    $this->salary = $salary;
  }
}

class Manager extends Employee {
  function display() {
    echo "Name: $this->name
";
    echo "Age: $this->age
";
    echo "Salary: $this->salary
";
  }
}

$mgr = new Manager();
$mgr->setData("Ravi", 35, 75000);
$mgr->display();

Output:

Name: Ravi
Age: 35
Salary: 75000

Example: Multilevel Inheritance


class Employee {
  public $name;
  public $age;
  public $salary;

  function setData($name, $age, $salary) {
    $this->name = $name;
    $this->age = $age;
    $this->salary = $salary;
  }
}

class Manager extends Employee {
  public $department;

  function setDepartment($dept) {
    $this->department = $dept;
  }
}

class SeniorManager extends Manager {
  function display() {
    echo "Name: $this->name
";
    echo "Age: $this->age
";
    echo "Salary: $this->salary
";
    echo "Department: $this->department
";
  }
}

$sm = new SeniorManager();
$sm->setData("Priya", 42, 95000);
$sm->setDepartment("Finance");
$sm->display();

Output:

Name: Priya
Age: 42
Salary: 95000
Department: Finance

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