Protected Properties in OOP in PHP
PHP also supports protected properties.
They are also declared using the protected modifier.
Such properties are inherited and accessible
in child classes.
Let's create a parent class with a protected property containing age:
<?php
class User {
protected $age;
public function setAge($age) {
$this->age = $age;
}
public function getAge() {
return $this->age;
}
}
?>
In the child class, let's create a method that increments the age by one:
<?php
class Student extends User {
public function incAge() {
$this->age++;
}
}
?>
Rewrite the following code using a protected property:
<?php
class User {
private $name;
public function setName($name) {
$this->name = $name;
}
public function getName() {
return $this->name;
}
}
class Employee extends User {
public function setName($name) {
if (strlen($name) > 0) {
$this->name = $name;
}
}
}
?>
