php child class constructor

<?php class BaseClass { function __construct() { print "In BaseClass constructor\n"; } } class SubClass extends BaseClass { function __construct() { parent::__construct(); print "In SubClass constructor\n"; } } class OtherSubClass extends BaseClass { // inherits BaseClass's constructor } // In BaseClass constructor $obj = new BaseClass(); // In BaseClass constructor // In SubClass constructor $obj = new SubClass(); // In BaseClass constructor $obj = new OtherSubClass(); ?>

child class php

<?php
class Fruit {
  public $name;
  public $color;
  public function __construct($name, $color) {
    $this->name = $name;
    $this->color = $color;
  }
  public function intro() {
    echo "The fruit is {$this->name} and the color is {$this->color}.";
  }
}

// Strawberry is inherited from Fruit
class Strawberry extends Fruit {
  public function message() {
    echo "Am I a fruit or a berry? ";
  }
}
$strawberry = new Strawberry("Strawberry", "red");
$strawberry->message();
$strawberry->intro();
?>
Example Explained
The Strawberry class is inherited from the Fruit class.

This means that the Strawberry class can use the public $name and $color properties as well as the public __construct() and intro() methods from the Fruit class because of inheritance.

The Strawberry class also has its own method: message().

Posted by: Guest on July-09-2021

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