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PHP Extending Object-Oriented PHP Extending the Family Sibling Relationships

Mohammed Jammeh
Mohammed Jammeh
37,463 Points
Posted by Mohammed Jammeh
Mohammed Jammeh
37,463 Points

Extending Constructor Method from Parent Class in OOP

Hi, I have been struggling with this for a while and any help will be useful. The instruction states: 'Within the Client class, extend the constructor method from the parent to allow the company to be included with initialization.'

User.php 
<?php
//do not modify this file
class User {
    protected $name;
    protected $title;

    public function __construct($name = null, $title = null) {
        $this->name = $name;
        $this->title = $title;
    }

    public function __toString() {
        return $this->getSalutation();
    }

    public function getSalutation() {
        return $this->title . " " . $this->name;
    }

    public function getName() {
        return $this->name;
    }

    public function setName($name) {
        $this->name = $name;
    }

    public function getTitle() {
        return $this->title;
    }

    public function setTitle($title) {
        $this->title = $title;
    }
}
Developer.php 
<?php
//do not modify this file
class Developer extends User 
{
  protected $skills;

  public function getSkills() {
      return $this->skills;
  }

  public function setSkills($array) {
      $this->skills = $array;
  }

  public function displayUserSkills() {
      return $this->getName() . ' has the following skills: ' . implode(", ", $this->skills);
  }
}

This is my solution below but it keeps saying the company is not set and if I remove the other parameters, it does not work either.

Client.php 
<?php
class Client extends User {
  protected $company;

  public function getCompany () {
    return $this->company;
  }

  public function setCompany ($company) {
    return $this->company = $company;
  }

  public function __construct ($name, $title, $company) {
    parent::__construct($name, $title, $company);
  }

I'm quite new to OOP and any help will be very useful. Thank you :)

2 Answers

Justin Radcliffe
Justin Radcliffe
18,987 Points
Justin Radcliffe
Justin Radcliffe
18,987 Points

Hi Mohammed,

You don't need to pass $company as a parameter to the User (parent) Class constructor method as it is a unique property of Client Class. Then you need to call the setCompany method on the (current) object ($this) of the Client Class. The following code worked for me:

<?php
//add code for Client class
class Client extends User
{
protected $company;

public function __construct($name = null, $title = null, $company = null)
{      
  parent::__construct($name, $title);
  $this->setCompany($company);   
}

public function getCompany() {
      return $this->company;
  }

  public function setCompany($array) {
      $this->company = $array;
  }
}
Mohammed Jammeh
Mohammed Jammeh
37,463 Points
Mohammed Jammeh
Mohammed Jammeh
37,463 Points

Thank you very much for your answer, Junstin. It's very helpful. The fact that I can't pass the $company parameter to the User Class does make sense. I've been struggling with it for a while now haha but thank you :)

Alexandru Palita
Alexandru Palita
14,261 Points
Alexandru Palita
Alexandru Palita
14,261 Points

Add

<? php
 public function __construct ($name, $title, $company) {
    parent::__construct($name, $title);
    $this->company = $company;
  }