PHP get variable of parent class

Question

I'm trying OO in PHP. I think I understand what goes wrong but I don't understand how to fix it.

class Name {
   public $_firstname;
   public $_lastname;

   public function setName($firstName, $lastName){
       $this->_firstname = $firstName;
       $this->_lastname = $lastName;                
   }

   public function getName(){
       echo 'The full name is '. $this->_firstname. ' ' . $this->_lastname .'<br>';
   }

}
class Description extends Name{
    public $_desciprion;

    public function setDescription($description){
        $this->_desciprion = $description;
    }
    public function getDescription(){
        echo $this->_desciprion. ' is written by '.$this->_firstname .'<br>';
    }
}

$firstNames = array("some", "another", "john");
$lastNames = array("body", "body", "doe");
$descriptions = array("description 1", "description 2", "description 3");



for ($i=0; $i < count($firstNames); $i++){
    $name = new Name();
    $name->setName($firstNames[$i], $lastNames[$i]);

    $description = new Description();
    $description->setDescription($descriptions[$i]);

    echo $description->getDescription();
}

I want to echo the $description containing the $_firstname of the Name class.

I don't really know the OO way to fill it.

Thoughts?

Answer 1

In your case $name is completely unrelated to $description . However, this is easily fixed:

for ($i=0; $i < count($firstNames); $i++){
    $description = new Description();
    $description->setName($firstNames[$i], $lastNames[$i]);
    $description->setDescription($descriptions[$i]);

    echo $description->getDescription();
}

Bonus improvement:

foreach ($firstNames as $i => $firstName){
    $description = new Description();
    $description->setName($firstName, $lastNames[$i]);
    $description->setDescription($descriptions[$i]);

    echo $description->getDescription();
}

Answer 2

for ($i=0; $i < count($firstNames); $i++){
    $description = new Description();
    $description->setName($firstNames[$i], $lastNames[$i]);
    $description->setDescription($descriptions[$i]);

    echo $description->getDescription();
}

Answer 3

You are setting the name to another instance ( $name ) in order to set the name to the description object you have to write:

for ($i=0; $i < count($firstNames); $i++){

    $description = new Description();
    $description->setName($firstNames[$i], $lastNames[$i]);
    $description->setDescription($descriptions[$i]);

    echo $description->getDescription();
}