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PHP Object-Oriented PHP Basics (Retired) Inheritance, Interfaces, and Exceptions Final Challenge

Jeffrey Cunningham
Jeffrey Cunningham
5,592 Points
Posted by Jeffrey Cunningham
Jeffrey Cunningham
5,592 Points

Help me complete the fish challenge please.

I'm at the part where it says to "Add a getinfo method to your Trout class that returns a string containing the common_name. flavor, record_weight, and species properties."

It wont let me pass. I think it has something to do with how I am concatenating the string.

Here is my code:

class Fish
{
    public $common_name;
    public $flavor;
    public $record_weight;

    function __construct($name, $flavor, $record){
        $this->common_name = $name;
        $this->flavor = $flavor;
        $this->record_weight = $record;
    }

    public function getInfo() {
        $output  = "The {$this->common_name} is an awesome fish. ";
        $output .= "It is very {$this->flavor} when eaten. ";
        $output .= "Currently the world record {$this->common_name} weighed {$this->record_weight}.";
        return $output;
    }
}

class Trout extends Fish 
{

  public $species;

  function __construct($name, $flavor, $record, $species) {
    parent::__construct($name, $flavor, $record);
     $this->species = $species;

  }

    public function getinfo(){
      return $species . $name . " tastes " . $flavor . " The record held is " . $record; 
    }
}

$brook_trout = new Trout("Trout", "Delicious", "14 pounds 8 ounces", "Brook");

?>```

1 Answer

Joedy Felts
Joedy Felts
3,981 Points

Hi Jeffrey, I put your code into a workspace and played around with it for a bit.

What's happening is the getInfo() method is returning the construct function argument names ($species, $name, $flavor, $record). But those arguments are only accessible/usable from INSIDE the construct function. The construct functions are assigning values to the public properties of the Fish and Trout classes (i.e., $common_name, $flavor, $record_weight, $species).

So when you created your $brook_trout object instance at the bottom, you were assigning values to those class properties. And because Trout is an extension of Fish, it then inherits all of the public properties of Fish. So the way you access those properties is by using $this. So $species becomes $this->species; $name changes to $this->common_name; $flavor to $this->flavor; and $record to $this->record_weight. See the code block below. That seemed to work for me when I tested it out, so with that change you SHOULD pass the challenge.

public function getinfo(){
      return $this->species . " " . $this->common_name . " tastes " . $this->flavor . ". The record held is " . $this->record_weight; 
    }
Jeffrey Cunningham
Jeffrey Cunningham
5,592 Points
Jeffrey Cunningham
Jeffrey Cunningham
5,592 Points

Thank you so much! I'm still trying to wrap my head around exactly what just happened there but it worked. I was stuck on that for weeks!