CODEWITHSUNDEEP
php
Vitalik Jimbei
Vitalik Jimbei

Reputation: 141

cannot define constant in class php

I am learning php now using code academy website but some is not explained properly.

These are the conditions:

  1. Create a class called Cat.
  2. Add two public properties to this class: $isAlive ought to store the value true and $numLegs should contain the value 4.
  3. Add a public $name property, which gets its value via the __construct() or.
  4. Add a public method called meow(), which returns "Meow meow".
  5. Create an instance of the Cat class, which has the $name "CodeCat".
  6. Call the meow() method on this Cat and echo the result.

This is the code created :

<!DOCTYPE html>
<html>
    <head>
      <title> Challenge Time! </title>
      <link type='text/css' rel='stylesheet' href='style.css'/>
    </head>
    <body>
      <p>
        <?php
          // Your code here
          class Cat {
             public $isAlive = true;
             public $numLegs = 4;
             public $name ;

              public function __construct() {
                  $cat->name = $name;;
                  }
              public function meow(){
                  return "Meow meow";
                  }
              }


              $cat = new Cat(true ,4 , CodeCat);
              echo $cat->meow();
        ?>
      </p>
    </body>
</html>

Upvotes: 0

Views: 163

Answers (2)

Daniel Dudas
Daniel Dudas

Reputation: 3002

In your code you have a constructor with no parameters, so $name will be undefined. And when you want to create a new object Cat you call it with 3 params, but you don't have a constructor like that.

What you want is to have a constructor with 1 param $name and call it with that param like this:

<?php
      // Your code here
      class Cat {
         public $isAlive = true;
         public $numLegs = 4;
         public $name ;

         public function __construct($name) {
              $this->name = $name;
         }
         public function meow(){
              return $this->name;
         }
      }


      $cat = new Cat('CodeCat');  //Like this you will set the name of the cat to CodeCat
      echo $cat->meow();  //This will echo CodeCat
?>

Upvotes: 0

Gvidas
Gvidas

Reputation: 1964

There's three mistakes:

  1. __constructor without parameters
  2. Using undefined variable $cat inside constructor instead of $this
  3. CodeCat should be string 'CodeCat'

Working code should look something like this:

<?php
          // Your code here
          class Cat {
             public $isAlive = true;
             public $numLegs = 4;
             public $name ;

              public function __construct($isAlive,$numLegs,$name) {
                  $this->name = $name;
                  $this->isAlive = $isAlive;
                  $this->numLegs = $numLegs;
                  }
              public function meow(){
                  return "Meow meow";
                  }
              }


              $cat = new Cat(true ,4 , 'CodeCat');
              echo $cat->meow();
        ?>

Upvotes: 2

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