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PHP Object-Oriented PHP Basics (Retired) Properties and Methods Mid-Course Challenge

Why am I not able to assign parameters to variables in constructor?

<code> <?php

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

} } ?> </code>

I'm not sure but this seems like a bug. Task 2 requires you to submit the parameter as $name, but then Task 3 requires that you refer to it as common_name? If I use the code:

<code> $this->common_name = $common_name; </code>

It appears to work but then requires me to go back to Task 2. If anyone could provide some input it would be greatly appreciated!

1 Answer

Winnie E Tibingana
Winnie E Tibingana
21,066 Points

Hi Claudio,

the way you are defining the constructor is correct. the only problem is with the assignment of the constructor parameters the constructor will use.

function __construct($name, $flavor, $record) {
         $this->name = $common_name;  //this should be $this->common_name = $name;
         $this->flavor = $flavor; 
         $this->record_weight = $record_weight;  // this is not correct either. Please correct as explained above.


Constructors allow you to initialise your object's properties when you instantiate (create) an object. Please read more here: http://www.killerphp.com/tutorials/object-oriented-php/php-objects-page-3.php and here: http://php.net/manual/en/oop4.constructor.php

Your object is the Fish class.

We then provide each constructor parameter ($name, $flavor, $record) a value in relation to the class using $this which is a reference to the current object Fish and the arrow operator (->) as below:

$this->common_name = $name;

Hope this helps.