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Yongyu Zhang
Yongyu Zhang
1,892 Points

Help,I don't understand why it should be like that.

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;
  function getInfo() {
    return "A $this->common_name is an $this->flavor flavored fish. The world record weight is $this->record_weight";

↑It's the correct code.

My code :

function getInfo() {

return "A $common_name is an $flavor flavored fish.The world record weight is $record_weight. "  


What's my mistake?And why does it need to be" $this->common_name = $name" instead of "$common_name = $name"?I think I haven't understand all this stuff. :(

1 Answer

Hi Yongyu,

You code is missing the pseudo-variable $this-> before the variable. You use $this-> as this is telling the class that you wish to reference its own property of that name; otherwise it'll look for a variable you created separate from the class's property variables. When creating your own classes, you will be using $this-> a lot when referencing properties of that class. For more information pertaining to the use of $this->, click here. Hope this helps you with your issues.