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PHP Object-Oriented PHP Basics (Retired) Properties and Methods Constructor Method

Posted by William J. Terrell
William J. Terrell
17,403 Points

Encountering several errors...

So, my code is as follows:

<?php 

    class Product
    {

        public $name = 'default name';
        public $price = 0;
        public $desc = 'default description';

        function __construct($name, $price, $desc) {

            $this->name = $name;
            $this->price = $price;
            $this->desc = $desc;

        }

        public function getInfo() {

            return "Product name: " . $this->name;

        }


    }   

    $p = new Product();
    $shirt = new Product("Space Juice T-Shirt", 20, "Awesome Grey T-Shirt");
    $soda = new Product("Space Juice Soda", 2, "Grape Flavor Soda");
    echo $soda->getInfo();

?>

and it seems to print out the correct information to the browser, but I get all these Warnings and Notices too:

Warning: Missing argument 1 for Product::__construct(), called in C:\xampp\htdocs\treehouse\Object Oriented PHP\index.php on line 27 and defined in C:\xampp\htdocs\treehouse\Object Oriented PHP\index.php on line 10

Warning: Missing argument 2 for Product::__construct(), called in C:\xampp\htdocs\treehouse\Object Oriented PHP\index.php on line 27 and defined in C:\xampp\htdocs\treehouse\Object Oriented PHP\index.php on line 10

Warning: Missing argument 3 for Product::__construct(), called in C:\xampp\htdocs\treehouse\Object Oriented PHP\index.php on line 27 and defined in C:\xampp\htdocs\treehouse\Object Oriented PHP\index.php on line 10

Notice: Undefined variable: name in C:\xampp\htdocs\treehouse\Object Oriented PHP\index.php on line 12

Notice: Undefined variable: price in C:\xampp\htdocs\treehouse\Object Oriented PHP\index.php on line 13

Notice: Undefined variable: desc in C:\xampp\htdocs\treehouse\Object Oriented PHP\index.php on line 14
Product name: Space Juice Soda

Any idea what is going on?

Thanks!

3 Answers

Ted Sumner
Ted Sumner
Courses Plus Student 17,967 Points

Your issue is that you have $p = new Product(); with no arguments. If you comment out that line your errors go away.

William J. Terrell
William J. Terrell
17,403 Points

Always just a tiny little something, isn't it? :)

Thanks!

Ted Sumner
Ted Sumner
Courses Plus Student 17,967 Points

They did a poor job with this in the video. If you watch carefully, after he previews the code without errors the offending line is gone from his workspace but he never says to delete it.

Ted Sumner
PLUS
Ted Sumner
Courses Plus Student 17,967 Points
Ted Sumner
Ted Sumner
Courses Plus Student 17,967 Points

As another note, you can change your getInfo() function to this:

<?php

return "Product name: $this->name";

Variables inside double quotes are resolved prior to the echo. Variables inside single quotes are not resolved, so the variable name would display.

William J. Terrell
William J. Terrell
17,403 Points

Thanks!