Level 104
No $ on description here; you are getting the description property on the Task object
<?= $task->description; ?>
1 like
Jan 11, 2022
5
Level 1
Cannot figure out Undefined Variable error while following PHP Practitioner 101
Hi, im new to PHP and Im going through the PHP Practitioner 101 class, Im up to lesson 12 - Classes. So far everything makes so much sense and Jeffrey explains things so easy, but Im stuck and I cannot figure out where Im going wrong. Im getting these errors:
Warning: Undefined variable $description in C:\xampp\htdocs\phptest\index.view.php on line 12
Warning: Undefined property: Task::$ in C:\xampp\htdocs\phptest\index.view.php on line 12
Warning: Undefined variable $description in C:\xampp\htdocs\phptest\index.view.php on line 12
Warning: Undefined property: Task::$ in C:\xampp\htdocs\phptest\index.view.php on line 12
Warning: Undefined variable $description in C:\xampp\htdocs\phptest\index.view.php on line 12
Warning: Undefined property: Task::$ in C:\xampp\htdocs\phptest\index.view.php on line 12
Here are my 2 pages of code:
index.php
<?php
class Task {
public $description;
public $completed = false;
public function __construct($description)
{
$this->description = $description;
}
public function complete()
{
$this->completed = true;
}
public function isComplete()
{
return $this->completed;
}
}
$tasks = [
new Task('Go to store'),
new Task('Pick up milk'),
new Task('Pay for milk')
];
require 'index.view.php';
index.view.php
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>PHP Test</title>
</head>
<body>
<div>
<ul>
<?php foreach ($tasks as $task) : ?>
<li><?= $task->$description; ?></li>
<?php endforeach; ?>
</ul>
</div>
</body>
</html>
Hope you can help, thanks.
Level 17
When accessing a class member, you don't need the $. Instead of $task->$description, use $task->description.
1 like
Level 1
OMG - thank you both so much, such a dip stick
Level 104
@deanclarke55 no worries, please mark the thread closed by marking a Best Reply above.
Aside, just to knock your socks off; $task->$description is actually valid PHP. Providing there is a $description variable in scope, and its value is a string that matches a property on the Task instance, it will work!
<?php $description = 'description';
<?php foreach ($tasks as $task) : ?>
<li><?= $task->$description; ?></li>
<?php endforeach; ?>
Level 1
@tykus Thank you, I think I understand that. Im looking forward to more problems like this - its all part of the fun and the frustrating problems are the ones that stick in my head more so I dont do it again...but I probably will. Thanks again and for being so quick.
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