What are the best practices for presenting testable examples with demo input data and a clear explanation of expected results when seeking help with PHP coding issues on forums?

Below is an example of how to present testable examples with demo input data and a clear explanation of expected results when seeking help with PHP coding issues on forums: Issue: I am trying to sort an array of numbers in descending order using PHP. Code snippet:

```php
// Input data
$numbers = [5, 2, 8, 3, 1];

// Sorting array in descending order
rsort($numbers);

// Expected result: [8, 5, 3, 2, 1]
print_r($numbers);
```

In this example, the issue is clearly stated, and a code snippet is provided that demonstrates how to sort an array of numbers in descending order using the `rsort` function in PHP. The expected result is also explained, making it easier for others to understand the problem and provide assistance.