How does the case sensitivity of Linux affect PHP development compared to Windows systems?

In Linux, file systems are case-sensitive, meaning that file names are treated as distinct based on their case. This can cause issues in PHP development if file names are not consistently referenced with the correct case. To solve this issue, developers should ensure that file names are referenced consistently with the correct case throughout their code.

```php
// Example of consistent file name referencing in PHP code
require_once('MyClass.php');
```

In the above code snippet, the file `MyClass.php` is consistently referenced with the correct case to avoid any issues related to case sensitivity in Linux systems.