What steps can be taken to ensure that error messages are displayed when working with PHP scripts?

To ensure that error messages are displayed when working with PHP scripts, you can set the error reporting level in your PHP script to display all errors, warnings, and notices. This can be done by adding the following line of code at the beginning of your PHP script:

```php
error_reporting(E_ALL);
ini_set('display_errors', 1);
```

This will ensure that all errors are displayed on the screen, making it easier to identify and debug any issues in your PHP script.