What steps can be taken to identify and remove extra line breaks in text emails generated by PHP scripts?

Extra line breaks in text emails generated by PHP scripts can be identified and removed by using the `trim()` function to remove any leading or trailing white spaces, including line breaks. Additionally, the `preg_replace()` function can be used with a regular expression to remove any consecutive line breaks within the text.

```php
// Remove extra line breaks from the email body
$email_body = "Hello,\n\nThis is a test email.\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n