A common use case for Regular Expressions in PHP is to ______.

A common use case for Regular Expressions in PHP is to validate user input, such as email addresses or phone numbers. Regular Expressions provide a flexible and efficient way to define patterns for validating user-provided data. For example, you can use Regular Expressions to check if an email address follows the correct format or if a phone number has the expected structure. This helps ensure data integrity and improve the accuracy of user inputs. Regular Expressions can also be used for various other tasks like data extraction, text parsing, and pattern matching. Learn more: https://www.php.net/manual/en/book.regex.php