Faker
A PHP library that generates fake data for you
...These bundled formatters can be found in the default locale, and include person, address, phone number, company, date-time and more. Faker is also capable of localization, taking a locale as an argument and returning localized data. It can also populate entities using an ORM or an ODM, and features language-specific formatters as well.
If you need to bootstrap your database, fill-in your persistence for stress testing, or anonymize data taken from a production service, Faker is a great choice for you.