Let’s start to play by trying and doing
Developers who depend heavily on unit tests use a technique known as “test-driven development,” or TDD.
TDD is a software development process whereby you write tests before you implement code. So, the tests guide the developer to write the code itself. TDD is a cyclical process, with 4+1 steps: write tests, write code, refactor, test again, and repeat the process again.
PHP TDD Tools
There are many tools that can be of great help in TDD with PHP.
PHPUnit
PHPUnit ( ...
