After reading this chapter, you should be able to provide an extension to the community that will be written using best practices. Our extension can be designed for speed and we have discovered that the best practices come, for the most part, from Magento and the intelligent use of its resources.
Security comes first; do not forget to check twice whether the code you are writing is secure, by using automatic tests and manual reviews. This aspect is the most important thing to consider today. Your clients and users will not forgive you for not thinking of it!
In the next chapter, we will write complete unit tests with PHPUnit.