We created a few blocks; you should have gotten a first impression about the way to build a block. Whether you build simple or more complicated blocks, the process we've looked at stays pretty much the same. Depending on your background, things might be a bit confusing at this point but take some time to go through these examples and you'll realize they all work more or less the same way. You can also go and download some add-ons from the marketplace or anywhere else on the Internet. There are always a few common elements in concrete5 blocks. Once you understand them, it shouldn't be too difficult to use your PHP and jQuery skills to come up with more advanced blocks.
Please note, we haven't looked at every method available, it's not a reference book. This chapter was merely a collection of explanations about building blocks. If you're eager to understand every detail of the concrete5 API, you have to dig a bit deeper. If you don't, just remember the basic elements of a block—db.xml...