In this chapter, we have focused our discussion on basic data structures and their names. We have also learned about solving problems with defined steps, known as algorithms. We have also learned about analyzing the algorithms and the big O notation along with how to calculate the complexity. We had a simple brief about the built-in data structures in PHP in the form of SPL.
In the next chapter, we are going to focus on the PHP array, one of the most powerful, flexible data types in PHP. We are going to explore different uses of the PHP array to implement different data structures such as hash table, map, structs, and so on.