Yes, but…what is CodeIgniter? What are frameworks?
Shortly after programming was invented, it was noticed that it involved many repetitive operations. And maybe shortly after that, Ada Lovelace—spanner in hand adjusting Babbage's differential engine—or Alan Turing at Bletchley Park decided to modularize code. So, you only had to write certain chunks once, and could then reuse them. PHP programmers are used to writing separate chunks of code in functions, and then storing those functions in include files.
At one level, a framework is just that—lot of chunks of code stored in separate files, which simplify the coding of repetitive operations. In the previous examples, connecting to the database or building HTML form elements are abstracted and simplified ...
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