This article is primarily for PHP programmers. Nevertheless, the basic idea is not unique to PHP and guided by basic understanding of OO ideas and SQL, anybody should be able to grab it.
Most interactive websites nowadays require data to be presented dynamically and interactively based on input from the user. For example, a customer may need to log into a retail website to check his purchasing history. In this instance, the website would have stored two types of data in order for the customer to perform the check ? the customer?s personal login details; and the customer?s purchased items. This data can be stored in two types of storage ? flat files or databases.
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