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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Installment 1

Developing State-enabled Applications With PHP

When a user is browsing through a website and is surfing from one web page to another, sometimes the website needs to remember the actions (e.g. choices) performed by the user. For example, in a website that sells DVDs, the user typically browses through a list of DVDs and selects individual DVDs for check out at the end of the shopping session. The website needs to remember which DVDs the user has selected because the selected items needs to be presented again to the user when the user checks out. In other words, the website needs to remember the State – i.e. the selected items – of the user’s browsing activities.

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