Introducing Session Management Php, Mysql Part-l

A session manages the interaction between a web browser and a web server. For example, a session allows an application to track the items in a shopping cart, the status of a customer account application process, whether or not a user is logged in, or the finalizing of an order. Sessions are essential to most web database applications.

A session has two components: session variables and a session identifier (ID). The session variables are the state information that's related to a user's interaction with an application. For example, the session variables might store that the user's shopping cart contains five items, what those items are, their price, what items the user has viewed, and that the user is logged into the application. The session variables are stored at the web server or database server, and are located using the session ID.

When a session is started, the user's browser is given a session ID. This ID is then included with subsequent requests to the server. When a browser makes a request, the server uses the session ID to locate the corresponding session variables, and the variables are read or written as required. In practice, session variables are typically stored at the web server in a file (the PHP default) or at the database server in a table. 

Shows how the session variables for Beth's session are identified and stored in the web server environment; the session ID distinguishes between Beth's session and other users of the system.

Using sessions, all of the variables that represent the state of an application don't need to be transmitted over the Web. The session ID is transmitted between the browser and server with each HTTP request and response, but the session data itself is stored at the server. The session ID is therefore like the ticket given at a cloakroom. The ticket is much easier to carry around and ensures that you get back your own hat and coat. Storing variables at the server also helps prevent accidental or intentional tampering with state information.

The session ID is usually transmitted as a cookie . A cookie is a named piece of text that is stored in a web browser, and is sent with HTTP requests, like data sent with the GET or POST methods. You can find out more about cookies from the interesting Cookie Central web site at http://www.cookiecentral.com/faq/ or more formally in RFC 2109 at http://ietf.org/rfc/rfc2109.txt?number=2109.

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Why Web Design is Advantageous to Business and Profit

The way you have your website designed is going to influence your online business and how much of a profit you are able to generate from it. There is so much competition online these days that you have to offer a nice looking website or consumers are going to find another one that will. There are some common elements you want to have in place for your website so that it will be profitable for you.

Most consumers are very impatient and they won’t wait long for a web page to open up. If you are using animation or Flash to impress consumers you may find it isn’t working well because they aren’t waiting around long enough for it to open up. You generally have three seconds or less before they will go to another website that does open quickly. Since you will likely have links to various web pages, make sure that they can always access the homepage from any of these pages.

It doesn’t matter how good the information is on your website if consumers can’t read it. Take the time to choose a reasonable size of font and discover colors that work well together. I recently visited a website that had good information but I couldn’t concentrate on it because the background was green and the writing was in pink. While you want the website design to be attractive it also has to be easy on the eyes.

The navigation for your entire website should be very simple to follow. Consumers aren’t going to spend their time trying to figure out how to get where they want to be. Have a tool bar accessible on the top. You can also incorporate simple codes in areas that say CLICK HERE or other similar wording so they can get where they want to be.
It is vital that you make the checkout process as easy as possible for your consumers. It should be step by step to follow and move along quickly. Offer plenty of options for payment including e-check, Paypal, and credit cards. The more payment options you include the more sales you will generate.

It is a common courteousy to have your website set up to provide an immediate confirmation number for them once the purchase has been completed. This way they know their order was processed and they can contact you about it with that number should they need to.

Feel free to be creative with your website design as long as you are able to incorporate these various elements in it as well. You will definitely have the attention of the consumers in your target market if you offer them something refreshing that they haven’t seen before. At the same time though you have to make sure it is easy to ready and easy to navigate. Not everyone has the same level of expertise when it comes to using the internet so make your site accessible to that category as well.

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