Functions are used to perform a well defined task that is normally repeated at various places within a web site, web application, or other software application. The function sometimes needs certain information before performing its task, and sometimes returns a value to the calling page or program.

An example of how to use a simple function in PHP:

 function showMessage() {
echo "{$_SESSION["message"]}"; }

The above example shows a very simple function that displays the contents of a session variable called 'message'. The idea being that while a user is using a web site, etc, various messages are generated and stored in the 'message' session variable. Whenever the showMessage function is called, the contents of the session variable are displayed. So, for example, when the user logs on, you could display a message saying that they have done so. Likewise, when they log off, a different message could be displayed.

Calling a function

To call the showMessage function, you would just need to include the line:

showMessage()

in the web page (wrapped in php tags to distinguish it from normall HTML).

Passing values to a function

Often, a function requires one or more input values in order to perform its task. For example, take the following example that takes two numbers as input, and adds them together. The result is then returned to the calling web page or program.

function addNumbers($number1,$number2) {
$answer = $number1 + $number2;
return $answer; }

In the calling program we would have something similar to the following:

$number1 = "5";
$number2 = "6";
$sumOfNumbers = addNumbers($number1,$number2);
echo "$sumOfNumbers";

Obviously, in a real program you would not have the numbers hardcoded like this, but they would be obtained from user input or by some other means. Notice also that although the name of the returned variable is $answer, the calling program makes no reference to that. We could, if we wanted to, change the calling program to:

$answer = addNumbers($number1,$number2);
echo "$answer";

which might make things slightly easier to understand.

You know when it comes to doing anything in life its all about implementation. Sure at this juncture you may be overwhelmed and a little confused about what to do. You may have lots of ideas but you just do not know where to start.

As a result you do not implement anything you just get confused and overwhelmed and then nothing happens. The first thing you need to do is identify your strengths. This is where you are going to begin.

When it comes to building a website you know that its core value is based upon the information it provides. Secondly that information needs to be organized logically. Then that information needs to make sense to your readers and also needs to be understood by the search engines.

So having good site structure will benefit all parties concerned. At this point you probably have something in mind about what you want to do online - in other words a subject that you want to build your site around.

If not you have some reason for wanting to build a site in the first place and that may be just to share it with friends and family or to make money.

Identify your ideas and write them down. Once you have cleared your mind then you will be in a far better position to move onto the next task.

The main thing is to understand the main structure of the internet and that is to provide information which can be delivered through multiple mediums such as video, audio, or straight content.

Then just make sure that you can deliver this effectively and you will have a solid foundation to build on.

Before you actually begin your website you have to put a lot of consideration into things such as the domain name itself and the hosting company you sign up with. These decisions can have a major affect on the end result so ensure you do your research to get the best outcome.

Once you have found the desired domain name you have to get it registered, there are a number of companies that offer the registration of domains so how do you decide which to use? The first thing you should look for is their reputation, you would hate to deal with a dishonest company that doesn't offer the customer service you deserve. In order to find a reliable company you can ask for recommendations from friends and family or other webmasters to see who they use. The next factor you should look at is the price, don't be fooled for the cheapest companies out there. Just because they can offer a cheap service doesn't mean that it's the best choice, check for renewal prices and any other disadvantages you may be faced with so that you can be confident you are receiving the best deal.

When you have your domain name the next step is to choose hosting, you cannot afford to rush this decision as it will determine the results of your website. Put the time and effort in to check which hosts are reliable and offer great customer service. Never accept anything below 99.99% up time as you will be loosing money every time your website goes down. You then have to spend the time in order to get it back up and running as intended, loosing even more money. Browse through each of the different hosting companies, checking the additional features, benefits and mainly the price in order to get the best deal based on your requirements.

You can find various companies such as name cheap, triple and go daddy who can be the solution to all your problems. You can register your domains with them and buy hosting at the same time, this takes a lot of the hassle out of the equation as everything is in the one place. There are some advantages to doing this, you can often get a reduced price if you buy them both together. It will give you more time to focusing on your website and if you ever have a problem you only have to contact the one company. Ensure that you check out the hosting package before you buy it to make sure that it has the features you require.

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