how can i know the number of people who have visited my website. plz guys help me out on it.

You coud count the no of unique sessions.

Professionally it would make sense for you to get an analytics account.

Web analytics is the measurement, collection, analysis and reporting of internet data for purposes of understanding and optimizing web usage. Web analytics is not just a tool for measuring website traffic but can be used as a tool for business research and market research. Web analytics applications can also help companies measure the results of traditional print advertising campaigns. It helps one to estimate how the traffic to the website changed after the launch of a new advertising campaign. Web analytics provides data on the number of visitors, page views, etc to gauge the traffic and popularity trends which helps doing the market research.

try
http://www.google.com/analytics/ or  http://web.analytics.yahoo.com/

hope this helps

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@Code128 thx but can yu please provide me with the code cos i am just a beginner

This is how we do it in web development. B4 u re-invent the wheel, make sure its worth ur time.
Click the link below to get tons of visitor counter scripts

http://www.google.com.ng/search?q=free+php+visitors+counter+script

Exacta lojik, it is not everything that needs wasting time on

A couple of years ago it was very fashionable to have a 'Hit Counter' on your website. Today you run the risk of being labelled a newbie, or a hobby website owner if you have a hit counter on your website. The problem with hit counters are that

[list]
[li]Nobody is quite sure what these 'hits' are counting. As you will see, collecting detail about website statistics is not as straightforward as it sounds. A hit could be anything from a unique visitor to the fact that you've displayed 5 graphical elements on your site (in which case, 5 hits will be recorded!)[/li]

[li]Hit counters are very easy to manipulate. It is not unknown for a desperate webmaster or website owner to set the hit counter to start at a vastly inflated number. Hit counters can also easily be reset - again to any number that you feel like.[/li]

[li]If you have a website with very low traffic, do you really want to proclaim that to the world? Especially if you are trying to promote your website for advertising purposes (let this be a warning to anyone wanting to advertise on a website - first do some investigation into how much traffic the website gets before laying out big money)[/li]
[/list]

You can do it right way and get an a free Analytics account from yahoo or google go the easy way use a hit counter

Thank you very much lojik. it takes me less than 5min to get the code. you are too much bro

A couple of years ago it was very fashionable to have a 'Hit Counter' on your website. It supposedly showed the whole world how many 'hits' you've received to date. Today you run the risk of being labeled a newbie, or a hobby website owner if you have a hit counter on your website. The problem with hit counters is that
1. Nobody is quite sure what these 'hits' are counting. As you will see, collecting detail about website statistics is not as straightforward as it sounds. A hit could be anything from a unique visitor to the fact that you've displayed 5 graphical elements on your site (in which case, 5 hits will be recorded!)

2. Hit counters, unlike odometers, are very easy to manipulate. It is not unknown for a desperate webmaster or website owner to set the hit counter to start at a vastly inflated number. Hit counters can also easily be reset - again to any number that you feel like.

3. If you have a website with very low traffic, do you really want to proclaim that to the world? Especially if you are trying to promote your website for advertising purposes (let this be a warning to anyone wanting to advertise on a website - first do some investigation into how much traffic the website gets before laying out big money).
As I mentioned, collecting accurate traffic statistics is not straight forward. Different website statistics tools also have different ways of referring to the traffic.

If you want accurate and measurable result I would advise you get a free web analytics account, this is the professional way of monitoring web traffic