Skip to main content

Creating a Simple Visitor Counter in PHP

Creating a Simple Visitor Counter in PHP

Visitor counter is an easy way to track number of visitors coming to a web site, while sophisticated trackers can give detailed statistics of visitors, a simple visitor counter like the one we’re going tot create, would only track the number of times a web page (or site) has been requested.

A simple visitor counter which only tracks number of pageloads is very easy to create. It is obvious that the number of pageloads has to be preserved across different runs so we need to store that data in a Database or file. To ease things we’ll use a file.

Every time the page (with the script) is requested the value (number of pageloads) will be read from and incremented in the file. The initial value in the file should be 0.

Here is the code:

function showCounter()
//open the file in read & write mode
//fetch pageload data
//increment it
//seek to the start of file
//write the new value

//printf function is used to pad the 
    //pageload value, to make it look
return (printf("<h1><span style=\"color: #fff; 
                background: #000;\">%010d

Save this file with the name ‘counter.php’.

For this script to run you first need to create a file named ‘counter.txt’ with the value ‘0’ in the same directory the script is in.

Everything in the code above looks familiar except these lines:

function showCounter()

Well, this is how we create functions in PHP. Unlike C/C++ we don’t need to mention the return type of the function but the function-name should be preceded with the keyword ‘function’. You may return value of any data type from the function.

We have employed this method as to make it easier to integrate the visitor counting script to existing web pages. If suppose we have an existing web page named index.php, we can easily integrate this script as follows:

<?php include 'counter.php'?>
<head><title>Counter Example</head>
<h1>My Web Site</h1>
<?php showCounter(); ?>

Simple! We’re just including the script at the top to make the function available and at the bottom we’re calling the showCounter() functions to show visitor counter.

Previous Articles:

Popular posts from this blog

Fix For Toshiba Satellite "RTC Battery is Low" Error (with Pictures)

RTC Battery is Low Error on a Toshiba Satellite laptop "RTC Battery is Low..." An error message flashing while you try to boot your laptop is enough to panic many people. But worry not! "RTC Battery" stands for Real-Time Clock battery which almost all laptops and PCs have on their motherboard to power the clock and sometimes to also keep the CMOS settings from getting erased while the system is switched off.  It is not uncommon for these batteries to last for years before requiring a replacement as the clock consumes very less power. And contrary to what some people tell you - they are not rechargeable or getting charged while your computer or laptop is running. In this article, we'll learn everything about RTC batteries and how to fix the error on your Toshiba Satellite laptop. What is an RTC Battery? RTC or CMOS batteries are small coin-shaped lithium batteries with a 3-volts output. Most laptops use

The Best Way(s) to Comment out PHP/HTML Code

PHP supports various styles of comments. Please check the following example: <?php // Single line comment code (); # Single line Comment code2 (); /* Multi Line comment code(); The code inside doesn't run */ // /* This doesn NOT start a multi-line comment block /* Multi line comment block The following line still ends the multi-line comment block //*/ The " # " comment style, though, is rarely used. Do note, in the example, that anything (even a multi-block comment /* ) after a " // " or " # " is a comment, and /* */ around any single-line comment overrides it. This information will come in handy when we learn about some neat tricks next. Comment out PHP Code Blocks Check the following code <?php //* Toggle line if ( 1 ) {      // } else {      // } //*/ //* Toggle line if ( 2 ) {      // } else {      // } //*/ Now see how easy it is to toggle a part of PHP code by just removing or adding a single " / " from th

Introduction to Operator Overloading in C++

a1 = a2 + a3; The above operation is valid, as you know if a1, a2 and a3 are instances of in-built Data Types . But what if those are, say objects of a Class ; is the operation valid? Yes, it is, if you overload the ‘+’ Operator in the class, to which a1, a2 and a3 belong. Operator overloading is used to give special meaning to the commonly used operators (such as +, -, * etc.) with respect to a class. By overloading operators, we can control or define how an operator should operate on data with respect to a class. Operators are overloaded in C++ by creating operator functions either as a member or a s a Friend Function of a class. Since creating member operator functions are easier, we’ll be using that method in this article. As I said operator functions are declared using the following general form: ret-type operator#(arg-list); and then defining it as a normal member function. Here, ret-type is commonly the name of the class itself as the ope