PHP - Get rid of Warning: division by zero on line

<body> <h1><a rel="nofollow" href="http://www.cagedflame.com/index.php?name=getridofdivisionbyzero.php" >Get rid of Warning: division by zero on line</a></h1> <p>Php is a great language because it allows you to create great web application but it may be useful even for calculations. Php is often used creating graphics on the fly starting from simple data. If you're projecting a script tide up with math you may encounter a typical error that come out when you try to divide a number by zero.</p> <p><a href="http://www.tutcity.com/">More Tutorials</a></p> </body>