Introduction

PHP is a server scripting language, and It is a powerful tool for making interactive and dynamic Web-pages. I have used WampServer 2.2 for following example.

<?php
$num = 5;
$x = 1;
for($i=1;$i<=$num-1;$i++)
{
 $x*=($i+1); 
}
echo "The Factorial of  $num is: $x"."\n";
?>

Result