What is Class in Programming ?
A class is a collection of variables and functions working with these variables. Variables are defined by var and functions are defined by function. It is an object oriented programming.
Define a class
Define a class using a keyword class
Syntax
class className
{
}
Example
class myfirstprogram
{
}
Note: Here myfirstprogram is a class name
Functions
Functions are defined inside the class, which is used to access the object data.
Define a function
Define a function using the keyword function
Syntax
function functionName()
{
}
Example
function factorial()
{
}
Note: factorial is a function name
Sample code to find factorial of the given number
//fact.php
<?php
class fact
{
public $num=null;
public $fact1=null;
public $objRes=null;
function getValue()
{
$this->num=$_REQUEST[‘num’];
}
function factorial()
{
if(isset($_REQUEST[‘submit’]))
{
$this->getValue();
$fact1=1;
for ($i=$this->num; $i>=1; $i–) {
$fact1 = $fact1 * $i;
$this->objRes=$fact1;
}
}
}
}
$objFact=new fact();
$objFact->factorial();
?>
<html>
<body>
<form action=”fact.php” method=”post”>
Enter the number<input type=”text” name=”num”/>
<input type=”submit” name=”submit”/>
</form>
<?php
echo “Factorial of $objFact->num is $objFact->objRes”;
?>
</body>
</html>
output
