PHP Class Exercises : Calculate the factorial of an integer
PHP class: Exercise-3 with Solution
Write a PHP class that calculates the factorial of an integer.
Sample Solution:
PHP Code:
<?php
class factorial_of_a_number
{
protected $_n;
public function __construct($n)
{
if (!is_int($n))
{
throw new InvalidArgumentException('Not a number or missing argument');
}
$this->_n = $n;
}
public function result()
{
$factorial = 1;
for ($i = 1; $i <= $this->_n; $i++)
{
$factorial *= $i;
}
return $factorial;
}
}
$newfactorial = New factorial_of_a_number(5);
echo $newfactorial->result();
?>
Sample Output:
120
Flowchart :

PHP Code Editor:
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Previous: Write a simple PHP class which displays an introductory message like "Hello All, I am Scott", where "Scott" is an argument value of the method within the class.
Next: Write a PHP class that sorts an ordered integer array with the help of sort() function.
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