Program for Factorial in PHP with PHP "for loop"

In this post, we are going to see how to write a PHP function to calculate the factorial of a given number in PHP using for loop. The factorial of a number is the product of all integers between 1 and itself.
Code
<?php
  
function fact($n){ 
    
$f = 1; 
    
for ($i = 1; $i <= $n; $i++){ 
      
$f = $f * $i; 
    
} 
    
return $f; 
  
} 
    
  
$n = 4; 
  
$f = fact($n); 
  
echo "Factorial of $n is $f"; 

?>
Output of this program will be 
Factorial of 4 is 24