Right now, will figure out how to discover factorial of a given number utilizing PHP program?

Given a number and we need to locate its factorial.

**Equation to discover factorial: 5! (Factorial of 5) = 5x4x3x2x1 = 120 **

**Example: **

```
Input: 5
Output: 120
```

**Program to discover factorial of a number in PHP**:

```
<?php
//program to find factorial of a number
//here, we are designing a function that
//will take number as argument and return
//factorial of that number
//function: getFactorial
function getFactorial($num){
//declare a variable and assign with 1
$factorial = 1;
for($loop = 1; $loop <= $num; $loop++)
$factorial = $factorial * $loop;
return $factorial;
}
//Main code to test above function
$number = 1;
print_r("Factorial of ".$number. " is = ".getFactorial($number). "\n");
$number = 2;
print_r("Factorial of ".$number. " is = ".getFactorial($number). "\n");
$number = 3;
print_r("Factorial of ".$number. " is = ".getFactorial($number). "\n");
$number = 4;
print_r("Factorial of ".$number. " is = ".getFactorial($number). "\n");
$number = 5;
print_r("Factorial of ".$number. " is = ".getFactorial($number). "\n");
?>
```

**Output:**

```
Factorial of 1 is = 1
Factorial of 2 is = 2
Factorial of 3 is = 6
Factorial of 4 is = 24
Factorial of 5 is = 120
```