**`gmp_binomial`** is a function in PHP that calculates the **binomial coefficient**.

# 
#  Syntax

---
```
gmp_binomial(GMP|int|string $n, int $k): GMP
```
---

# 
#  Parameters

* **`n`**: can be a numeric string, GMP object, or type int.

* **`k`**: number of combinations.

##
## Return value

The function returns the binomial coefficient $C(n,k)$.

##
## Code

<?php
   $result = gmp_binomial('4',2);
   echo "The binomial coefficient of the result is ".$result;
?>

# 
## Output

---
```c
The binomial coefficient of the result is 6
```

What is gmp_binomial in PHP?

PHP's gmp_binomial function calculates binomial coefficients from integers or GMP objects.