add two numbers en return them

**Adding Two Numbers in PHP**

Here's a simple PHP function that takes two numbers as input and returns their sum:

```php
/**
 * Adds two numbers together.
 *
 * @param float $num1 The first number.
 * @param float $num2 The second number.
 *
 * @return float The sum of num1 and num2.
 */
function addNumbers(float $num1, float $num2): float
{
    return $num1 + $num2;
}

// Example usage:
$num1 = 5.5;
$num2 = 3.7;

$result = addNumbers($num1, $num2);

echo "The sum of $num1 and $num2 is: $result";
```

In this example, the `addNumbers` function takes two parameters, `$num1` and `$num2`, which are both expected to be floating-point numbers. The function returns their sum, which is also a floating-point number.

Note that in PHP, you can use the `+` operator to add two numbers together, which is what the `addNumbers` function does. This is a simple and straightforward way to add two numbers in PHP.