Are there any specific PHP libraries or functions that can simplify the implementation of this algorithm?

To simplify the implementation of the algorithm, we can use the built-in PHP function `array_sum()` to calculate the sum of elements in an array. This function eliminates the need for manually iterating over the array and summing up the elements.

// Sample array of numbers
$numbers = [1, 2, 3, 4, 5];

// Calculate the sum of elements using array_sum()
$sum = array_sum($numbers);

// Output the result
echo "The sum of the numbers is: $sum";