Fibonacci sequence

core/function/fibonacci-sequence/code/src/fibonacci-sequence.php:

<?php

function fibonacci($number)
{
  // TODO
}

core/function/fibonacci-sequence/code/print/fibonacci-sequence.print.php:

<?php

require __DIR__ . '/../src/fibonacci-sequence.php';

// Fibonacci series

// making the first 0 numbers
var_dump(fibonacci(0));
var_dump('');

// making the first 1 numbers
var_dump(fibonacci(1));
var_dump('0');

// making the first 2 numbers
var_dump(fibonacci(2));
var_dump('0, 1');

// making the first 4 numbers
var_dump(fibonacci(4));
var_dump('0, 1, 1, 2');

// making the first 6 numbers
var_dump(fibonacci(6));
var_dump('0, 1, 1, 2, 3, 5');

Response