fibbonaci

this method for print deret fibbonaci

use Nagara\Src\Str\StringMagic;

$str = new StringMagic;
$str->fibbonaci(6);
// return 0 1 1 2 3 5
echo "<br>";
$str->fibbonaci(10);
// return 0 1 1 2 3 5 8 13 21 34