Why numbering should start at one - representation class PHP

README.md

####Why numbering should start at one

####Example

$arr = new SenseArr();
$arr[] = 'foo';
print_r($arr);

Result

SenseArr Object
(
    [arr] => Array
        (
            [1] => foo
        )
)

SenseArr.php

class SenseArr implements ArrayAccess
{
	public function offsetSet($key, $value)
	{
		if (count($this->arr) == 0 && $key == null) {
			$this->arr[1] = $value;
			return;
		}
		
		$this->arr[$key] = $value;
	}
	
	public function offsetGet($key)
	{
		return $this->offsetExists($key) ? $this->arr[$key] : null;
	}
	
	public function offsetExists($key)
	{
		return isset($this->arr[$key]);
	}
	
	public function offsetUnset($key)
	{
		unset($this->arr[$key]);
	}
}