ci-bonfire / Sprint

		{

			$value = $array[$index];

		}

		elseif (($count = preg_match_all('/(?:^[^\[]+)|\[[^]]*\]/', $index, $matches)) > 1) // Does the index contain array notation

		{

			$value = $array;

			for ($i = 0; $i < $count; $i++)

			{

				$key = trim($matches[0][$i], '[]');

				if ($key === '') // Empty notation will return the value as array

				{

					break;

				}

				if (isset($value[$key]))

				{

					$value = $value[$key];

				}

				else

				{

					return NULL;

				}

			}

		}

		else

		{

			return NULL;

			$_file = $_FILES[$field];

		}

		// Does the field name contain array notation?

		elseif (($c = preg_match_all('/(?:^[^\[]+)|\[[^]]*\]/', $field, $matches)) > 1)

		{

			$_file = $_FILES;

			for ($i = 0; $i < $c; $i++)

			{

				// We can't track numeric iterations, only full field names are accepted

				if (($field = trim($matches[0][$i], '[]')) === '' OR ! isset($_file[$field]))

				{

					$_file = NULL;

					break;

				}

				$_file = $_file[$field];

			}

		}

		if ( ! isset($_file))

		{