parse_ini_file可以使用多少级别的嵌套数组？
例如，可以创建以下数组吗？如果是这样，怎么样？
Array
(
[first_section] => Array
(
[one] => 1
[five] => 5
[animal] => Dodo bird
)
[second_section] => Array
(
[second_1] => Array
(
[second_1_1] => 1
[second_1_2] => 2
[second_1_3] => Array
(
[second_1_3_1] => one
[second_1_3_2] => two
)
)
[second_2] => two
)
)