将多个数组对象随机插入另一个数组，而不是混合任何单个数组对象元素的元素

Assume that having 3 array object: $main, $one, $two

How to Insert multiple array object into another array randomly not mixing elements of any single array object elements

$main = (1,2,3,4,5);

$one = ("orange", "apple");

$two = ("car", "bus", "train");

I need to insert array object elements '$one' and '$two' in random position of array '$main' with whole set of both array object elements without mixing.

Resulting array:

 $result = (1, 2, "orange", "apple", 3, 4, "car", "bus", "train", 5); 

Please comments if you are not getting my question. This would be a great help if answered.

Thanks a lot in advance.