PHP Compiler Testing
Clone a List

The Code tab has code which attempts to add a clone of a list to itself. There is no error message, but the results are not as intended. Can you fix the code?

Examples

clone([1, 1]) ➞ [1, 1, [1, 1]]

 

clone([1, 2, 3]) ➞ [1, 2, 3, [1, 2, 3]]

 

clone(["x", "y"]) ➞ ["x", "y", ["x", "y"]]