In PHP, how do I deep copy arrays in a memory-efficient way?

In PHP, creating a deep copy of arrays can be achieved using various methods. A deep copy ensures that all nested arrays and objects are cloned, rather than just their references. One of the efficient ways to perform a deep copy is to utilize `json_encode` and `json_decode`. However, this method comes with some caveats regarding data types. For a more versatile approach, consider using serialization or recursion.