(1) Creating Array.
(2) Imploding Array into a string.
(3) Exploding a string back to an array.

This function should be useful creating a CSV file or reading CSV file in an array.

Note: So far the most difficult thing about learning PHP is to create an environment where you can test your source code. Lucky for me, I have my domain and web environment that supports PHP.

If you want t learn PHP, I suggest you get your own learning environment in the cloud.