Question

I’d like to save an array to disk so that I can easily read it back into an array. What would be an easy way to do this?

Answer 1

file_put_contents($file, serialize($array));

And read it back by

$array = unserialize(file_get_contents($file));

Edit:
You can also use json_encode/json_decode instead. Check this question Preferred method to store PHP arrays (json_encode vs serialize) to get more information.