yes, but the real question is: is it a smart thing to do?
And the answer to that is a hearty NO!
🙂
It is much better to store the array-data as seperate records in one of more tables. That way you can access the data through SQL commands. If you store the PHP array, you can only ever access the data if you firstread it into PHP.
This might seem ok if you are just using one array to hold user info, but you will get into serious problems later.