encrypting is better on script or on DB?

[Sergio Juarez]

I have managed diferent ways to encrypt my important information that needs to be stored in my database and I have the following question. What would be more secure? to have the encryption and decryption made on directly on the mysql server with something like AES or maybe to do it in the php script before you send the data ,(send the encrypted result to store it on the DB). I am using the http webserver and mysql on the same machine.

Would it be safe enough if I do the encryption on the script? and have SSL so that no one can sniff the strings before they are encripted? Thank you.