You can retrieve the CuteEditor contents using the $_POST array. The name of the variable in the $_POST array will be CuteEditor ID. For example if your Cute Editor class ID is "Editor1", the variable would be $_POST["Editor1"].  

After you get this data, you can write it into any data source.

The following example show you how to store image to database, it is based on .NET,  you can take a look at it.