<select name="username" size="12" multiple="multiple">
using the implode function on an array will not create a separate record for each selection, it will convert the array to a comma separated list.
If you wish to save a unique record for each selection, you will need to hand code the insert, there is not a tool that will do this for you. You will need to code a loop through each index in the array, and execaute an SQL insert statement for each selected user name.
It will be easier to store the comma separated list in a single record.
ok thank you but i think it's ver difficult for me create a loop with the array and so on....how could be the php code?