Array from comma seperation

[snday]

[code=php:0]$foo = 0,1,2,3,4,5[/code]

I am wondering the best way to turn $foo into an array
with each array value being seperated from each comma.

Also, what is the preferred/best way to handle a permissions sql table/row
if each row is set up like(note, below is just an example illustration):
Name | Permission
guest - post=0, comment=0, etc....
I've seen many scripts use Constants and others using Serialize

[hitman6003]

use the explode function.

http://www.php.net/explode

[code]$foo = "1,2,3,4,5";

$foo = explode(",", $foo);[/code]

[snday]

Thanks