To connect to a database with the DBI, we need to first construct a string that identifies the database we want to connect to; this is called a data source name, or DSN. Let's assume we're going to be working with a MySQL database called "phonebill." (Simply because that's what I was working with yesterday.) The DSN for this is made up of three parts... more...
Traditionally, Unix/Linux/POSIX filenames can be almost any sequence of bytes, and their meaning is unassigned. The only real rules are that "/" is always the directory separator, and that filenames can't contain byte 0 (because this is the terminator). Although this is flexible, this creates many unnecessary problems. In particular, this lack of limitations makes it unnecessarily difficult to write correct programs (enabling many security flaws), makes it impossible to consistently and accurately display filenames, causes portability problems, and confuses users. more ....
Comments