Hi Gustav!
Gustav Wiberg wrote:
My oponion is that is insane to use global variables. The main drawback
with global variables is that is very easy to mix up variables, and keep
track of what variable belongs to what. So an advice: Don't use it!
Ok, so what's your recommendation to solve the problem with using a DB
class in many other objects/methodes? Think of a DB class:
class DB {...}
And a lot of classes which want to use the DB class:
class Foo {
function saveChangesInDb() {...}
}
class Bar {
function saveChangesInDb() {...}
}
- You can use a global "$db = new DB..." and pass it to every class/methode,
- you can make $db "global" in each methode,
- you can create a new instance ("new DB") in every methode (but you
usually only want a single DB-connection per script, and where do you
pass config-data to access the DB?) or
- use a factory/singleton, which is not so much better than a global
variable (and again, what about config-data?).
So what's the way you'd recommend and why?
best regards
Andreas
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