Declare Members at top of Class or Just Before Use?

[eluser]n0xie[/eluser]
[quote author="OliverHR" date="1286828043"][quote author="n0xie" date="1286696727"]One usually doesn't 'declare' variables.[/quote]
I mean declaring in general programming terms. Declaring Variables
What use would declaring a variable have in a dynamic weak typed language?

[quote author="n0xie" date="1286696727"]The right way to do it, is to declare them at the top of your class so that whenever another developer looks at your class.[/quote]

I think is better to use comments for this.
[/quote]
You use comments to declare class properties?