[development] node object in hook_block?

[Augustin (a.k.a. Beginner)]

Hello,

I see many implementations of hook_block who declare
   global $user 
but none with
   global $node

I tried it but $node is still not set, so I cannot access the node object 
directly.
the solution would be to do like in book_hook() and check on arg():
    if (arg(0) == 'node' && is_numeric(arg(1)))
but it looks like a hack and for what I have in mind, it makes things more 
complicated.

Isn't there a possibility to have directly access to the $node object?
How?

thanks,

Augustin.


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