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Hello!

PHP allows to work with uninitialized variables. E_NOTICE error level
can be used to warn before it but this is not perfect for two reasons:

1. E_NOTICE doesn't warn before adding elements to uninitialized
   arrays. It is further explained by Etienne Kneuss:
   http://www.colder.ch/news/09-09-2005/4/another-example-showing-t.html

2. E_NOTICE is emitted in a run-time and not in a compile-time which
   can be late (the error is spotted in the same time as abused).

To solve both problems, I've developed a program checking the usage of
uninitialized variables from outside the script without running it:
http://code.google.com/p/php-initialized/

Maybe the same concept can be used in the PHP compile-time.

Jakub Vrana

Looks great! Have been wanting similar behaviour in the lint
function for a while. Just the question is how exhaustive is its
checking. ( Any checking beyond current is pretty good, no
complaints there, but just trying to see how useful it is ).

Brief summary of the sort of situations we can expect to see
handled and the situations that are currently out-of-scope would be nice.

You are right. I've put it on
http://code.google.com/p/php-initialized/wiki/Features

Jakub Vrána