On 16/02/2011, at 1:21 PM, Mark Kelly wrote:

> In this way almost any value in $z will trigger the conditional code, 
> including 0 or an empty string. The exceptions are FALSE and NULL. If you 
> explicitly need to react to a NULL value, use is_null() to detect it. 


As $z is converted to a boolean and exists, that works just the same way as 
Simon Welsh
Admin of http://simon.geek.nz/

Who said Microsoft never created a bug-free program? The blue screen never, 
ever crashes!


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