> While PHP has a lot of nice features, it also has some traps which I am 
> forever falling
> into. One which I find particularly hard to understand is how mixed mode 
> comparisons work.
> For instance
> $string =  'elephant';
> If($string == 0) returns true;
> If($string != 0) returns false;
> If($string === 0) returns false;
> I know that in this case I should use 'If($string == '')', but I still manage 
> to forget.
> Can anyone explain clearly why comparing a string with zero gives this 
> apparently
> anomalous result?

when comparing string with integer, the interpreter first converts
string into an integer before comparison takes place.


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