Re: How can an elephant count for nothing?

> 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. Virgil http://www.jampmark.com