a simple if-login question

"Maxim Vexler" wrote:
> if ((($value1 != null) || ($value1 != "")) && $value2 != "" &&
$value1
>
> != $value2) { ret false }
>
> if i omit the [value2 != ""] i would still get the same result,
right?
>
> because I check if value1 != "" and then I check if
value1!=value2
> i.e. :
>
> if ((($value1 != null) || ($value1 != "")) && $value1 != value2)
{ ret
>
> false }
>
> regards, maxim.

I believe you are right. And you can simplify as well:
($value1 != null) || ($value1 != ""))
is equal to:
($value1 != ’’) [[don’t need the two statements]]
or if you have doubts, use:
(strlen($value1) > 0)

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if ((($value1 != null) || ($value1 != "")) && $value2 != "" && $value1
!= $value2) { ret false }

if i omit the [value2 != ""] i would still get the same result, right?
because I check if value1 != "" and then I check if value1!=value2
i.e. :

if ((($value1 != null) || ($value1 != "")) && $value1 != value2) { ret
false }

regards, maxim.

steve wrote:
> "Maxim Vexler" wrote:
> > if ((($value1 != null) || ($value1 != "")) && $value2 != "" &&
> $value1
> >
> > != $value2) { ret false }
> >
> > if i omit the [value2 != ""] i would still get the same result,
> right?
> >
> > because I check if value1 != "" and then I check if
> value1!=value2
> > i.e. :
> >
> > if ((($value1 != null) || ($value1 != "")) && $value1 != value2)
> { ret
> >
> > false }
> >
> > regards, maxim.
>
> I believe you are right. And you can simplify as well:
> ($value1 != null) || ($value1 != ""))
> is equal to:
> ($value1 != ’’) [[don’t need the two statements]]
> or if you have doubts, use:
> (strlen($value1) > 0)
>

in fact, and please correct me if I'm wrong :
the logic (($value1 != null) || ($value1 != "")) is totally useless !
because no matter what the input is you always get true from it, right?