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Posted by kay on 10/10/85 11:51
Ian Davies написав:
> >This way, the condition only applies when both sub-conditions are true
> (both
> >fields are non-empty);
>
> Thats exactly what I want only one field should have something in it and
> both fields should NOT be empty at the same time. But it doesnt work.
>
> Ian
>
>
> "Janwillem Borleffs" <jw@jwscripts.com> wrote in message
> news:44a0642c$0$24649$dbd4b001@news.euronet.nl...
> > Ian Davies wrote:
> > > if ((isset($_POST['Link']) && $_POST['Link'] !=='') &&
> > > (isset($_POST['uploadedfile']) && $_POST['uploadedfile'] !=='')) {
> > > $error_msg.="<br>You can't select to upload a link and a file at the
> > > same time.";
> > >
> >
> > This way, the condition only applies when both sub-conditions are true
> (both
> > fields are non-empty); replace the && between the sub-conditions with ||
> >
> > if ((isset($v) && $v !=='') || (isset($v2) && $v2 !=='')) {
> > ...
> > }
> >
> > > curiously the following works
> > >
> > > if(empty($_POST['Link']) || $_POST['Link'] ='' &&
> > > empty($_FILES['uploadedfile']) || $_FILES['uploadedfile'] ='') {
> > > $error_msg.="<br>You didn't select whether to upload a link or a
> > > file."; }
> > >
> >
> > That's because with the ||, only one test has to pass. Also note that you
> > are not compatring values (==) but assigning them (=).
> >
> >
> > JW
> >
> >
> >
The boolean result of initialization the variables in 'if' condition
is always 'true' so the code like
if ( (...||...||...||$a=''||...) && (...||...||...||$b=''||...)&&
..... (...||...||...||$z=''||...))
will be always true as Janwillem Borleffs mentioned.
Maybe you meant $Post['Link']=='' in your code?
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