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Posted by Tyno Gendo on 04/10/07 07:38
Vince Morgan wrote:
> "Shooter" <SDshooter@hotmail.com> wrote in message
> news:46196360$0$5759$4c368faf@roadrunner.com...
>> I'm having trouble setting up a while loop, and I think I'm creating
>> overlapping brackets. I'm trying to set up a script to check for up to 3
>> images to display on a profile page, then put a notice at the bottom. My
>> initial efforts either get a blank page or the notice appearing a few
>> hundred times. Below is my original (working) script to display a single
>> image. After that is my attempts at adding a while loop. Is there a better
>> way of doing this??
>
>> Trying to add a loop:
>>
>> //start imagename function
>> //begin new code
>> $imagenum=1;
>> while ($imagenum<4) {
>> //end new code
>> $imagename = "$lastname$firstname$imagenum";
>> $imagename = str_replace(" ", "","$imagename");
>> //end imagename function
>> //$filename = '../images/$imagename.jpg';
>> $image_info =
>> @getimagesize("http://www.mydomain.org/images/$imagename.jpg");
>> $type=$image_info[2];
>> if ($type == 0) {
>> // file_exists(realpath($filename)); {
>> print " ";
>> } else {
>> print "<IMG SRC=\"../images/$imagename.jpg\"><BR>";
>> $imagenum = $imagenum++;
>> } // end while loop
>> print "<FONT color=\"#000000\" face=\"Arial, Helvetica, sans-serif\"
>> size=\"1\">
>> © $firstname $lastname. All Rights Reserved.</FONT>";
>> }
>>
> Sorry to highjack the OP.
> I find the above very curious personaly.
> I could be wrong, but I thought "++" had a higher precedence than "=", in
> fact I'm very sure it does.
> However, having said that, "$imagenum++" is a post-increment, which would
> suggest that although the "++" operator has higher precedence the
> incrementation should occure after the assignment.
> Although I have never used a construct such as $val = $val++, I would have
> thought that after the assignment, the next operation would have been the
> increment. If that were actualy true then I would expect the value to have
> incremented by one before the next loop iteration regardless.
> A test shows it doesn't, so I'm wrong.
> Trying to actualy work out what is going on in the expression in question
> makes my brain hurt. It seems that the increment is being discarded
> altogether.
> Is this actualy an example of undefined behaviour?
> Vince Morgan
>
>
I thought same as you Vince, but seemingly it doesn't leave it
incremented. I've never used that kind of assignment either.
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