Re: $string . "text" not working properly

On Mon, 13 Nov 2000, Brian T. Allen wrote: > Hi *, > > Consider the following code, which I think should work: > > <? > $IMAGE = "<img src=\"/images/error.gif\">"; > $MESSAGE = "Message:<br>\n"; > $AMOUNT = "10"; > $USED = "6"; > $MESSAGE .= $IMAGE . "Only $" . $AMOUNT - $USED . " > available.<br>\n"; > echo $MESSAGE; > ?> > > This should output: > > Message:<br> > <img src=\"/images/error.gif\">Only $4 available.<br> > > But instead it outputs: > Message:<br> > -6 available.<br> > > Notice that it drops the $IMAGE and "Only $", not to mention calculating the math > incorrectly (actually, it drops $AMOUNT resulting in an accurate but unwanted "0 - 6" > calculation. > > I have long suspected problems with the $VAR = $START . " hello world " . $END; > syntax, but this is the first easily reproducible instance of it. > > I have used the following as a workaround, but it is of course unacceptable in the long-run: > $MESSAGE .= $IMAGE; > $MESSAGE .= "Only $"; > $MESSAGE .= $AMOUNT - $USED; > $MESSAGE .= " available.<br>\n"; > > Any thoughts or suggestions? > > Brian > "-" and "." have the same precedence. But parentheses around your subtraction. -- Ignacio Vazquez-Abrams <ignacio@openservices.net>