Re: RES: [PHP] inexplicable behaviour SOLVED

Richard Quadling wrote: > 2009/4/27 9el <lenin@phpxperts.net>: > >>> Thanks for the clarification, Mike. In my ignorance, I was under the >>> impression that the right side of the equation was only for the use of >>> the left part. How stupid of me. So what I should have been doing was >>> $Count1 = $Count + 1; right? >>> >>> > > $Count1 = $Count++; > > is not the same as > > $Count1 = $Count + 1; > > > <?php > $Count1 = 100; > echo "Start with $Count1", PHP_EOL; > $Count1 = $Count1++; > echo "For \$Count1 = \$Count1++; the value in \$Count1 is $Count1", PHP_EOL; > $Count1 = $Count1 + 1; > echo "For \$Count1 = \$Count1 + 1; the value in \$Count1 is $Count1", PHP_EOL; > > > outputs ... > > Start with 100 > For $Count1 = $Count1++; the value in $Count1 is 100 > For $Count1 = $Count1 + 1; the value in $Count1 is 101 > > > This shows that post-inc during an assignment does not affect the > value assigned. > > > Something that I thought would happen was if I ... > > <?php > $Count1 = 100; > echo $Count1 = $Count1++, PHP_EOL; > echo $Count1, PHP_EOL; > > I thought I'd get ... > > 101 > 100 > > but I get > > 100 > 100 > > I thought the ++ would happen AFTER the assignment and the ++ to the > value of the assignment. But this is not the case. > > >> $Count = $Count + 1; is exactly(?) same as $Count++; Â or ++$Count >> But not exactly same. Â PostFix notation adds the value after assigning. >> PreFix notation adds the value right away. >> But optimized programming argues about how machine is coded nowadays. >> >> >> >>> Anyway, I don't need that statement anymore as I found the error of my >>> ways and have corrected it. And behold, the light came forth and it >>> worked. :-) >>> >>> >> Regards >> >> Lenin >> >> www.twitter.com/nine_L >> www.lenin9l.wordpress.com >> Thanks. That is really a nice eye-opener. Phil -- Hervé Kempf: "Pour sauver la planète, sortez du capitalisme." ------------------------------------------------------------- Phil Jourdan --- pj@ptahhotep.com http://www.ptahhotep.com http://www.chiccantine.com/andypantry.php