Re: different and logic between PHP4 and PHP5

On Tuesday 13 March 2007 7:50 am, Vieri wrote: > <?php > //$b=3; > $c=3; > $a=($b and $c); > echo "A = ".$a; > ?> > > in PHP4 I get: > A = 0 > and in PHP5 I get: > A = > I could call this lazyness on our part or code > portability through PHP versions or better yet, bad > inherited coding right from the start. A little bit of each, I think. :-) "and", like &&, is a boolean operation. It will return either TRUE or FALSE. The string representation of TRUE and FALSE is, AFAIK, not defined. It looks like the effect of toString(boolean) changed from "false becomes 0" to "false becomes empty string". That's quite annoying when both are logically false but could have side-effects like this. OTOH, relying on a boolean data type to have a given string value in the first place is a bad idea to start with. :-) Find whoever you inherited the code from and shoot him. (Really, I know how badly inherited code can suck.) -- Larry Garfield AIM: LOLG42 larry@garfieldtech.com ICQ: 6817012 "If nature has made any one thing less susceptible than all others of exclusive property, it is the action of the thinking power called an idea, which an individual may exclusively possess as long as he keeps it to himself; but the moment it is divulged, it forces itself into the possession of every one, and the receiver cannot dispossess himself of it." -- Thomas Jefferson