Re: [RFC] Comparison and conversion inconsistency - need more info

Hi all, On Mon, Nov 11, 2013 at 4:49 AM, Yasuo Ohgaki <yohgaki@ohgaki.net> wrote: > I really surprised by myself that I've never bitten by the > misunderstanding more than 10 years. > Anyway, the manual is better to explain explicitly > > TRUE always evaluated as 1 while > NULL/FALSE is evaluated as 0 or least. > > Sorry for the confusion. > > Any comments? > I still didn't get it right :( [yohgaki@dev ~]$ php -r "var_dump((TRUE > 100));" bool(false) [yohgaki@dev ~]$ php -r "var_dump((TRUE < 100));" bool(false) [yohgaki@dev ~]$ php -r "var_dump((TRUE > -100));" bool(false) [yohgaki@dev ~]$ php -r "var_dump((TRUE < -100));" bool(false) TRUE/FALSE only evaluated as 1/0 otherwise always return FALSE in expression. [yohgaki@dev ~]$ php -r "var_dump((NULL < -100));" bool(true) [yohgaki@dev ~]$ php -r "var_dump((NULL > -100));" bool(false) NULL behaves differently, though. Because min()/max() has to use < or > results became depends on how it compares. Regards, -- Yasuo Ohgaki yohgaki@ohgaki.net