RE: [PHP] different and logic between PHP4 and PHP5

On 14 March 2007 01:00, Larry Garfield wrote: > 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. Ahem. Yes it is. At http://php.net/manual/en/language.types.string.php#language.types.string.casting it says: > A boolean TRUE value is converted to the string "1", the > FALSE value is represented as "" (empty string). This way > you can convert back and forth between boolean and string > values. And I can testify from personal experience that this has been true since the very early days of 4.0.x (in fact, I still have a 4.0.5 installation hanging around that I tested it on...!!), so I do not know where the *BLEEP* the OP can have been getting that 0 from. Cheers! Mike --------------------------------------------------------------------- Mike Ford, Electronic Information Services Adviser, Learning Support Services, Learning & Information Services, JG125, James Graham Building, Leeds Metropolitan University, Headingley Campus, LEEDS, LS6 3QS, United Kingdom Email: m.ford@leedsmet.ac.uk Tel: +44 113 283 2600 extn 4730 Fax: +44 113 283 3211 To view the terms under which this email is distributed, please go to http://disclaimer.leedsmet.ac.uk/email.htm