Re: if statement with or comparison (newbie)

No, just try it. Since the returned value cannot have to values at once, whatever it comes it will succeed either one or both and being joined by an or, any single one that succeeds make the whole succeed. Just try it:

Returned value        result
red                            true or true => true
black                    false or true => true
white                    true or false => true

That is why in my e-mail I insisted that the best thing you can do with complex booleans is try to straighten the logic and avoid too many negations, which tend to turn the logic upside down. Satyam ----- Original Message ----- From: "Kevin Murphy" <php@stubborndonkey.com> To: "php" <php-general@lists.php.net> Cc: "JD" <jd_borozo@borozo.com> Sent: Friday, September 08, 2006 11:25 PM Subject: Re: [PHP] if statement with or comparison (newbie)

Shouldn't that be this instead:

     if (($_REQUEST['id'] != "black") OR ($_REQUEST['id'] !=

"white")) {

         echo "wrong color";

     } else {

         echo "right color";

     }

-- Kevin Murphy Webmaster: Information and Marketing Services Western Nevada Community College www.wncc.edu 775-445-3326 On Sep 8, 2006, at 2:28 PM, Prathaban Mookiah wrote:

Let me rephrase it. Your color should be black or white to be the right colour. Is this correct? In that case you should change it to

     if ($_REQUEST['id'] != "black" AND $_REQUEST['id'] != "white") {

         echo "wrong color";

     } else (

         echo "right color";

     }

----- Original Message ----- From: "JD" <jd_borozo@borozo.com> To: <php-general@lists.php.net> Sent: Friday, September 08, 2006 5:03 PM Subject: [PHP] if statement with or comparison (newbie)

I'm trying to set up a simple conditional, something like this: If my_variable is NOT equal to (black or white) echo "wrong color" else echo "right color" Here is what I have tried:

    if ($_REQUEST['id'] != ("black" or "white")) {

        echo "wrong color";

    } else (

        echo "right color";

    )

However, no matter what I enter, I always get response "right color". I should add that if I change the if statement to:

    if ($_REQUEST['id'] != ("black"))

then I get "right color" when I enter "black" and "wrong color" for everything else. Would you please point out what's the trivial thing I'm missing here... jd -- PHP General Mailing List (http://www.php.net/) To unsubscribe, visit: http://www.php.net/unsub.php

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