RE: [PHP] Alternate Colors in Rows ($r=!$r)
| From: | Robert Cummings | Date: | Fri, 05 Oct 2007 18:53:05 +0000 |
| Subject: | RE: [PHP] Alternate Colors in Rows ($r=!$r) | ||
| References: | 1 | Groups: | php.general |
| Request: | Send a blank email to php-general+get-262837@lists.php.net to get a copy of this message | ||
On Fri, 2007-10-05 at 13:46 -0500, Jay Blanchard wrote:
> [snip]
> >
> > But why does the ($r=!$r) ternary condition work?. (I understand
> > that it DOES but not WHY.)
> [/snip]
>
> Check this out -
> http://us3.php.net/manual/en/language.operators.assignment.php
>
> It says the value of the assignment is the value assigned, so maybe
> assignments to anything other than 0 (or false) return true while
> assignments to 0 (or false) return false.
The value of the expression is the value assigned. Since the ! operator
will always return a boolean then the assigned value is going to be a
boolean. So $r will always contain a boolean for the purposes of the
ternary operation.
Cheers,
Rob.
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