Re: Re: Expression evaluation - how is it done?
| From: | HKG) | Date: | Thu, 18 Mar 2004 12:16:45 +0000 |
| Subject: | Re: Re: Expression evaluation - how is it done? | ||
| References: | 1 2 | Groups: | php.windows |
| Request: | Send a blank email to php-windows+get-23181@lists.php.net to get a copy of this message | ||
I asking because i read through the section about expression, but it
was just wining about that $a == 5 if $a = $b and $b = 5, and other
trivial matters. So if you could point me to the manual section you
are referring to, I would appreciate it.
Anyhow, I take your answer that PHP is doing a left-to-right-hand
evaluation of the expression, and stops when it not needed to
evaluate it further. i.e. in the same way as in C/C++.
Thanks for the answer, that all I need to know (for now:).
//Anders
On Thu, 2004-03-18 at 13:12, DvDmanDT wrote:
> It's done the lazy way.. If the whole expression can't return true, it's not
> nessecary to evaluate the right side of the && operator.. In other words,
> my_bool_function will never be called...
>
> See the manual for more..
>
> --
> // DvDmanDT
> MSN: dvdmandt$hotmail.com
> Mail: dvdmandt$telia.com
> "B.A.T. Svensson" <B.A.T.Svensson@lumc.nl> skrev i meddelandet
> news:1079610737.30259.20.camel@ander...
> > Does PHP uses the same expression evaluation as in C/C++?
> >
> > This questions also consider expression with function
> > that returns booleans, typical:
> >
> >
> > if (false && my_bool_function())
> >
> >
> > Will my_bool_function() be evaluated or not in this case?