You are COMPLETELY wrong here. isset() is designed to check if a variable is
SET - NOT if it has something in it. empty() is designed for strings NOT for
ints - so if it's set to 0 it will fail. Finally in PHP 4 + you have problems
when you do checks and variables aren't set.
I do this, like I said before, because the extra 1 billionth of a second is
worth the overhead. I've programmed for sites ranging from a few hundered hits
a day to a few million hits a day and this works ALL the time.
--Joe
On Sat, Feb 24, 2001 at 03:15:59PM +0900, PHPBeginner.com wrote:
> I don't agree with you in here,
>
> you usually know what kind of variable you're checking, so strlen() will
> work just as well as
>
> $var ? 'OK' : 'Empty'
>
> will work or the isset() - common, it was made for checking the variables -
> use it.
>
> strlen() is in fact an overhead, why would you allow your design to be some
> sort of untraditional? I don't think there's any necessity for it
>
> a "good design" often would be something like this:
>
> $var = 'whatever';
>
> if($var)
> ...do this
> else
> ERROR('no var') // some your func to output the error mess or to continue
> with debugging
>
> in most cases it will work better and simpler for you without spending these
> bazillions of important for every developer seconds.
>
>
>
> Sincerely,
>
> Maxim Maletsky
> Founder, Chief Developer
>
> PHPBeginner.com (Where PHP Begins)
> [EMAIL PROTECTED]
> www.phpbeginner.com
>
>
>
>
>
> -----Original Message-----
> From: Joe Stump [mailto:[EMAIL PROTECTED]]
> Sent: Friday, February 23, 2001 3:07 AM
> To: Steve Edberg
> Cc: Jacky@lilst; [EMAIL PROTECTED]
> Subject: Re: [PHP] isset()
>
>
> I stand firm on strlen() for the following reasons ...
>
> if(!$var) will sometimes act strangely (has for me in the past) when
> variables
> are set to something other than what you are expecting.
>
> if(isset($var)) will return true if your text field is declared but not
> filled
> in.
>
> if(empty($var)) will return true if $var is set to 0 (for obvious reason) so
> is
> only good for certain instances.
>
> strlen() on the other hand converts the variable to a string and returns a
> count
> of characters. It's never failed or acted funky. For this reason I use it
> religiously.
>
> Others might say "well it's extra overhead" to which I reply "I'll take an
> extra
> bazillionth of a second to know for sure I have what I need"
>
> --Joe
>
> On Thu, Feb 22, 2001 at 08:18:22AM -0800, Steve Edberg wrote:
> > I would do this:
> >
> > if (!$AgeChild) $AgeChild = 'NA';
> >
> > More compact, easier to read (to me, anyway). This presumes that a
> > value of '' (empty string, interpreted by PHP as false) is NOT a
> > valid value here.
> >
> > As far as your sniplet goes, it is possible that there may be some
> > PHP type-casting issues here, depending on: whether $AgeChild is
> > numeric or string; the fact that the STRING "false" isn't equivalent
> > to the CONSTANT false, the use of == vs. ===.
> >
> > Time to check out the docs - specifically the types and variables
> > sections (also the functions->variables section)...
> >
> > - steve
> >
> >
> >
> > At 5:07 PM -0600 2/22/01, Jacky@lilst wrote:
> > >People
> > >I tried to check if teh field has set a vaule in it before submit
> > >using isset with the sniplet below
> > >
> > >if ((isset($AgeChild))=="false") {
> > >$AgeChild = "NA";
> > >}
> > >
> > >The resule is that it always displays NA whether or not it has vaule
> > >in the field, what is the correct way of using isset for this
> > >purpose? Or should I use empty() ?
> > >Jack
> > >[EMAIL PROTECTED]
> > >"There is nothing more rewarding than reaching the goal you set for
> yourself"
> >
> >
> > --
> > +--- "They've got a cherry pie there, that'll kill ya" ------------------+
> > | Steve Edberg University of California, Davis |
> > | [EMAIL PROTECTED] Computer Consultant |
> > | http://aesric.ucdavis.edu/ http://pgfsun.ucdavis.edu/ |
> > +-------------------------------------- FBI Special Agent Dale Cooper ---+
> >
> > --
> > PHP General Mailing List (http://www.php.net/)
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>
> --
>
> ----------------------------------------------------------------------------
> ---
> Joe Stump, PHP Hacker,
> -o)
> http://www.miester.org http://www.care2.com
> /\\
> "It's not enough to succeed. Everyone else must fail" -- Larry Ellison
> _\_V
> ----------------------------------------------------------------------------
> ---
>
>
> --
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>
--
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http://www.miester.org http://www.care2.com /\\
"It's not enough to succeed. Everyone else must fail" -- Larry Ellison _\_V
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