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 ---+
>
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/\\
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