Re: [PHP] empty variable
Just to clear up, there is no isempty() function - the correct function
is empty() and its details can be found here: http://uk.php.net/empty
Cheers
Chris
-{ Rene Brehmer }- wrote:
At 01:54 20-09-2004, Chris Mach wrote:
What is the best way to determine if a variable is empty?
I have a feeling there is a better way than the way I'm doing it now...
if ($variable == "")
there's 2:
if (isset($variable))
or
if (isempty($variable))
what's most appropriate depends on how the variable is set or not
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Re: [PHP] empty variable
if youdo
if($var) {
}
and var doesnt exist at all, thats an error.
if(isset($var)) {
}
will test to see if $var exists, but will not test the value of var, so
$var could be blank...
Jason
"Pat" <[EMAIL PROTECTED]> wrote:
>
> So, you have to know, first, what is your meaning of your empty variabe:
> null, 0, "", array()?
>
> For example, "$var = 0;", empty($var) says true... but you?
>
> "Jason Davidson" <[EMAIL PROTECTED]> wrote in message
> news:[EMAIL PROTECTED]
> > as suggeted the isset and empty functions are usefull,
> > or if you know it may be set, but could be empty, how about just
> > if($variable) {
> >
> > }
> >
> > that is the same as
> > if($var == "")
> >
> > "Chris Mach" <[EMAIL PROTECTED]> wrote:
> > >
> > > What is the best way to determine if a variable is empty?
> > >
> > > I have a feeling there is a better way than the way I'm doing it now...
> > >
> > > if ($variable == "")
> > >
> > >
> > > ---
> > > Outgoing mail is certified Virus Free.
> > > Checked by AVG anti-virus system (http://www.grisoft.com).
> > > Version: 6.0.766 / Virus Database: 513 - Release Date: 18-Sep-2004
>
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Re: [PHP] empty variable
So, you have to know, first, what is your meaning of your empty variabe:
null, 0, "", array()?
For example, "$var = 0;", empty($var) says true... but you?
"Jason Davidson" <[EMAIL PROTECTED]> wrote in message
news:[EMAIL PROTECTED]
> as suggeted the isset and empty functions are usefull,
> or if you know it may be set, but could be empty, how about just
> if($variable) {
>
> }
>
> that is the same as
> if($var == "")
>
> "Chris Mach" <[EMAIL PROTECTED]> wrote:
> >
> > What is the best way to determine if a variable is empty?
> >
> > I have a feeling there is a better way than the way I'm doing it now...
> >
> > if ($variable == "")
> >
> >
> > ---
> > Outgoing mail is certified Virus Free.
> > Checked by AVG anti-virus system (http://www.grisoft.com).
> > Version: 6.0.766 / Virus Database: 513 - Release Date: 18-Sep-2004
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Re: [PHP] empty variable
as suggeted the isset and empty functions are usefull,
or if you know it may be set, but could be empty, how about just
if($variable) {
}
that is the same as
if($var == "")
"Chris Mach" <[EMAIL PROTECTED]> wrote:
>
> What is the best way to determine if a variable is empty?
>
> I have a feeling there is a better way than the way I'm doing it now...
>
> if ($variable == "")
>
>
> ---
> Outgoing mail is certified Virus Free.
> Checked by AVG anti-virus system (http://www.grisoft.com).
> Version: 6.0.766 / Virus Database: 513 - Release Date: 18-Sep-2004
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Re: [PHP] empty variable
At 01:54 20-09-2004, Chris Mach wrote: What is the best way to determine if a variable is empty? I have a feeling there is a better way than the way I'm doing it now... if ($variable == "") there's 2: if (isset($variable)) or if (isempty($variable)) what's most appropriate depends on how the variable is set or not -- Rene Brehmer aka Metalbunny If your life was a dream, would you wake up from a nightmare, dripping of sweat, hoping it was over? Or would you wake up happy and pleased, ready to take on the day with a smile? http://metalbunny.net/ References, tools, and other useful stuff... Check out the new Metalbunny forums at http://forums.metalbunny.net/ -- PHP General Mailing List (http://www.php.net/) To unsubscribe, visit: http://www.php.net/unsub.php
Re: [PHP] empty variable
What is the best way to determine if a variable is empty? I have a feeling there is a better way than the way I'm doing it now... if ($variable == "") You could try the empty() or isset() functions, depending upon exactly what you're wanting to test. See the manual for descriptions of both. Larry -- PHP General Mailing List (http://www.php.net/) To unsubscribe, visit: http://www.php.net/unsub.php
[PHP] empty variable
What is the best way to determine if a variable is empty? I have a feeling there is a better way than the way I'm doing it now... if ($variable == "") --- Outgoing mail is certified Virus Free. Checked by AVG anti-virus system (http://www.grisoft.com). Version: 6.0.766 / Virus Database: 513 - Release Date: 18-Sep-2004
RE: [PHP] Empty Variable Values Between Scripts
[snip] Is there something that has to be done to php so that it sees these variables? Is this an operating system issue? Anything else I should be looking at? [/snip] register globals is off, so all of your variables are in the POST array $_POST['first'] $_POST['last'] etc. Replace all your variable references with the appropriate array references and you'll be off to the races. -- PHP General Mailing List (http://www.php.net/) To unsubscribe, visit: http://www.php.net/unsub.php
[PHP] Empty Variable Values Between Scripts
Hello:
I am just starting to learn php and have been reading tutorials that I
have found on the Internet.
The one I am reading now is:
http://www.freewebmasterhelp.com/tutorials/phpmysql/1
The problem I am having is with these two scripts.
Script 1:
(This script displays some forms to type in Contact information.)
First Name:
Last Name:
Phone:
Mobile:
Fax:
E-mail:
Web:
Script 2:
(This script (saved as insert.php) is called by Script 1 after
information has been typed into the above form.)
Database Output";
$i=0;
while ($i < $num) {
$first=mysql_result($result,$i,"first");
$last=mysql_result($result,$i,"last");
$phone=mysql_result($result,$i,"phone");
$mobile=mysql_result($result,$i,"mobile");
$fax=mysql_result($result,$i,"fax");
$email=mysql_result($result,$i,"email");
$web=mysql_result($result,$i,"web");
echo "$first $lastPhone: $phoneMobile: $mobileFax:
$faxE-
mail: $emailWeb: $web";
++$i;
}
?>
I have created the database Contacts. It is a MySQL database. I open
the first script and enter my contact data, press Submit, and I believe
the second script is then called.
I go and check my Contacts database and a new record has been added, but
it is empty. I am guessing that the values assigned in the first script
are not being seen by the second script and that the empty variables are
being written to the database.
Is there something that has to be done to php so that it sees these
variables? Is this an operating system issue? Anything else I should be
looking at?
Other data:
Server Machine: Sun Sparc 20 with Solaris 2.6, Apache 2.0.49, MySQL
4.0.17, PHP 4.3.7.
Remote Machine: Homebuilt running MS Windows 2000, Mozilla Firebird 0.7
browser
If there is a better list for beginner questions, please let me know.
Thanks.
--
Frank Hahn
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