Re: [PHP] assigning NULL to a variable

2004-04-07 Thread Marek Kilimajer 
William Lovaton wrote:
El mar, 06-04-2004 a las 07:41, Marek Kilimajer escribió:

Andy B wrote:

how would you assign NULL to a variable if its original value is ? otherwise leave it with its value...
if($var === '') $var = NULL;


what about:  if ($var == '') unset($var);

No - NULL is not the same as unset() and the condition would evaluate to 
true even if $var === 0

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Re: [PHP] assigning NULL to a variable

2004-04-07 Thread Justin Patrin 
Marek Kilimajer wrote:

William Lovaton wrote:

El mar, 06-04-2004 a las 07:41, Marek Kilimajer escribió:

Andy B wrote:

how would you assign NULL to a variable if its original value is ? 
otherwise leave it with its value...


if($var === '') $var = NULL;


what about:  if ($var == '') unset($var);

No - NULL is not the same as unset() and the condition would evaluate to 
true even if $var === 0
And if $var = false or null or '0'

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paperCrane Justin Patrin
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Re: [PHP] assigning NULL to a variable

2004-04-06 Thread Marek Kilimajer 
Andy B wrote:
how would you assign NULL to a variable if its original value is ? otherwise leave it with its value...
if($var === '') $var = NULL;

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Re: [PHP] assigning NULL to a variable

2004-04-06 Thread William Lovaton 
El mar, 06-04-2004 a las 07:41, Marek Kilimajer escribió:
 Andy B wrote:
  how would you assign NULL to a variable if its original value is ? otherwise 
  leave it with its value...
 
 if($var === '') $var = NULL;

what about:  if ($var == '') unset($var);


-William

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[PHP] assigning NULL to a variable

2004-04-05 Thread Andy B 
how would you assign NULL to a variable if its original value is ? otherwise leave 
it with its value...

the form im working on has a date field called date on the form itself. that date 
will get turned into $_SESSION[add][date] on the next page...
i want it so if the person filling out the form didnt leave a date (left date field 
blank) then it should be NULL so the mysql table will insert the current date...

so far i have this code:
if(empty($_SESSION['add']['date'])){
$_SESSION['add']['date']=NULL//or should it = FALSE??
}
//if its already filled do nothing else to it 

is there a better way to do this than this way?