The same operation on a number of variables.

I have a big number of variables, mostly data from the form.
I want to convert all empty variables into "NULL".
Obviously for each variable I could write:
if (empty($a)) $a=="NULL";
if (empty($b)) $b=="NULL";...and so on....
But let's say I have like a hundred of them.
Is there any way to write it in just a few rows ???

Thanx

re: The same operation on a number of variables.

In article <1n9rwomx8jqem$.dlg@www.okozaoko.pl>, Pawe? <pmg3@op.pl>
wrote:
[color=blue]
> I have a big number of variables, mostly data from the form.
> I want to convert all empty variables into "NULL".
> Obviously for each variable I could write:
> if (empty($a)) $a=="NULL";
> if (empty($b)) $b=="NULL";...and so on....
> But let's say I have like a hundred of them.
> Is there any way to write it in just a few rows ???
>
> Thanx[/color]

If they come from a form, they are part of the $_POST (or $_GET) array,
so you could loop over that.

JP

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re: The same operation on a number of variables.

Pawe³ wrote:[color=blue]
> I have a big number of variables, mostly data from the form.
> I want to convert all empty variables into "NULL".
> Obviously for each variable I could write:
> if (empty($a)) $a=="NULL";
> if (empty($b)) $b=="NULL";...and so on....
> But let's say I have like a hundred of them.
> Is there any way to write it in just a few rows ???[/color]

<?php
$variable_names = array('a', 'b', 'c1', 'c2'/*, ...*/);
foreach ($variable_names as $var)
if (empty($$var)) $$var = 'NULL';
?>

Read all about "variable variables" here:
http://www.php.net/manual/en/languag...s.variable.php
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