Re: null value and isset
| From: | - Edwin - | Date: | Wed, 28 Jan 2004 04:31:06 +0000 |
| Subject: | Re: null value and isset | ||
| References: | 1 | Groups: | php.general |
| Request: | Send a blank email to php-general+get-176006@lists.php.net to get a copy of this message | ||
Hi,
On Wed, 28 Jan 2004 11:17:52 +1100 (EST)
<daniel@electroteque.org> wrote:
> Hi there regarding out discussions before about using isset, i
> set function params which are false intitalially as null ie
> function foo ($bar = null) , anyway $bar remains true both ways
> if i do isset($bar), i didnt notice this assuming it was ok,
> now the scripts are buggered, it was originally like if($bar)
> which worked fine. Is there a better way to check ?
Hmm.. It's always FALSE here. (Unless there something wrong with
my test code.)
Here's what I used: (Run on the command line...)
<?php
function check_if_set ($my_null_variable = NULL) {
if (isset($my_null_variable)) {
echo 'Yes!';
} else {
echo 'No!';
}
}
check_if_set();
echo "\n";
?>
--
- E -
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