Check to see if value is NULL

[Allen4172]

I've tried a couple of things and can't seem to get it to work properly.

I'm attempting to check if a value is NULL. I've tried things like:

[code]

if($variable$ == NULL) {
   $php_var = 0;}
[/code]

The variable isn't from PHP, its from a CMS system, that uses its variables as $something$. With this system, if nothing is typed in, its just blank spaces and the php would see:

[code]
if(     == NULL){
   $php_var = 0;}

[/code]

I'm trying to make it to where, if nothing was entered in, and the script sees the blank, then it would auto put it as 0. Any help or ideas would be appreciated. :)

[alpine]

im not sure i follow, but in a lack of responce - her is a suggestion on setting variables if they don't exist or is false (0):
[code]
if(!$var)
{
$var = "whatever";
}
[/code]

[Michael4172]

Thanks for the reply.

In that scenerio when that field is false ($example$) the php sees:

[code]
if(!)
{
$var = "whatever";
}
[/code]

It then gives an error of [b]Parse error: parse error, unexpected ')'[/b]

[dsk3801]

[code]
$var = '$variable$';
if (strlen($var) == 0)
{
    $var = 0;
}
[/code]

[Orio]

[a href=\"http://www.php.net/manual/en/function.is-null.php\" target=\"_blank\"]http://www.php.net/manual/en/function.is-null.php[/a]
....

Orio.

[Michael4172]

[!--quoteo(post=375438:date=May 19 2006, 11:24 PM:name=Dave K.)--][div class=\'quotetop\']QUOTE(Dave K. @ May 19 2006, 11:24 PM) [snapback]375438[/snapback][/div][div class=\'quotemain\'][!--quotec--]
[code]
$var = '$variable$';
if (strlen($var) == 0)
{
    $var = 0;
}
[/code]
[/quote]

Thanks Dave, that is exactly what I needed and it now works :) I tried something similar earlier, but I didn't put the single quotes around $variable$ from above.

[Houdini]

There is always empty() as per [a href=\"http://us3.php.net/empty\" target=\"_blank\"]empty()[/a] in the PHP Manual.