[PHP] Re: Having problems with an IF statement, just doesn't make sense

[Nadim Attari]

Paying attention to this line:
> Also if I use !isset it returns true with a null value for $theme

Well this is clear in the manual:
isset() will return FALSE if testing a variable that has been set to NULL
So !isset($a_Null) = !FALSE = TRUE

>From PHP Manual
=
$var = 0;

if (empty($var)) {  // evaluates true
echo '$var is either 0 or not set at all';
}

if (!isset($var)) { // evaluates false
echo '$var is not set at all';
}

Read manual: empty() and isset()



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[PHP] Re: Having problems with an IF statement, just doesn't make sense

[Valentina]

I've tried...print nothing in my browser then it seems to me correct.
The condition "ELSE" is satisfied.
bye.

codeused:
if (isset($theme)) {
  print("Current theme is $theme");
  require "content/header_$theme.php";
} else {
  print("$theme");
  require "content/header.php";
}
codeused.

"Bobb" <[EMAIL PROTECTED]> ha scritto nel messaggio
news:[EMAIL PROTECTED]
> I am using the following if statement ...
>
> if (isset($theme)) {
>   print("Current theme is $theme");
>   require "content/header_$theme.php";
> } else {
>   print("$theme");
>   require "content/header.php";
> }
>
> now one would think that if it didn't return true that the else
> statement wouldn't print anything for $theme ... but it does. Also if I
> use !isset it returns true with a null value for $theme ... This doesn't
> make sense to me ... maybee I am doing something wrong, if I am someone
> please correct me heh.
>
> --
> /*  BoBB
>  *  AIM: Jodokast49 ICQ: 151495596
>  *  Jabber: [EMAIL PROTECTED]
>  *  http://knightsofchaos.com/~BoBB/new/
>  *  I geek, therefor I am.
>  */



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[PHP] Re: Having problems with an IF statement, just doesn't make sense

[Harry Wiens]

> if (isset($theme)) {
>   print("Current theme is $theme");
>   require "content/header_$theme.php";
if you try to send headers in "header_$theme.php", this wont work, because
you can't send headers after you've printed or echoed something.
try this:

if (isset($theme)) {
  require "content/header_$theme.php";
  print("Current theme is $theme");
} else {
  require "content/header.php";
  print("$theme");
}


mfg.
harry wiens



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