Problem with class static variables

r_honey

This problem has driven me nuts in the last two days....

I have a file config.php having a class:
class config
{
public static $Image="/images";
}

Another file layout.php is as:
require_once("config.php");

class layout
{

public function writeLogo()
{
$text = <<<ABC
<img class="Logo" title="My Logo" alt="Logo" src="{config::$Image}/Logo.gif" />
ABC;

 echo($text);

}
}

The problem is that {config::$Image} is evaluating to {config::}.
Can anyone explain me why & what's the solution???

laserlight

hmm... the problem seems to be that the heredoc syntax (and double quote limited strings, for that matter) recognises $Image as a variable, but regards the preceding "config::" as just text. I guess that the easiest workaround would be to just use concatenation:

$text = '<img class="Logo" title="My Logo" alt="Logo" src="' . config::$Image . '/Logo.gif" />';

r_honey

As I said, I have been working to get it right for 2 days... And I have tried most things.

"' . config::$Image . '/Logo.gif"

appears in the output as "' . config:: . '/Logo.gif".

I have even tried

"'"  . config::$Image .  "/Logo.gif'"

and other possible variations...

alimadzi

Try setting the static variable equal to a local variable in that function and then using that local variable in your heredoc block. It's a kludge, but it should work.

Protato

r_honey,
What laserlight is trying to point out, is that it's the use of heredoc that is preventing it from accessing your config variable. There are two ways you can fix this, don't use heredoc

//this
$text = "blah blah blah";
//insted of
$text = <<<ABC
                 blah blah blah
             ABC;

Or assign your config variable as a variable in the method, so it can be accessed when useing heredoc.

$cfgImage = config::$Image;
$text = <<<ABC
<img class="Logo" title="My Logo" alt="Logo" src="$cfgImage"/Logo.gif" />
ABC;

r_honey

Yes, I also finally found out that last night....
Because PHP uses a slightly different syntax & implementation for OOPs, I was searching php.net & debugging my code for 2 days to see if I was not using the syntax properly...

Seems like the problem rests with parsing static variables within a heredoc...
Anyways, thanx!!!