Function parameters

Anon

Hi, I am trying to pass a callback function as a parameter. That is working fine, but now I want to parcel everything into a class, and I can't seem to assign the function I've passed in to another variable.
Example:

class MyClass
{
var $GetValFunc;

function MyClass($getvalfunc)
{
  $this->GetValFunc = $getvalfunc;

  // Works fine
  $getvalfunc(); 

  // Errors with 'call to undefined function'
  $this->GetValFunc();     
}

function RunCallback()
{
// Obviously, this doesn't work either...
return $this->GetValFunc();
}
}

Anon

Okay, I have a nasty nasty workaround that will probably vanish in the next build of PHP. Anyone got any better ideas?

class MyClass
{
var $GetValFunc;

function MyClass($getvalfunc)
{
$this->GetValFunc = array(&$getvalfunc);
}

function RunCallback()
{
return $this->GetValFunc0;
}
}

Anon

Dude, you're never defining the funcition. In this example

class MyClass
{
var $GetValFunc;

function MyClass($getvalfunc)
{
$this->GetValFunc = array(&$getvalfunc);
}

function RunCallback()
{
return $this->GetValFunc0;
}
}

You're creating an instance var of GetValFunc.

You need:
class Rob {
function GetValFunc() {
return 0;
}

function RunCallBack {
return $this->GetValFunc();
}
}

That's the answer to your question, but it seems like you shouldn't be doing this way.

Anon

The problem is that you are using GetValFunc as if it were a function and not a variable.

Your one function should look like this:

function RunCallBack {
return $this->GetValFunc;
}

No () at the end of your varialbe GetValFunc

Anon

So how would you pass parameters to the callback function?

Anon

I don't understand your question. What exactly is it that you want to do?

If you wanted to pass something into the call back function you'd do it like you would calling any class function

$ret_var = $class->RunCallBack($var);