[RESOLVED] Callback Functions

I'm having an issue with callback functions, specifically storing them...

If I have a class:

PHP Code:

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class myObject{

    protected $callback;

    public function __construct($callbackFunction){
        $this->callback = $callbackFunction;
        .
        .
        .
    }

    public function doSomething($args){
        if(is_callable($this->callback)){
            return $this->callback($args);
        }
    }

} 


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And I try doing this:

PHP Code:

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function foo($arg){
    return strtoupper($arg);
}

$myNewObject = new myObject("foo");
echo $myNewObject->doSomething("bar"); //should echo BAR 


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I end up with an error:

Code:

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Fatal Error: Call to undefined method MyObject::callback() in ...

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The is_callable() is succeeding, but the actual callback function call is the line failing with that error.

This isn't exactly what I'm doing obviously, but its a replicate of the code. Any ideas?

you have to tell PHP that you're calling $this->callback (the variable), not the method callback() of $this.

PHP Code:

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return {$this->callback}(); 


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PHP Code:

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return {$this->callback}(empty($this->buffer) ? $template : $this->buffer); 


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It's not liking that.. unexpected {

I wanna stray from call_user_func() too, because that is hugely processor intensive.

oh. store it in a non-class variable then:

PHP Code:

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$callback = $this->callback;
$callback(); 


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