"Fatal error: Using $this when not in object context" but code IS in object context

Question

I'm getting the old familiar "Fatal error: Using $this when not in object context" referring to $this->test = 'test'; in the following class:

class Example {
    public $test;
    public function index() {
        $this->test = 'test';
    }
}

The class method is called via call_user_func_array(array('example', 'index'), $params);. I can only assume that call_user_func_array has for some reason decided to call the index method as static e.g. example::index()? However I haven't figured out a fix for this and oddly I've not had a problem with it until recently.

Linus Kleen · Accepted Answer · 2011-01-18 12:29:09Z

5

This works:

$obj = new Example();
call_user_func_array(array($obj, 'index'), $params);

Your code basically does:

Example::index($params);

which calls index statically, which you correctly assumed.

answered Jan 18, 2011 at 12:29

Linus Kleen

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2 Comments

Chris Kempson Over a year ago

Forgot to mention I'm making use of autoloading sorry. I was under the impression that call_user_func_array would would without having to instantiate the class manually. Is this not the case?

Linus Kleen Over a year ago

@Riddian Nope. It's not. There would be no way to actually perform static calls. BTW: this behavior goes for all PHP functions taking callbacks (like usort and the likes). See Pseudo-types and variables....

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