call_user_func() vs. $func_name()

[eluser]danmontgomery[/eluser]
[quote author="helmutbjorg" date="1286874403"]To call class methods you need to wrap the parameters into a single array like so:

Code:

// call_user_func(array($class, $function));
call_user_func(array($this->Sample_model->$func_name, $var));

[/quote]

This is incorrect.

Code:

call_user_func(array($this->sample_model, $func_name), $var);

http://php.net/manual/en/function.call-user-func.php