Question

Given this line of code to callback a function and the callback function itself:

Class MyClass {
    public function doThings() {
        $this->gearman->client->setCompleteCallback("workerCompleted");
    }

    public function workerCompleted() {
        echo "worker is completed!";
    }
}

I get Message: GearmanClient::setCompleteCallback(): function workerCompleted is not callable

The setCompleteCallback method expects a function name in quotations, but how do I call a class method? $this->"workerCompleted" obviously is wrong.

Answer 1

$this->gearman->client->setCompleteCallback("workerCompleted");

should be

$this->gearman->client->setCompleteCallback( array( $this, "workerCompleted"));

Because you’re specifying a callback to a member function, which requires an array of the object (or classname) that needs to be called, along with the name of the function. More info at the docs.