没有调用类中的php回调函数

Question

给定这一行代码来回调函数和回调函数本身:

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

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

我明白了 Message: GearmanClient::setCompleteCallback(): function workerCompleted is not callable

该setCompleteCallback方法需要引号中的函数名称,但如何调用类方法？$this->"workerCompleted"显然是错的.

Answer 1

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

应该

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

因为您要指定对成员函数的回调,这需要一个需要调用的对象(或类名)的数组以及函数的名称.更多信息在文档.