PHP-无法从线程访问全局变量? [英] php - can't access global variables from Thread?

问题描述

我想这是一个特定的问题，但是由于某种原因，当我创建这样的线程时:

I suppose this is a specific question, but for some reason, when I create a Thread like this:

require_once(__DIR__.'/myotherfile.php');
class StreamBufferInput extends Thread {
    public function run(){
            global $max_buffer_size;
            global $data_source;    
            echo "DATA:" . $max_buffer_size;
            ...
    }
}

myotherfile.php中声明了这两个变量(可以从其他类中访问它们，但是我的echo语句在这里显示了DATA:，什么也没有.在类中执行全局变量方面我找不到很多东西，但是我在其他一个类的函数中有一个这样的全局声明，它可以正常工作.

myotherfile.php has those two variables declared in it (and they can be accessed from other classes, but my echo statement here prints DATA: and nothing else. I couldn't find much on doing global variables within classes, but I have a global declaration like this in a function of one of my other classes, and it works fine.

这是我启动线程的方式.

Here is how I'm starting the Thread.

$stream = new StreamBufferInput();
$stream->start();

推荐答案

目前在PHP中这是不可能的.您不能从线程本身内部访问在线程外部定义的全局范围变量.但是，您可以使用Thread::globally在全局范围内的线程内从全局范围内执行可调用对象，我相信这可以帮助您实现所需的目标.

This is not possible in PHP at the moment. You cannot access global scope variables defined outside a thread from within the thread itself. However, you can execute a callable from within the thread, in the global scope by using Thread::globally, I believe this could help you achieve what you want.

您可以在此处

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