我有一个线程类，它使用pthread PHP扩展：
class Task extends Thread
{
protected $arr = array();
public function run()
{
$this->arr[] = 1;
$this->arr[] = 2;
$this->arr[] = 3;
var_dump($this->arr);
}
}
$thread = new Task();
$thread->start();
$thread->join();
输出莫名其妙地显示了一个空数组。有人能简要解释一下原因吗？
我有一个解决方案，但没有一个可靠的解释，所以欢迎更多的答案。
这是我的Threaded孩子（为了简洁起见，对其进行了修剪）：
class ObjectConstructorThreaded extends Threaded
{
protected $worker;
protected $className;
protected $parameters;
protected $objectKey;
public function __construct($className, $parameters)
{
$this->className = $className;
$this->parameters = $parameters;
}
public function setWorker('Worker $worker)
{
$this->worker = $worker;
}
protected function getWorker()
{
return $this->worker;
}
public function run()
{
$reflection = new 'ReflectionClass($this->className);
$instance = $reflection->newInstanceArgs($this->parameters);
$this->objectKey = $this->getWorker()->notifyObject($instance);
}
public function getObjectKey()
{
return $this->objectKey;
}
}
和Worker（再次修剪）：
class ObjectServer extends Worker
{
protected $count = 0;
protected $objects = array();
public function notifyObject($object)
{
$key = $this->generateHandle();
/*
// Weird, this does not add anything to the stack
$this->objects[$key] = $object;
// Try pushing - fail!
$this->objects[] = $object;
// This works fine? (but not very useful)
$this->objects = array($key => $object);
*/
// Try adding - also fine!
$this->objects = $this->objects + array($key => $object);
return $key;
}
}
最后，启动线程：
$thread = new ObjectServer();
$thread->start();
$threaded = new ObjectConstructorThreaded($className, $parameters);
$threaded->setWorker($this->worker);
$thread->stack($threaded);
从我当时写的纯注释中可以看出，插入或推送到数组的尝试失败了，但重写它（通过将其设置为固定值或将旧值和新项合并）似乎有效。
因此，我将线程化视为使非平凡类型（数组和对象）有效地不可变，并且它们只能重置而不能修改。我对可序列化类也有同样的经历。
至于为什么会出现这种情况，或者如果有更好的方法，如果我发现了，我会更新这个答案！