PHP pthread未在多线程方法中运行

我的PHP Pthread代码：

<?php

$query="test";
$sits=array('demo1','demo3','demo2','demo3','demo4','demo5','demo6','demo7','demo8');

    class StackableArray extends Stackable { public function run() { } };

    class Storage extends Stackable { public function run() { } };


    $Storage = new Storage();

    class SiteProcess extends Thread
    {   
        private $Storage;
        private $site;

        public function __construct(Storage $Storage, $site,$query)
        {
            $this->Storage = $Storage;
            $this->site = $site;
            $this->query = $query;

        }

        public function run()
        {
            require_once("Sites/{$this->site}.php");        
            $siteObj = new $this->site;     
            $this->Storage[] = $siteObj->getPriceData( $this->query,$cache);                              
        }
    }

    foreach($sites as $site)
    {       echo "start time :".strftime('%c')."<br>";
        $Thread = new SiteProcess($Storage, $site,$query);      
        $Thread->start();  
        $Threads[$re] = $Thread;

    }

    foreach($Threads as $Thread)
    {
        $Thread->join();

    }


    ?>

PHP线程不是以多线程方式执行的。我认为代码不是以并行方式逐个执行的。我尝试使用Stackable类，但不工作

我看到的是正确的吗？还是我做错了什么？

我的核心PHP代码如下所示：

  $query="test";
  $sits=array('demo1','demo3','demo2','demo3','demo4','demo5','demo6','demo7','demo8');

  foreach($sites as $site)
    { 

    require_once 'Sites/'.$site.'.php';
    $siteObj = new $site;
    $data = $siteObj->getPriceData($query);

    }

---

$Threads[$re]

，$Threads的计数最大为1，这就是为什么它们一次运行一个线程…@JoeWatkins thnx用于回放..你能告诉我工作情况吗code@JoeWatkins如何为$Threads指定最大计数可能会有所帮助

  $query="test";
  $sits=array('demo1','demo3','demo2','demo3','demo4','demo5','demo6','demo7','demo8');

  foreach($sites as $site)
    { 

    require_once 'Sites/'.$site.'.php';
    $siteObj = new $site;
    $data = $siteObj->getPriceData($query);

    }