PHP7中对多线程编程的支持：如何利用多核处理器提高代码的并发性？

<?php
class MyThread extends Thread {
    public function run(){
        echo "Hello, I am a thread.
";
    }
}

$thread = new MyThread();
$thread->start();
$thread->join();
?>

<?php
class Counter extends Threaded {
    private $count;

    public function __construct(){
        $this->count = 0;
    }

    public function increment(){
        $this->synchronized(function(){
            $this->count++;
        });
    }

    public function getCount(){
        $this->synchronized(function(){
            echo "The count is: " . $this->count . "
";
        });
    }
}

$counter = new Counter();

for($i = 0; $i < 10; $i++){
    $thread = new class($counter) extends Thread {
        private $counter;

        public function __construct($counter){
            $this->counter = $counter;
        }

        public function run(){
            $this->counter->increment();
        }
    };

    $thread->start();
    $thread->join();
}

$counter->getCount();
?>