PHP多线程编程示例：创建并发任务学习机器

<?php
class MachineLearningTask extends Thread {
    public $data;
    public $result;
  
    public function __construct($data) {
        $this->data = $data;
    }
  
    public function run() {
        // 在这里执行机器学习任务的逻辑
        // 根据$data进行训练和预测，将结果保存到$result中
        // ...
    }
}
  
// 创建多个线程任务
$data1 = [1, 2, 3, 4, 5];
$data2 = [6, 7, 8, 9, 10];
$task1 = new MachineLearningTask($data1);
$task2 = new MachineLearningTask($data2);
 
// 启动多个线程
$task1->start();
$task2->start();
  
// 等待线程执行完毕
$task1->join();
$task2->join();
  
// 获取线程的结果
$result1 = $task1->result;
$result2 = $task2->result;
  
// 输出结果
echo "Result 1: " . $result1 . "
";
echo "Result 2: " . $result2 . "
";
?>

<?php
// 创建多个子进程任务
$processes = [];
$processes[] = pcntl_fork();
$processes[] = pcntl_fork();
  
if ($processes[0] == -1 || $processes[1] == -1) {
    // 创建失败
    exit("Failed to fork process!
");
} elseif ($processes[0] > 0 && $processes[1] > 0) {
    // 父进程
    // 等待子进程执行完毕
    pcntl_wait($status);
    pcntl_wait($status);
  
    // 输出结果
    echo "Parent process: Machine learning tasks finished!
";
} elseif ($processes[0] == 0 && $processes[1] > 0) {
    // 子进程1
    $data1 = [1, 2, 3, 4, 5];
    $result1 = machine_learning_task($data1);
  
    // 输出结果
    echo "Child process 1 result: " . $result1 . "
";
} elseif ($processes[0] > 0 && $processes[1] == 0) {
    // 子进程2
    $data2 = [6, 7, 8, 9, 10];
    $result2 = machine_learning_task($data2);
  
    // 输出结果
    echo "Child process 2 result: " . $result2 . "
";
}

function machine_learning_task($data) {
    // 执行机器学习任务的逻辑
    // 根据$data进行训练和预测，将结果返回
    // ...
}
?>