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php - 多线程 PHP

问题描述

我在PHP中遇到了多线程的问题，我想在调用函数FunctionAync时，它返回后，它仍然处理函数Process（目前它只在完成处理函数Process后才返回），我该怎么办？

<?php

namespace App\Http\Controllers\Helper;

use Illuminate\Http\Request;

use Spatie\Async\Pool;

class AsyncTask

{
    function functionAsync(Request $request){
        $pool = Pool::create();
        $pool->add(function () use ($request){

        $this->Process($request);

        })->then(function ($output) {
            return;
        })->catch(function (Throwable $exception) {
            return;
        });
        await($pool);
        return;
    }
    function Process($request){
        sleep(1000);
    }
}

标签： phplaravelmultithreading

解决方案

多线程在 php 中是可能的

是的，您可以使用pthreads在 PHP 中执行多线程

从PHP 文档：

pthreads 是一个面向对象的 API，它提供了 PHP 中多线程所需的所有工具。PHP 应用程序可以创建、读取、写入、执行和与线程、Worker 和线程对象同步。

警告：pthreads 扩展不能在 Web 服务器环境中使用。因此，PHP 中的线程应该只保留给基于 CLI 的应用程序。

简单测试

#!/usr/bin/php
<?php
class AsyncOperation extends Thread {

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

    public function run() {
        if ($this->arg) {
            $sleep = mt_rand(1, 10);
            printf('%s: %s  -start -sleeps %d' . "\n", date("g:i:sa"), $this->arg, $sleep);
            sleep($sleep);
            printf('%s: %s  -finish' . "\n", date("g:i:sa"), $this->arg);
        }
    }
}

// Create a array
$stack = array();

//Initiate Multiple Thread
foreach ( range("A", "D") as $i ) {
    $stack[] = new AsyncOperation($i);
}

// Start The Threads
foreach ( $stack as $t ) {
    $t->start();
}

?>

第一次运行

12:00:06pm:     A  -start -sleeps 5
12:00:06pm:     B  -start -sleeps 3
12:00:06pm:     C  -start -sleeps 10
12:00:06pm:     D  -start -sleeps 2
12:00:08pm:     D  -finish
12:00:09pm:     B  -finish
12:00:11pm:     A  -finish
12:00:16pm:     C  -finish

第二轮

12:01:36pm:     A  -start -sleeps 6
12:01:36pm:     B  -start -sleeps 1
12:01:36pm:     C  -start -sleeps 2
12:01:36pm:     D  -start -sleeps 1
12:01:37pm:     B  -finish
12:01:37pm:     D  -finish
12:01:38pm:     C  -finish
12:01:42pm:     A  -finish

现实世界的例子

error_reporting(E_ALL);
class AsyncWebRequest extends Thread {
    public $url;
    public $data;

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

    public function run() {
        if (($url = $this->url)) {
            /*
             * If a large amount of data is being requested, you might want to
             * fsockopen and read using usleep in between reads
             */
            $this->data = file_get_contents($url);
        } else
            printf("Thread #%lu was not provided a URL\n", $this->getThreadId());
    }
}

$t = microtime(true);
$g = new AsyncWebRequest(sprintf("http://www.google.com/?q=%s", rand() * 10));
/* starting synchronization */
if ($g->start()) {
    printf("Request took %f seconds to start ", microtime(true) - $t);
    while ( $g->isRunning() ) {
        echo ".";
        usleep(100);
    }
    if ($g->join()) {
        printf(" and %f seconds to finish receiving %d bytes\n", microtime(true) - $t, strlen($g->data));
    } else
        printf(" and %f seconds to finish, request failed\n", microtime(true) - $t);
}

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