如何在PHP应用程序中使用多线程

可以在PHP中进行多线程
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，执行并与线程，辅助对象和线程对象同步。

警告：pthreads扩展名不能在Web服务器环境中使用。因此，PHP中的线程应仅保留给基于CLI的应用程序使用。

简单测试

#!/usr/bin/php<?phpclass 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 Threadforeach ( range("A", "D") as $i ) {    $stack[] = new AsyncOperation($i);}// Start The Threadsforeach ( $stack as $t ) {    $t->start();}?>

第一次运行

12:00:06pm:     A  -start -sleeps 512:00:06pm:     B  -start -sleeps 312:00:06pm:     C  -start -sleeps 1012:00:06pm:     D  -start -sleeps 212:00:08pm:     D  -finish12:00:09pm:     B  -finish12:00:11pm:     A  -finish12:00:16pm:     C  -finish

第二次跑

12:01:36pm:     A  -start -sleeps 612:01:36pm:     B  -start -sleeps 112:01:36pm:     C  -start -sleeps 212:01:36pm:     D  -start -sleeps 112:01:37pm:     B  -finish12:01:37pm:     D  -finish12:01:38pm:     C  -finish12:01:42pm:     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)) {  $this->data = file_get_contents($url);        } else printf("Thread #%lu was not provided a URLn", $this->getThreadId());    }}$t = microtime(true);$g = new AsyncWebRequest(sprintf("http://www.google.com/?q=%s", rand() * 10));if ($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 bytesn", microtime(true) - $t, strlen($g->data));    } else        printf(" and %f seconds to finish, request failedn", microtime(true) - $t);}