PHP?? ?????? ???? ??

??

PHP?? ????? ??? ???? ?? ????, ??? ????? ??? ?? ?????? ???. ???? ?? ??? PHP ?? ??? ?? ????? ???? ?? ?? ????? ????? ???? ?? ???????.

? ??? PHP ??? ??? ??? ??? PHP ????? PHP?? ??? ? ?? ??? ??? ???? ?? ??? ????. ??? ?? ???? ??????? ?? ?? ???? ??? ? ????. ??? ?? ??? PHP?? ?????? ????? ????? ?????? ? ?? ??? ?? ????. ?? ????? ????

PHP??? ?????? ?????.

?, PHP??? ?????? pthread? ??? ? ????.

PHP ??? ???:

pthreads? PHP? ?????? ??? ?? ??? ???? ?? ?? API???. PHP ??????? ???, ??? ??? ? ??? ??? ??, ??, ??, ?? ? ???? ? ????.

??:
pthreads ??? ? ?? ???? ??? ? ????. ??? PHP? ?????? CLI ?? ???????? ????? ???.

?? ???

#!/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);
        }
    }
}

// 創(chuàng)建一個(gè)數(shù)組
$stack = array();

// 啟動(dòng)多線程
foreach ( range("A", "D") as $i ) {
    $stack[] = new AsyncOperation($i);
}

// 啟動(dòng)所有線程
foreach ( $stack as $t ) {
    $t->start();
}

?>

?? ??

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)) {
            /*
             * 如果請(qǐng)求大量數(shù)據(jù)，你可能想要使用 fsockopen 和 read，并在讀取之間使用 usleep
             */
            $this->data = file_get_contents($url);
        } else
            printf("Thread #%lu was not provided a URL\n", $this->getThreadId());
    }
}

$t = microtime(true);
$g = new AsyncWebRequest(sprintf("http://www.google.com/?q=%s", rand() * 10));
/* 開始同步 */
if ($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);
}

? ??? PHP?? ?????? ??? ??? ? ????? ?? ?????. ??? ??? PHP ??? ????? ?? ?? ??? ?????!