PHP擴充之多線程

本篇文章主要介紹PHP多線程，感興趣的朋友參考下，希望對大家有所協助。

PHP 5.3 以上版本，使用pthreads PHP擴充，可以使PHP真正地支援多線程。
多線程在處理重複性的迴圈任務，能夠大大縮短程式執行時間。
PHP擴充下載：https://github.com/krakjoe/pthreads
PHP手冊文檔：http://php.net/manual/zh/book.pthreads.php
1、擴充的編譯安裝(Linux），編輯參數 –enable-maintainer-zts 是必選項：

'./configure''--prefix=/usr/local/webserver/php''--with-config-file-path=/usr/local/webserver/php/etc''--with-apxs2=/usr/local/webserver/httpd/bin/apxs''--with-libxml-dir=/usr/local/webserver/libxml2''--with-mysql=/usr/local/webserver/mysql''--with-mysqli=/usr/local/webserver/mysql/bin/mysql_config''--enable-soap' '--enable-sockets' '--with-curl' --enable-maintainer-ztsmake cleanmakemake installunzip pthreads-master.zipcd pthreads-master/usr/local/webserver/php/bin/phpize./configure --with-php-config=/usr/local/webserver/php/bin/php-config

makemake install

vi /usr/local/webserver/php/etc/php.ini

添加

extension = "pthreads.so"

2、給出一段PHP多線程、與For迴圈，抓取百度搜尋網頁面的PHP程式碼範例：

<?phpclass test_thread_run extends Thread{    public $url;    public $data;    public function __construct($url)    {        $this->url = $url;    }    public function run()    {        if(($url = $this->url))        {        $this->data = model_http_curl_get($url);        }    }}

<?phpfunction model_thread_result_get($urls_array){    foreach ($urls_array as $key => $value)    {        $thread_array[$key] = new test_thread_run($value["url"]);                         $thread_array[$key]->start();    }        foreach ($thread_array as $thread_array_key => $thread_array_value)    {            while($thread_array[$thread_array_key]->isRunning())        {        usleep(10);        }                if($thread_array[$thread_array_key]->join())        {                    $variable_data[$thread_array_key] = $thread_array[$thread_array_key]->data;        }    }        return $variable_data;}function model_http_curl_get($url,$userAgent=""){    $userAgent = $userAgent ? $userAgent : 'Mozilla/4.0 (compatible; MSIE 7.0; Windows NT 5.2)';    $curl = curl_init();    curl_setopt($curl, CURLOPT_URL, $url);    curl_setopt($curl, CURLOPT_RETURNTRANSFER, 1);    curl_setopt($curl, CURLOPT_TIMEOUT, 5);    curl_setopt($curl, CURLOPT_USERAGENT, $userAgent);        $result = curl_exec($curl);    curl_close($curl);    return $result;}for ($i=0; $i < 100; $i++){            $urls_array[] = array("name" => "baidu", "url" =>            "http://www.baidu.com/s?wd=".mt_rand(10000,20000));    }    $t = microtime(true);        $result = model_thread_result_get($urls_array);        $e = microtime(true);        echo "多線程：".($e-$t)."\n";        $t = microtime(true);        foreach ($urls_array as $key => $value)    {        $result_new[$key] = model_http_curl_get($value["url"]);}$e = microtime(true);echo "For迴圈：".($e-$t)."\n";?>