PHP 多线程的使用，PHP多线程使用

PHP 多线程的使用，PHP多线程使用

PHP 5.3 以上版本，使用pthreads PHP扩展，可以使PHP真正地支持多线程。
多线程在处理重复性的循环任务，能够大大缩短程序执行时间。
PHP扩展下载：https://github.com/krakjoe/pthreads
PHP手册文档：http://php.net/manual/zh/book.pthreads.php
1、扩展的编译安装(Linux），编辑参数 –enable-maintainer-zts 是必选项：

'./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-zts
make clean
make
make install
unzip pthreads-master.zip
cd pthreads-master
/usr/local/webserver/php/bin/phpize
./configure --with-php-config=/usr/local/webserver/php/bin/php-config

make
make install

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

添加

extension = "pthreads.so"

2、给出一段PHP多线程、与For循环，抓取百度搜索页面的PHP代码示例：

<?php
class 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);
        }
    }
}

<?php

function 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);
    $e = microtime(true);
    echo "多线程：".($e-$t)."\n";
    $t = microtime(true);
    foreach ($urls_array as $key => $value)
    {
    $result_new[$key] = model_http_curl_get($value["url"]);
}
$e = microtime(true);
echo "For循环：".($e-$t)."\n";
?>