php多线程获取信息测试例子

发布时间：2023-07-29 10:09:31 所属栏目：PHP教程来源：

导读：只在php5.3以后的版本才真正的可以使用多线程序了,以前都是假的curl实现的多线程工作,下面我来给各位介绍几个多线程抓取信息测试例子,希望对各位会有帮助.

PHP 5.3 以上版本,使用pthreads PHP扩展,可以使PHP真正地

只在php5.3以后的版本才真正的可以使用多线程序了,以前都是假的curl实现的多线程工作,下面我来给各位介绍几个多线程抓取信息测试例子,希望对各位会有帮助.

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:

cd /Data/tgz/php-5.3.8
./configure --prefix=/Data/apps/php --with-config-file-path=/Data/apps/php/etc --with-mysql=/Data/apps/mysql --with-mysqli=/Data/apps/mysql/bin/mysql_config --with-iconv-dir --with-freetype-dir=/Data/apps/libs --with-jpeg-dir=/Data/apps/libs --with-png-dir=/Data/apps/libs --with-zlib --with-libxml-dir=/usr --enable-xml --disable-rpath --enable-bcmath --enable-shmop --enable-sysvsem --enable-inline-optimization --with-curl --enable-mbregex --enable-fpm --enable-mbstring --with-mcrypt=/Data/apps/libs --with-gd --enable-gd-native-ttf --with-openssl --with-mhash --enable-pcntl --enable-sockets --with-xmlrpc --enable-zip --enable-soap --enable-opcache --with-pdo-mysql --enable-maintainer-zts
make clean
make
make install

unzip pthreads-master.zip
cd pthreads-master
/Data/apps/php/bin/phpize
./configure --with-php-config=/Data/apps/php/bin/php-config
make
make install
添加扩展:

vi /Data/apps/php/etc/php.ini

extension = "pthreads.so"

一段PHP多线程、与For循环,抓取百度搜索页面的PHP代码示例,代码如下:

<?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);
}
}
}

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";
//开源代码Cuoxin.com
$t = microtime(true);
foreach ($urls_array as $key => $value)
{
$result_new[$key] = model_http_curl_get($value["url"]);
}
$e = microtime(true);
echo "For循环：".($e-$t)."n";
?>
例子,采集数据,代码如下:

<?php
$urls = array(
'http://www.111cn.net/',
'http://www.sohu.com/',
'http://www.163.com/'
);

$save_to='/test.txt'; // 把抓取的代码写入该文件
$st = fopen($save_to,"a");

$mh = curl_multi_init();
foreach ($urls as $i => $url) {
$conn[$i] = curl_init($url);
curl_setopt($conn[$i], CURLOPT_USERAGENT, "Mozilla/4.0 (compatible; MSIE 7.0; Windows NT 6.0)");
curl_setopt($conn[$i], CURLOPT_HEADER ,0);
curl_setopt($conn[$i], CURLOPT_CONNECTTIMEOUT,60);
curl_setopt($conn[$i],CURLOPT_RETURNTRANSFER,true); // 设置不将爬取代码写到浏览器，而是转化为字符串
curl_multi_add_handle ($mh,$conn[$i]);
}

do {
curl_multi_exec($mh,$active);
} while ($active);

foreach ($urls as $i => $url) {
$data = curl_multi_getcontent($conn[$i]); // 获得爬取的代码字符串
fwrite($st,$data); // 将字符串写入文件。当然，也可以不写入文件，比如存入数据库
} // 获得数据变量，并写入文件

foreach ($urls as $i => $url) {
curl_multi_remove_handle($mh,$conn[$i]);
curl_close($conn[$i]);
}

curl_multi_close($mh);
fclose($st);
?>

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