最新下载
热门教程
- 1
- 2
- 3
- 4
- 5
- 6
- 7
- 8
- 9
- 10
php多线程抓取信息测试例子
时间:2022-06-24 17:59:23 编辑:袖梨 来源:一聚教程网
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 | 复制代码 |
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"; $t = microtime(true); foreach ($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 | 复制代码 |
$urls = array( $save_to='/test.txt'; // 把抓取的代码写入该文件 $mh = curl_multi_init(); do { foreach ($urls as $i => $url) { foreach ($urls as $i => $url) { curl_multi_close($mh); |
相关文章
- 《燕云十六声》红尘无眼完成图文攻略 12-25
- 《燕云十六声》阴阳如影完成图文攻略 12-25
- 《燕云十六声》悬檐之下四架椽屋图文攻略 12-25
- 《燕云十六声》2024最新公测时间介绍 12-25
- 《燕云十六声》有没有藏宝阁 12-25
- 《燕云十六声》制作公司介绍 12-25