php多线程抓取信息测试示例
发布时间：2022-02-11 07:15:15 所属栏目：PHP教程 来源：互联网
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真正地支持多线程。多线程在处理重复性的循环任务
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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); ?> （编辑：威海站长网） 【声明】本站内容均来自网络，其相关言论仅代表作者个人观点，不代表本站立场。若无意侵犯到您的权利，请及时与联系站长删除相关内容! |
