php多线程的使用,首先需要PHP5.3以上版本,并安装pthreads PHP扩展,可以使PHP真正的支持多线程,扩展如何安装请自行百度.
PHP扩展下载:https://github.com/krakjoe/pthreads
PHP手册文档:http://php.net/manual/zh/book.pthreads.php
在安装好扩展之后,就可以运用多线程了,下面贴个通过搜索结果抓取百度网盘内容的代码:
- <?php
 - include 'include/CurlLoad.class.php'; // 引入读取库
 - /**
 - * 多线程抓取内容
 - * @param array $url 待抓取URL列表集合
 - * @return 成功返回指定内容,失败返回NULL
 - */
 - function vget($url) {
 - $ret = BaiduSRLinksGet ( $url, 1 ); // 获取结果列表地址
 - if ($ret != null) {
 - if (array_key_exists ( "links", $ret )) {
 - $infos = array ();
 - $number = count ( $ret ['links'] );
 - for($i = 0; $i < $number; $i ++) {//循环创建线程对象
 - $thread_array [$i] = new baidu_thread_run ( $ret ['links'] [$i] );
 - $thread_array [$i]->start ();
 - }
 - foreach ( $thread_array as $thread_array_key => $thread_array_value ) {//检查线程是否执行结束
 - while ( $thread_array [$thread_array_key]->isRunning () ) {
 - usleep ( 10 );
 - }
 - if ($thread_array [$thread_array_key]->join ()) {//如果执行结束,取出结果
 - $temp = $thread_array [$thread_array_key]->data;
 - if ($temp != null)
 - $infos ['res'] [] = $temp;
 - }
 - }
 - $infos ['pages'] = $ret ['pages'];
 - $infos ['status'] = "1";
 - } else
 - $infos = null;
 - } else
 - $infos = null;
 - return $infos;
 - }
 - /**
 - * 获取百度搜索结果列表URL
 - *
 - * @param string $url
 - * 搜索结果页URL
 - * @param int $format
 - * 默认$format=0,获取默认地址;$format=1获取跳转后真实地址
 - * @return NULL multitype:array()
 - */
 - function BaiduSRLinksGet($url, $format = 0) {
 - $html = CurlLoad::HtmlGet ( $url ); // 获取页面
 - if ($html == null)
 - return null;
 - try {
 - preg_match_all ( "/"url":"(?<links>.*)"}/", $html, $rets ); // 搜索结果链接筛选
 - if (! array_key_exists ( 'links', $rets )) // 如果数组中不包含Links键名,表示获取失败
 - return null;
 - $ret = array ();
 - if ($format == 1) {
 - $number = count ( $rets ['links'] );
 - for($i = 0; $i < $number; $i ++) {
 - $headr_temp = CurlLoad::Get_Headers ( $rets ['links'] [$i], 1 ); // 通过headr获取真实地址
 - if (array_key_exists ( "Location", $headr_temp ))
 - $ret ['links'] [$i] = $headr_temp ['Location'];
 - else
 - $ret ['links'] = $rets ['links'];
 - }
 - } else
 - $ret ['links'] = $rets ['links'];
 - preg_match_all ( '/href="?/s?wd=site%3Apan.baidu.com%20(?<url>.+?)&ie=utf-8">/', $html, $out );
 - unset ( $out ['url'] [0] );
 - $number = count ( $out ['url'] );
 - for($i = 1; $i < $number; $i ++) {
 - preg_match_all ( '/&pn=(.*)/', $out ['url'] [$i], $temp );
 - $ret ['pages'] [$temp [1] [0] / 10] = base64_encode ( $out ['url'] [$i] );
 - }
 - return $ret;
 - } catch ( Exception $e ) {
 - WriteLog ( $e );
 - return null;
 - }
 - }
 - /**
 - * 百度网盘资源信息获取
 - *
 - * @param string $url
 - * 网盘资源页URL
 - * @return NULL array
 - */
 - function PanInfoGet($url) {
 - $html = CurlLoad::HtmlGet ( $url ); // 获取页面
 - if ($html == null)
 - return null;
 - try {
 - if (preg_match_all ( "/文件名:(?<name>.*) 文件大小:(?<size>.*) 分享者:(?<user>.*) 分享时间:(?<date>.*) 下载次数:(?<number>[0-9]+)/", $html, $ret ) == 0)
 - return null;
 - $rets ['name'] = $ret ['name'] [0];
 - $rets ['size'] = $ret ['size'] [0];
 - $rets ['user'] = $ret ['user'] [0];
 - $rets ['date'] = $ret ['date'] [0];
 - $rets ['number'] = $ret ['number'] [0];
 - $rets ['link'] = $url;
 - return $rets;
 - } catch ( Exception $e ) {
 - WriteLog ( $e );
 - return null;
 - }
 - }
 - function WriteLog($str) {
 - $file = fopen ( "../error.log", "a+" );
 - fwrite ( $file, "Warning:" . date ( "Y/m/d H:i:s" ) . ":" . $str . "rn" );
 - fclose ( $file );
 - }
 - /**
 - * 多线程抓取对象
 - * @author MuXi
 - *
 - */
 - class baidu_thread_run extends Thread {
 - public $url;
 - public $data;
 - public function __construct($url) {
 - $this->url = $url;
 - }
 - public function run() {
 - if (($url = $this->url)) {
 - $this->data = PanInfoGet ( $url );//线程执行方法
 - }
 - }
 - }
 - ?>
 
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