for($i = 0; $i < 10; $i++)
{
$iPid = pcntl_fork();
if($iPid == -1)
{
?die(‘can\‘t be forked.‘);
}
if($iPid)
{
?# 主进程逻辑
?echo $i."\r\n";
?// exit();
}
else
?{
?# 子进程逻辑
?$iPid = posix_getpid(); # 获取子进程的ID
?$rlt=system(‘/usr/bin/php -f /home/wwwroot/seo/test_shell.php &‘.$i);
// print_r($rlt);
?exit();
}
}
exit();
pclose(popen("/home/xinchen/backend.php &", ‘r‘)); // 多线程
pclose(popen("/usr/local/php/bin/php /htdocs/www/site/task.php &", "r"));
//curl_multi实现多线程爬虫的示例
$mh = curl_multi_init(); //返回一个新cURL批处理句柄
?for ($i = ; $i < $max_size; $i++)
?{
???$ch = curl_init(); //初始化单个cURL会话
???curl_setopt($ch, CURLOPT_HEADER, );
???curl_setopt($ch, CURLOPT_URL, ‘http://www.zhihu.com/people/‘ . $user_list[$i] . ‘/about‘);
???curl_setopt($ch, CURLOPT_COOKIE, self::$user_cookie);
???curl_setopt($ch, CURLOPT_USERAGENT, ‘Mozilla/. (Windows NT .; WOW) AppleWebKit/. (KHTML, like Gecko) Chrome/... Safari/.‘);
???curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
???curl_setopt($ch, CURLOPT_FOLLOWLOCATION, );
???$requestMap[$i] = $ch;
???curl_multi_add_handle($mh, $ch); //向curl批处理会话中添加单独的curl句柄
?}
?$user_arr = array();
?do {
?????????//运行当前 cURL 句柄的子连接
???while (($cme = curl_multi_exec($mh, $active)) == CURLM_CALL_MULTI_PERFORM);
???if ($cme != CURLM_OK) {break;}
?????????//获取当前解析的cURL的相关传输信息
???while ($done = curl_multi_info_read($mh))
???{
?????$info = curl_getinfo($done[‘handle‘]);
?????$tmp_result = curl_multi_getcontent($done[‘handle‘]);
?????$error = curl_error($done[‘handle‘]);
?????$user_arr[] = array_values(getUserInfo($tmp_result));
?????//保证同时有$max_size个请求在处理
?????if ($i < sizeof($user_list) && isset($user_list[$i]) && $i < count($user_list))
?????{
???????$ch = curl_init();
???????curl_setopt($ch, CURLOPT_HEADER, );
???????curl_setopt($ch, CURLOPT_URL, ‘http://www.zhihu.com/people/‘ . $user_list[$i] . ‘/about‘);
???????curl_setopt($ch, CURLOPT_COOKIE, self::$user_cookie);
???????curl_setopt($ch, CURLOPT_USERAGENT, ‘Mozilla/. (Windows NT .; WOW) AppleWebKit/. (KHTML, like Gecko) Chrome/... Safari/.‘);
???????curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
???????curl_setopt($ch, CURLOPT_FOLLOWLOCATION, );
???????$requestMap[$i] = $ch;
???????curl_multi_add_handle($mh, $ch);
???????$i++;
?????}
?????curl_multi_remove_handle($mh, $done[‘handle‘]);
???}
???if ($active)
?????curl_multi_select($mh, );
?} while ($active);
?curl_multi_close($mh);
?return $user_arr;
php 多进程,测试中
原文地址：http://www.cnblogs.com/microtiger/p/7677674.html