ZMQPoll::poll

(PECL zmq >= 0.5.0)

ZMQPoll::poll — Poll the items

说明

public ZMQPoll::poll(array &$readable, array &$writable, int $timeout = -1): int

Polls the items in the current poll set. The readable and writable items are returned in the readable and writable parameters. ZMQPoll::getLastErrors() can be used to check if there were errors.

参数

readable: Array where readable ZMQSockets/PHP streams are returned. The array will be cleared at the beginning of the operation.
writable: Array where writable ZMQSockets/PHP streams are returned. The array will be cleared at the beginning of the operation.
timeout: Timeout for the operation. -1 means that poll waits until at least one item has activity. Please note that starting from version 1.0.0 the poll timeout is defined in milliseconds, rather than microseconds.

返回值

Returns an integer representing the amount of items with activity.

错误／异常

Throws ZMQPollException on error.

范例

示例 #1 A ZMQPoll() example

Create a simple poll server


<?php

/* Create socket, request-reply pattern (reply socket) */
$context = new ZMQContext();
$server  = $context->getSocket(ZMQ::SOCKET_REP);

/* Bind to port 5555 on 127.0.0.1 */
$server->bind("tcp://127.0.0.1:5555");

/* Create new pollset for incoming/outgoing message */
$poll = new ZMQPoll();

/* Add the object and listen for poll in/out */
$id = $poll->add($server, ZMQ::POLL_IN | ZMQ::POLL_OUT);
echo "Added object with id " . $id . "\n";

/* Initialise readable and writable arrays */
$readable = array();
$writable = array();

while (true) {
   /* Amount of events retrieved */
   $events = 0;

   try {
       /* Poll until there is something to do */
       $events = $poll->poll($readable, $writable, -1);
       $errors = $poll->getLastErrors();

       if (count($errors) > 0) {
           foreach ($errors as $error) {
               echo "Error polling object " . $error . "\n";
           }
       }
   } catch (ZMQPollException $e) {
       echo "poll failed: " . $e->getMessage() . "\n";
   }

   if ($events > 0) {
       /* Loop through readable objects and recv messages */
       foreach ($readable as $r) {
           try {
               echo "Received message: " . $r->recv() . "\n";
           } catch (ZMQException $e) {
               echo "recv failed: " . $e->getMessage() . "\n";
           }
       }

       /* Loop through writable and send back messages */
       foreach ($writable as $w) {
           try {
               $w->send("Got it!");
           } catch (ZMQException $e) {
               echo "send failed: " . $e->getMessage() . "\n";
           }
       }
   }
}
?>

add a note

User Contributed Notes

There are no user contributed notes for this page.

官方地址：https://www.php.net/manual/en/zmqpoll.poll.php

有任何技术问题请点击这里网站运营推广招聘

IT PHP 编程语言 Linux 科技开发编程 Elasticsearch HTML/CSS/XML 网络 JAVA NoSQL C/C++ 面试数据库 Golang Git 算法正则表达式操作系统 Redis 互联网 MySql JavaScript 运维软件架构设计 Mac OS 国际 TCP/IP Excel Vim Socket Windows Oracle VR MongoDB 运营 Python MemCache 商业硬件电子设计 nginx 娱乐摄影游戏 WordPress HTTP 团建数码电器

php7 安装fileinfo扩展 preg_split — 通过一个正则表达式分隔字符串 [PHP] inet_pton/inet_ntop IP地址转换函数 php位值,解决 PHP 中 usort 在值相同时改变原始位置的问题 PHPMailer设置utf8 PHPMailer字符集CharSet 如何在Composer中为GitLab实例设置访问令牌 array_multisort() 多字段排序 laravel框架查看sql语句方式 [原创]诡异的php-fpm超时问题利用php soap实现web service PHP获取指定函数定义在哪个文件中及行号 php设置cookie为httponly防止xss攻击 PHP-FPM进程数的设定 ADOConnection 公用函数 PHP7添加redis扩展 PHP5 扩展SOAP 调用 webservice PHPstorm 里面Terminal 不能使用 esc键吗退出编辑模式吗 Packagist / Composer 中国全量镜像利用PHP SOAP实现WEB SERVICE adodb手册

略微加速

PHP官方手册 - 互联网笔记

ZMQPoll::poll

说明

参数

返回值

错误／异常

范例

User Contributed Notes