简介

This extension provides asyncronous POSIX I/O by means of » libeio C library written by Marc Lehmann.

注意: 此扩展在 Windows 平台上不可用。

警告

It is important to be aware that each request is executed in a thread, and the order of execution of continuously queued requests basically is unpredictable. For instance, the following piece of code is incorrect.

示例 #1 Incorrect requests


<?php
// Request to create symlink of $filename to $link
eio_symlink($filename, $link);

// Request to move $filename to $new_filename
eio_rename($filename, $new_filename);

// Process requests
eio_event_loop();
?>

In the example above eio_rename() request may finish before eio_symlink(). To fix it you might call eio_rename() in the callback of eio_symlink():

示例 #2 Calling request from a request callback


<?php
function my_symlink_done($filename, $result) {
 // Request to move $filename to $new_filename
 eio_rename($filename, "/path/to/new-name");

 // Process requests
 eio_event_loop();
}

// Request to create symlink of $filename to $link
eio_symlink($filename, $link, EIO_PRI_DEFAULT, "my_symlink_done", $filename);

// Process requests
eio_event_loop();
?>

Alternatively, you might want to create a request group:

示例 #3 Calling request from a request callback


<?php
/* Is called when the group requests are done */
function my_grp_done($data, $result) {
 // ...
}

function my_symlink_done($filename, $result) {
 // Create eio_rename request and add it to the group
 $req = eio_rename($filename, "/path/to/new-name");
 eio_grp_add($grp, $req);
 // You might want to add more requests...
}

// Create a request group
$grp = eio_grp("my_grp_done", "my_grp_data");

// Create eio_symlink request and add it to the group
// Pass $filename to the callback
$req = eio_symlink($filename, $link,
  EIO_PRI_DEFAULT, "my_symlink_done", $filename);
eio_grp_add($grp, $req);

// Process requests
eio_event_loop();
?>

Group is a special kind of request that could accumulate a set of regular eio requests. This could be used to create a complex request that opens, reads and closes a file.

Since version 0.3.0 alpha, a variable used in communications with libeio internally, could be retrieved with eio_get_event_stream(). The variable could be used to bind to an event loop supported by some other extension. You might organize a simple event loop where eio and libevent work together:

示例 #4 Using eio with libevent


<?php
function my_eio_poll($fd, $events, $arg) {
    /* Some libevent regulation might go here .. */
    if (eio_nreqs()) {
        eio_poll();
    }
    /* .. and here */
}

function my_res_cb($d, $r) {
    var_dump($r); var_dump($d);
}

$base = event_base_new();
$event = event_new();

// This stream is used to bind with libevent
$fd = eio_get_event_stream();

eio_nop(EIO_PRI_DEFAULT, "my_res_cb", "nop data");
eio_mkdir("/tmp/abc-eio-temp", 0750, EIO_PRI_DEFAULT, "my_res_cb", "mkdir data");
/* some other eio_* calls here ... */


// set event flags
event_set($event, $fd, EV_READ /*| EV_PERSIST*/, "my_eio_poll", array($event, $base));

// set event base 
event_base_set($event, $base);

// enable event
event_add($event);

// start event loop
event_base_loop($base);

/* The same will be available via buffered libevent interface */
?>

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/intro.eio.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 开发编程科技 Elasticsearch HTML/CSS/XML 网络面试数据库 JAVA NoSQL C/C++ Golang Git 算法操作系统正则表达式 Redis 互联网 MySql JavaScript 运维软件国际架构设计 Mac OS TCP/IP Excel Vim Windows Socket Oracle VR MongoDB Python 运营 MemCache 商业硬件电子娱乐设计 nginx 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位值,解决 PHP 中 usort 在值相同时改变原始位置的问题 [PHP] inet_pton/inet_ntop IP地址转换函数 [鸟哥]PHP_INT_MIN 和 -9223372036854775808 PHP 8.1 opcache预加载 Composer的Packagist资源 ADORecordSet对象 adodb手册 mysql面试题 PHP json解析（json_decode）页面工具 array_multisort() 多字段排序 php中几种注释规范 PHP5 扩展SOAP 调用 webservice php设置cookie为httponly防止xss攻击 Packagist / Composer 中国全量镜像两千行PHP学习笔记 PHP mkdir()写出来的权限与mode值不符合 composer遇到Your configuration does not allow connection to http://的问题怎么解决

略微加速

PHP官方手册 - 互联网笔记

简介

User Contributed Notes