Home Backend Development PHP Tutorial 简单介绍PHP非阻塞模式_php实例

简单介绍PHP非阻塞模式_php实例

Jun 07, 2016 pm 05:09 PM

非阻塞模式是指利用socket事件的消息机制,Server端与Client端之间的通信处于异步状态。

让PHP不再阻塞当PHP作为后端处理需要完成一些长时间处理,为了快速响应页面请求,不作结果返回判断的情况下,可以有如下措施:

一、若你使用的是FastCGI模式,使用fastcgi_finish_request()能马上结束会话,但PHP线程继续在跑。

echo "program start.";
file_put_contents('log.txt','start-time:'.date('Y-m-d H:i:s'), FILE_APPEND);
fastcgi_finish_request();
sleep(1);
echo 'debug...';
file_put_contents('log.txt', 'start-proceed:'.date('Y-m-d H:i:s'), FILE_APPEND);
sleep(10);
file_put_contents('log.txt', 'end-time:'.date('Y-m-d H:i:s'), FILE_APPEND);
Copy after login

这个例子输出结果可看到输出program start.后会话就返回了,所以debug那个输出浏览器是接收不到的,而log.txt文件能完整接收到三个完成时间。

二、使用fsockopen、cUrl的非阻塞模式请求另外的网址

$fp = fsockopen("www.example.com", 80, $errno, $errstr, 30);
if (!$fp) die('error fsockopen');
stream_set_blocking($fp,0);
$http = "GET /save.php / HTTP/1.1\r\n"; 
$http .= "Host: www.example.com\r\n"; 
$http .= "Connection: Close\r\n\r\n";
fwrite($fp,$http);
fclose($fp);
Copy after login

利用cURL中的curl_multi_*函数发送异步请求

$cmh = curl_multi_init();
$ch1 = curl_init();
curl_setopt($ch1, CURLOPT_URL, "http://localhost:6666/child.php");
curl_multi_add_handle($cmh, $ch1);
curl_multi_exec($cmh, $active);
echo "End\n";
Copy after login

三、使用Gearman、Swoole扩展

Gearman是一个具有php扩展的分布式异步处理框架,能处理大批量异步任务;
Swoole最近很火,有很多异步方法,使用简单。(尘缘注:号称重新定义PHP,把NodeJS喷得体无完肤。Swoole工具虽好,却感觉是扩展本身跟NodeJS没可比性)

四、使用redis等缓存、队列,将数据写入缓存,使用后台计划任务实现数据异步处理。

这个方法在常见的大流量架构中应该很常见吧

五、极端的情况下,可以调用系统命令,可以将数据传给后台任务执行,个人感觉不是很高效。

$cmd = 'nohup php ./processd.php $someVar >/dev/null &';
`$cmd`
Copy after login

六、外国佬的大招,没看懂,php原生支持

http://nikic.github.io/2012/12/22/Cooperative-multitasking-using-coroutines-in-PHP.html

七、安装pcntl扩展,使用pcntl_fork生成子进程异步执行任务,个人觉得是最方便的,但也容易出现zombie process

if (($pid = pcntl_fork()) == 0) {
child_func(); //子进程函数,主进程运行
} else {
father_func(); //主进程函数
}
echo "Process " . getmypid() . " get to the end.\n";
function father_func() {
echo "Father pid is " . getmypid() . "\n";
}
function child_func() {
sleep(6);
echo "Child process exit pid is " . getmypid() . "\n";
exit(0);
}
Copy after login

以上内容是小编给大家介绍的PHP非阻塞模式,希望对大家有所帮助!

Statement of this Website
The content of this article is voluntarily contributed by netizens, and the copyright belongs to the original author. This site does not assume corresponding legal responsibility. If you find any content suspected of plagiarism or infringement, please contact admin@php.cn

Hot AI Tools

Undresser.AI Undress

Undresser.AI Undress

AI-powered app for creating realistic nude photos

AI Clothes Remover

AI Clothes Remover

Online AI tool for removing clothes from photos.

Undress AI Tool

Undress AI Tool

Undress images for free

Clothoff.io

Clothoff.io

AI clothes remover

Video Face Swap

Video Face Swap

Swap faces in any video effortlessly with our completely free AI face swap tool!

Hot Tools

Notepad++7.3.1

Notepad++7.3.1

Easy-to-use and free code editor

SublimeText3 Chinese version

SublimeText3 Chinese version

Chinese version, very easy to use

Zend Studio 13.0.1

Zend Studio 13.0.1

Powerful PHP integrated development environment

Dreamweaver CS6

Dreamweaver CS6

Visual web development tools

SublimeText3 Mac version

SublimeText3 Mac version

God-level code editing software (SublimeText3)

Explain JSON Web Tokens (JWT) and their use case in PHP APIs. Explain JSON Web Tokens (JWT) and their use case in PHP APIs. Apr 05, 2025 am 12:04 AM

JWT is an open standard based on JSON, used to securely transmit information between parties, mainly for identity authentication and information exchange. 1. JWT consists of three parts: Header, Payload and Signature. 2. The working principle of JWT includes three steps: generating JWT, verifying JWT and parsing Payload. 3. When using JWT for authentication in PHP, JWT can be generated and verified, and user role and permission information can be included in advanced usage. 4. Common errors include signature verification failure, token expiration, and payload oversized. Debugging skills include using debugging tools and logging. 5. Performance optimization and best practices include using appropriate signature algorithms, setting validity periods reasonably,

Describe the SOLID principles and how they apply to PHP development. Describe the SOLID principles and how they apply to PHP development. Apr 03, 2025 am 12:04 AM

The application of SOLID principle in PHP development includes: 1. Single responsibility principle (SRP): Each class is responsible for only one function. 2. Open and close principle (OCP): Changes are achieved through extension rather than modification. 3. Lisch's Substitution Principle (LSP): Subclasses can replace base classes without affecting program accuracy. 4. Interface isolation principle (ISP): Use fine-grained interfaces to avoid dependencies and unused methods. 5. Dependency inversion principle (DIP): High and low-level modules rely on abstraction and are implemented through dependency injection.

How to automatically set permissions of unixsocket after system restart? How to automatically set permissions of unixsocket after system restart? Mar 31, 2025 pm 11:54 PM

How to automatically set the permissions of unixsocket after the system restarts. Every time the system restarts, we need to execute the following command to modify the permissions of unixsocket: sudo...

How to debug CLI mode in PHPStorm? How to debug CLI mode in PHPStorm? Apr 01, 2025 pm 02:57 PM

How to debug CLI mode in PHPStorm? When developing with PHPStorm, sometimes we need to debug PHP in command line interface (CLI) mode...

Explain the concept of late static binding in PHP. Explain the concept of late static binding in PHP. Mar 21, 2025 pm 01:33 PM

Article discusses late static binding (LSB) in PHP, introduced in PHP 5.3, allowing runtime resolution of static method calls for more flexible inheritance.Main issue: LSB vs. traditional polymorphism; LSB's practical applications and potential perfo

How to send a POST request containing JSON data using PHP's cURL library? How to send a POST request containing JSON data using PHP's cURL library? Apr 01, 2025 pm 03:12 PM

Sending JSON data using PHP's cURL library In PHP development, it is often necessary to interact with external APIs. One of the common ways is to use cURL library to send POST�...

Explain late static binding in PHP (static::). Explain late static binding in PHP (static::). Apr 03, 2025 am 12:04 AM

Static binding (static::) implements late static binding (LSB) in PHP, allowing calling classes to be referenced in static contexts rather than defining classes. 1) The parsing process is performed at runtime, 2) Look up the call class in the inheritance relationship, 3) It may bring performance overhead.

See all articles