Table of Contents
回复讨论(解决方案)
Home Backend Development PHP Tutorial 求php socket长连接多个来回通信的例子或教程

求php socket长连接多个来回通信的例子或教程

Jun 23, 2016 pm 01:37 PM

网上找到的例子的大概是这样的处理流程的:
socket_create //连接
socket_bind //绑定
socket_listen //监听

do {
if (收到socket_accept连接)
{
socket_read //读取接收到的信息
socket_write //传回回应信息
}
socket_close //关闭连接
} while(true);

监听之后,就等待请求,如果接收到请求之后就会读取传来的信息然后回应,回应之后就关闭连接。
(上面这些我从例子代码上理解出来的处理流程,可能我也有理解错的地方)
用这个例子试验之后发现问题是:这个例子,好像不能让客户端保持长连接,因为他 “如果接收到请求之后就会读取传来的信息然后回应,回应之后就关闭连接”

希望有大侠指点一下php socket长连接多个来回通信的实现流程,或给个教程或给个例子


回复讨论(解决方案)

你不在循环内 socket_close //关闭连接 不就行了?

试过不在循环内 socket_close //关闭连接,但还是接收不到客户端发来的第二次信息,相关代码:

do {	if (($msgsock = socket_accept($sock)) === false)	{//得到一个链接		echo "套接字接收失败,原因:".socket_strerror(socket_last_error($sock)) . "\n";		break;	}	echo '阅读客户端消息\n';	$buf = strlen(socket_read($msgsock, 8192));	$talkback = "客户端说:$buf\n";	$talkback = "服务器端说:好啊\n";	flush();	if (false === socket_write($msgsock, $talkback, strlen($talkback))) {		echo "套接字写失败,原因:" . socket_strerror(socket_last_error($sock)) ."\n";	} else {		echo '发送成功';	}	//socket_close($msgsock);	//flush();} while(true);
Copy after login

php socket 服务器何必自己写呢,用 workerman socket 服务器框架啊,长链接还是短链接一个配置字段的事儿,稳定,性能又高,最主要是简单

if (($msgsock = socket_accept($sock)) === false){	echo "套接字接收失败,原因:".socket_strerror(socket_last_error($sock)) . "\n";	break;}do {	echo '阅读客户端消息\n';	$buf = strlen(socket_read($msgsock, 8192));	$talkback = "客户端说:$buf\n";	$talkback = "服务器端说:好啊\n";	flush();	if (false === socket_write($msgsock, $talkback, strlen($talkback))) {		echo "套接字写失败,原因:" . socket_strerror(socket_last_error($sock)) ."\n";	} else {		echo '发送成功';	}	//socket_close($msgsock);	//flush();} while(true);
Copy after login

可以再发出一个请求后立即再发一个

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,

What are Enumerations (Enums) in PHP 8.1? What are Enumerations (Enums) in PHP 8.1? Apr 03, 2025 am 12:05 AM

The enumeration function in PHP8.1 enhances the clarity and type safety of the code by defining named constants. 1) Enumerations can be integers, strings or objects, improving code readability and type safety. 2) Enumeration is based on class and supports object-oriented features such as traversal and reflection. 3) Enumeration can be used for comparison and assignment to ensure type safety. 4) Enumeration supports adding methods to implement complex logic. 5) Strict type checking and error handling can avoid common errors. 6) Enumeration reduces magic value and improves maintainability, but pay attention to performance optimization.

How does session hijacking work and how can you mitigate it in PHP? How does session hijacking work and how can you mitigate it in PHP? Apr 06, 2025 am 12:02 AM

Session hijacking can be achieved through the following steps: 1. Obtain the session ID, 2. Use the session ID, 3. Keep the session active. The methods to prevent session hijacking in PHP include: 1. Use the session_regenerate_id() function to regenerate the session ID, 2. Store session data through the database, 3. Ensure that all session data is transmitted through HTTPS.

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.

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.

What is REST API design principles? What is REST API design principles? Apr 04, 2025 am 12:01 AM

RESTAPI design principles include resource definition, URI design, HTTP method usage, status code usage, version control, and HATEOAS. 1. Resources should be represented by nouns and maintained at a hierarchy. 2. HTTP methods should conform to their semantics, such as GET is used to obtain resources. 3. The status code should be used correctly, such as 404 means that the resource does not exist. 4. Version control can be implemented through URI or header. 5. HATEOAS boots client operations through links in response.

How do you handle exceptions effectively in PHP (try, catch, finally, throw)? How do you handle exceptions effectively in PHP (try, catch, finally, throw)? Apr 05, 2025 am 12:03 AM

In PHP, exception handling is achieved through the try, catch, finally, and throw keywords. 1) The try block surrounds the code that may throw exceptions; 2) The catch block handles exceptions; 3) Finally block ensures that the code is always executed; 4) throw is used to manually throw exceptions. These mechanisms help improve the robustness and maintainability of your code.

What are anonymous classes in PHP and when might you use them? What are anonymous classes in PHP and when might you use them? Apr 04, 2025 am 12:02 AM

The main function of anonymous classes in PHP is to create one-time objects. 1. Anonymous classes allow classes without names to be directly defined in the code, which is suitable for temporary requirements. 2. They can inherit classes or implement interfaces to increase flexibility. 3. Pay attention to performance and code readability when using it, and avoid repeatedly defining the same anonymous classes.

See all articles