The disruptor of Node.js: Swoole extension for PHP_PHP Tutorial

Node.js has been very popular in the past two years, and asynchronous and coroutine are hot topics in network development. While pursuing new technologies, we should also reflect on the pitfalls involved. Node.js is indeed an interesting and unique language and technology, with dynamic features, fully asynchronous callback methods, closures and other features. Worth a try for all programmers. ​ But this article will introduce another programming language that is easily underestimated: PHP. PHP has long been used as a front-end scripting language for web development. PHP is extremely simple. You can master it in a week and develop a feature-rich website in a month. Since its development, PHP is no longer a simple language at all. PHP has a wide range of functions, including commonly used operating system functions, such as process management, signals, network communication, multi-threading, ptrace, inotify, encryption and decryption, and compression. Corresponding extensions are implemented, and PHP can call each other well with C/C++. PHP provides ZendAPI, which can easily use C to expand the functions of PHP. In terms of language features, PHP5.4 provides namespace, phar packaging, composer dependency management, traits, complete object-oriented programming syntax, powerful magic methods and constants, direct conversion of strings and function class objects, closures and anonymous functions, etc. Language features. In terms of back-end development, it is as powerful as Java and C#, but the development efficiency is higher.

Advantages of PHP over Node.js:

1. PHP development efficiency is higher

PHP is simpler and more direct than Node.js, which is a bit like C. Using PHP to develop a function is almost the most efficient among all languages. ​

2. More PHP programmers

Because PHP is easier to get started, the number of programmers far exceeds that of other languages. A large number of programmers in other languages ​​also know PHP. ​

3. There are many PHP open source projects

PHP has a large number of open source projects and various third-party libraries ​ One of the biggest features of Node.js is the built-in asynchronous high-performance Socket Server/Client implementation, and on this basis it provides a built-in Web server. There is a similar artifact in PHP, which is the Swoole extension. Using Swoole extension, you can develop a high-performance, safe and stable server program. It is not inferior to Node.js in any way, and in some aspects more powerful than Node.js. ​ Swoole is written in C language and runs as a PHP extension. Swoole's network IO part is based on the epoll/kqueue event loop and is fully asynchronous and non-blocking. The business logic part uses multi-process synchronous blocking mode to run. This ensures that the server can cope with high concurrency and a large number of TCP connections. It also ensures that business code can still be written simply. ​

Advantages of Swoole over Node.js:

1. Swoole natively supports multi-process/multi-threading

Developers only need to modify one parameter and configure how many processes to start. The Node.js network library itself does not provide multi-process/multi-thread implementation. Developers need to create the process themselves. Or simply use single threading. This does not take full advantage of multiple cores.

2. swoole uses message passing + multiple worker processes instead of multi-threading + shared memory + locking

, although the performance of shared memory is very good, there are security issues and need to be locked when reading and writing. Excessive lock granularity will result in only one thread running. If the lock is too complex, there will be deadlock problems. So developers need to be very careful.

3. The code writing of swoole is synchronous, rather than nested asynchronous callbacks

If the Node.js code is too complex, multiple layers of callbacks will be nested, making the code unreadable and the program flow becoming messy. Swoole uses the traditional semi-synchronous and semi-asynchronous multi-Worker implementation method under Linux. The business code is written in a synchronous manner, which is simpler. Swoole also has a built-in Socket client implementation, but it uses a synchronous + parallel method to execute. PHP itself also provides socket functions, but some functions have some bugs and are relatively complex. Swoole's built-in client classes are more secure and simplified.

4. swoole has built-in additional features that Node.js does not have

Such as CPU Affinity settings, daemonization, mixed UDP/TCP multi-port monitoring, multi-timers, etc.

Swoole project address:

https://github.com/matyhtf/swoole

http://www.bkjia.com/PHPjc/440159.htmlwww.bkjia.comtruehttp: //www.bkjia.com/PHPjc/440159.htmlTechArticleNode.js has been very popular in the past two years, and asynchronous and coroutine are hot topics in network development. While pursuing new technologies, we should also reflect on the pitfalls involved. Node.js is indeed an interesting subject...