What are the techniques for multi-threaded concurrent programming in PHP7.0?

With the popularity of the Internet, PHP has become an increasingly popular programming language, and PHP is constantly being updated and improved. Its latest version, PHP7.0, also brings many new features and improvements. The biggest feature is its performance improvement, one of which is the added support for multi-threaded programming. Therefore, in this article, we will introduce the techniques to implement multi-threaded concurrent programming in PHP7.0.

1. Using thread pool

Thread pool is a relatively common multi-thread programming technology. It creates a certain number of threads in advance and manages and manages these threads. Reuse, thus reducing the cost of thread creation and destruction, and improving the efficiency and performance of multi-thread programming. In PHP7.0, the thread pool function can be implemented by using the pcntl extension library, and the extension library provides many related functions and interfaces, making the implementation of the thread pool simpler and more convenient.

2. Using coroutines

Coroutines are a lightweight concurrent programming technology. They are lighter than threads and can better utilize CPU resources. And it can avoid some common concurrent programming problems, such as deadlock, race conditions, resource competition, etc. In PHP7.0, the function of coroutine can be realized by using the Coroutine extension library, and the extension library provides many powerful features, such as coroutine scheduler, asynchronous IO, coroutine group, etc., making the implementation of coroutine Becoming simpler and more flexible.

3. Avoid separation/shared memory

In multi-threaded programming, shared memory is a very prone place for problems, such as data race conditions, deadlocks, data Inconsistency etc. Therefore, when writing multi-threaded programs in PHP7.0, you should try to avoid using shared memory and instead use message queues or network communication for inter-process communication to avoid these problems.

4. Use synchronous/asynchronous mechanism

In multi-thread programming, synchronous and asynchronous mechanisms have their own advantages and disadvantages. In specific programming implementation, they should be based on the specific requirements. situation to choose. For example, when a large number of requests need to be processed, the use of asynchronous mechanisms can improve the efficiency and performance of the program; and when thread safety needs to be ensured, the use of synchronization mechanisms can avoid problems such as data competition. In PHP7.0, you can implement synchronization and asynchronous mechanisms by using the swoole extension library, and the extension library provides a variety of functions and interfaces, making the implementation of synchronization and asynchronous more convenient and flexible.

5. Optimize code structure and algorithm

Finally, in order to achieve efficient multi-threaded concurrent programming in PHP7.0, the code structure and algorithm also need to be optimized. For example, reasonable task allocation, trying to avoid blocking, reducing memory and CPU usage, etc. These optimizations can improve the performance and stability of your program to better meet your needs.

Overall, implementing multi-threaded concurrent programming in PHP7.0 is a very challenging and valuable task. Although a variety of technologies and issues will be involved in the implementation process, as long as you follow some basic rules and techniques, you can easily handle these issues and achieve efficient multi-threaded concurrent programming.

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