With the rapid development of the Internet, more and more applications adopt the Web architecture, and PHP, as a scripting language widely used in Web development, has also received increasing attention and application. With the continuous development and expansion of business, performance problems of PHP web applications have gradually been exposed. How to perform performance tuning has become an important challenge that PHP web developers have to face. Next, this article will introduce performance tuning techniques in PHP back-end API development to help PHP developers better optimize application performance.

1. Reduce the number of file inclusions

File inclusion is one of the essential processes in web development, but too many file inclusions will lead to a decrease in application performance. Because file inclusion requires operations such as file search, reading, and parsing, these operations consume a large amount of CPU and IO resources. Therefore, when performing file inclusion, it is recommended to minimize the number of inclusions, put related code into the same file, or minimize the number of file inclusions through automatic class loading, thereby improving application performance.

2. Caching query results

The most common operation in PHP web applications is to query the database, and the process of querying the database is often the bottleneck of application performance. In order to improve query performance, it is recommended to cache query results to avoid repeated queries. Commonly used caching methods include file caching, Memcached caching, Redis caching, etc., but different caching methods are suitable for different scenarios. For example, for scenarios that require high read and write performance, Memcached and Redis cache are the first choices, while for scenarios that require high stability and reliability, file cache is a better choice.

3. Use effective caching strategies

In addition to choosing the correct caching method, caching strategies are also an important factor affecting cache performance. Caching policies include expiration time, cache clearing method, cache updating method, etc. For the setting of cache expiration time, it is recommended to set it flexibly according to the business scenario. For the cache clearing method and cache updating method, you can choose front-end clearing, back-end clearing, scheduled clearing, subscription and publishing according to the actual situation to ensure the validity and consistency of the cache.

4. Use global variables and constants as little as possible

Although the use of global variables and constants can facilitate data sharing, due to their large scope, it can easily affect the performance of the application. Global variables and constants need to be referenced in every function and class, which increases the number of function calls and memory overhead. Therefore, it is recommended to use global variables and constants as little as possible during the development process, and use class member variables or static variables to achieve data sharing.

5. Use appropriate PHP extensions and certificates

PHP provides many extensions and certificates that can help developers speed up application development and optimization. Commonly used PHP extensions include MySQLi extension, PDO extension, OPcache extension, etc., which can effectively reduce application development time and running time. Choosing the right PHP certificate can also quickly improve the performance of your application. For example, certificates such as Zend Optimizer, eAccelerator, and XCache can effectively speed up the interpretation and execution of PHP applications.

6. Front-end performance tuning

Optimizing front-end performance can also have a great impact on the performance of PHP back-end API. The response speed and load capacity of the application can be improved by optimizing front-end JavaScript, HTML, CSS and other codes, reducing the number of HTTP requests, compressing static files, and enabling CDN. For example, using a CDN can effectively speed up the loading of static files such as JavaScript and CSS, thereby improving page rendering speed and user experience.

7. Check logs regularly and optimize

During the running process, PHP applications will generate a large amount of log information, including error information, exception information, debugging information, etc. These log information can help developers find problems in applications and optimize performance. Therefore, it is recommended to regularly check the log information of PHP applications and make adjustments and improvements based on the log information.

In short, performance tuning is an important issue that PHP developers must face. By choosing appropriate caching methods, caching strategies, avoiding too many file inclusions, using valid PHP extensions and certificates, narrowing the scope of global variables and constants, and optimizing front-end performance, you can effectively improve the performance of PHP applications. performance to meet user needs. At the same time, regularly checking the log information of the application and making adjustments and improvements are also important means to ensure the efficient and stable operation of the application.

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