A brief analysis of several modes of PHP from multiple angles

PHP is a server-side scripting language that can run on almost all web servers and operating systems. PHP occupies an important position in Internet applications and is an important component of many websites and web applications. PHP has multiple modes, each with its own characteristics and uses. This article will introduce several modes of PHP from various perspectives.

1. CGI mode

CGI (Common Gateway Interface, public gateway interface) mode is a mode that runs in process mode. Each request will start a new PHP process for processing Automatically exit after completing the request. Therefore, the advantage of CGI mode is that it is easy to control the use of process resources, CGI programs can be written in various languages, and the time limit is good. But the disadvantage is that each request needs to start a new process. For large websites, when the request volume is large, it may not be able to handle it.

2. Module mode

Module mode is a mode that is loaded and run as a module in the Web server. It can make good use of the function library of the Web server and cooperate more closely with the Web server. The advantages are high efficiency, always running, fast response, and suitable for handling multi-user requests. But the disadvantage is that it is inconvenient to control the use of process resources.

3. FastCGI

FastCGI is an improved version of CGI. Its main feature is to reduce the startup and exit of processes, and each process can handle multiple requests. FastCGI has very good operating efficiency, performs well when processing large websites, and is suitable for high-load web applications. The disadvantage is that the process manager of the FastCGI protocol needs to be installed on the server.

4. CLI

CLI stands for Command Line Interface, which refers to the mode in which PHP runs under the command line. The CLI mode can be easily used for script writing and management such as system management and scheduled tasks. PHP CLI can be run directly without a web server and browser, which is very convenient for some programs that need to be run under the command line.

5. Embedded mode

Embedded mode refers to the mode of embedding the PHP parser in other applications. Embedded mode enables applications to have the function of dynamic code execution, extending the functionality and flexibility of applications, and is very suitable for applications that require dynamically generated content. However, embedded mode requires a complex compilation process for the application and has security issues.

Summary:

PHP has a variety of modes to choose from, each mode has its own characteristics and applicable scenarios. When choosing the PHP running mode, you need to judge based on your own application scenarios and system resource requirements, and choose the mode that best suits you. At the same time, when using any mode of PHP, you also need to pay attention to security and the use of process resources to avoid system bottlenecks and security issues.

The above is the detailed content of A brief analysis of several modes of PHP from multiple angles. For more information, please follow other related articles on the PHP Chinese website!