Servers can be divided according to their functions: file server, database server, web server, mail server, proxy server...
All the above-mentioned servers can be developed using php. For example, for web servers, the commonly used framework is php Mysql Apache
File server (Recommended learning: PHP video tutorial)
File server (File server), also known as file server, refers to a computer network environment that is accessible to all users A file storage device is a special computer designed for other computers to retrieve and store files.
File servers usually have larger storage capacity than ordinary personal computers and have some other features, such as disk mirroring, multiple network interface cards, and hot redundant multiple power supplies.
File servers have evolved into high-performance systems with RAID storage subsystems and other high-availability features. File servers enhance storage capabilities and simplify network data management. On the one hand, it improves the performance of the system and increases the availability of data. On the other hand, it reduces the complexity of management and reduces operating expenses.
Database server
The database server is composed of one/multiple computers running in the local area network and database management system software. The database server provides data for customer applications. Serve.
The database server is built on the basis of the database system, has the characteristics of the database system, and has its own unique aspects. The main functions are as follows:
Database management functions, including system configuration and management, data access and update management, data integrity management and data security management.
Database query and manipulation functions, which include database retrieval and modification.
Database maintenance functions include data import/export management, database structure maintenance, data recovery functions and performance monitoring.
The database runs in parallel. Since there is more than one user accessing the database at the same time, the database server must support a parallel running mechanism to handle the simultaneous occurrence of multiple events.
web server
The Chinese name of Web Server is called web server or web server. WEB server is also called WWW (WORLD WIDE WEB) server. Its main function is to provide online information browsing services
web service
In layman's terms, Web server transmits (serves ) page allows the browser to browse, but the application server provides methods that the client application can call.
To be precise, you can say: Web servers specialize in processing HTTP requests, but application servers provide (serves) business logic to applications through many protocols.
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