What are the PHP infrastructures?

php infrastructure has server environment, database support, file processing and security. Detailed introduction: 1. Server environment, including Apache, Nginx and IIS; 2. Database support, mainly including MySQL, PostgreSQL and SQLite; 3. File processing, including file upload, file operation and directory operation; 4. Security, Security features include input validation, access control, encryption, and hashing to protect applications from malicious attacks.

The operating environment of this tutorial: windows10 system, php8.1.3 version, DELL G3 computer.

PHP(Hypertext Preprocessor) is a widely used open source server-side scripting language with a powerful infrastructure that can be used to develop various types of web applications. This article will introduce the main components of PHP infrastructure, including server environment, database support, file handling and security.

1. Server environment:

PHP can run in a variety of different server environments, including Apache, Nginx and IIS. These servers provide support for PHP parsers and are tightly integrated with the PHP engine, allowing web servers to parse and execute PHP scripts.

1. Apache: Apache is an open source web server widely used for PHP development. By configuring the PHP module on the Apache server, PHP scripts can be embedded into HTML pages and parsed and executed when requested by the client browser.

2. Nginx: Nginx is another popular web server known for its high performance and low system resource consumption. Unlike Apache, Nginx does not directly support PHP, but can pass requests through the FastCGI protocol to an external PHP interpreter (such as PHP-FPM) for processing.

3. IIS: Internet Information Services (IIS) is Microsoft's Web server that provides PHP support that is tightly integrated with the Windows operating system. It is possible to run PHP scripts on Windows servers by installing IIS and a PHP parser.

2. Database support:

PHP provides extensive database support, allowing developers to easily interact with various databases. The following are the databases mainly supported by PHP:

1. MySQL: MySQL is a popular open source relational database management system that is perfectly integrated with PHP. PHP provides a wealth of MySQL extensions and functions that can perform operations such as database connection, query, insert, update, and delete.

2. PostgreSQL: PostgreSQL is another powerful open source relational database with good compatibility with PHP. PHP provides a set of extensions and functions that enable developers to easily interact with PostgreSQL databases.

3. SQLite: SQLite is a lightweight embedded relational database that does not require a separate database server. PHP directly supports SQLite and provides a set of functions and classes that enable developers to easily use SQLite databases.

3. File processing:

PHP provides a wealth of file processing functions, which can handle uploading files, reading and writing files, and directory operations. The following are some commonly used file processing functions:

1. File Upload: PHP’s file upload function enables developers to easily receive and process files uploaded through HTML forms. By using these functions, you can verify the file type, size, and other properties, and save the file to a location specified by the server.

2. File operations: PHP provides a set of functions for reading, writing and modifying files. Developers can use these functions to open, close, read, and write files.

3. Directory operations: PHP provides a set of functions for processing directories. Developers can use these functions to create, delete, move, and list directories, as well as determine whether files exist, among other operations.

4. Security:

When developing web applications, security is crucial. PHP provides various security features to protect applications from malicious attacks. Here are some common PHP security features:

1. Input validation: PHP provides various functions and filters for validating and filtering user input. By using these features, developers can protect against security threats such as SQL injection, cross-site scripting (XSS), and cross-site request forgery (CSRF).

2. Access control: PHP can restrict access to sensitive operations and resources through mechanisms such as session management and access control lists (ACLs). Developers can use these mechanisms to authenticate users, restrict access, and enforce access control policies.

3. Encryption and Hashing: PHP provides various encryption algorithms and hashing functions for encrypting and hashing sensitive data. By using these features, developers can protect user passwords, sensitive configuration information, and other important data.

To sum up, PHP's infrastructure includes many aspects such as server environment, database support, file processing and security. These infrastructures provide developers with a complete set of tools and capabilities that enable them to easily build powerful, stable and reliable web applications. .

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