Summary of 20 commonly used PHP class libraries_PHP tutorial
Chart Library
The following class library allows you to easily create complex charts and pictures. Of course, they require support from the GD library.
- pChart - A library for creating statistical charts.
- Libchart - This is also a simple statistical gallery.
- JpGraph - an object-oriented image creation class.
- Open Flash Chart - This is a Flash-based statistical chart.
RSS parsing
- MagpieRSS - an open source PHP version of the RSS parser, said to be powerful but not verified.
- SimplePie - This is a very fast and easy-to-use RSS and Atom parsing library.
Thumbnail generation
- phpThumb - The function is very powerful. It’s up to you to experience how powerful it is.
Payment
- PHP Payment Library - supports Paypal, Authorize.net and 2Checkout (2CO)
OpenID
- PHP-OpenID - A PHP library that supports OpenID. OpenID is a solution that helps you log into different websites using the same username and password. If you are not familiar with OpenID, you can check it out here: http://openid.net.cn/
Data is abstract/object relational mapping ORM
- ADOdb - database abstraction
- Doctrine - Object relational mapper (ORM), requires PHP 5.2.3+ version, a very powerful database abstraction layer (DBAL).
- Propel - Object Relational Mapping Framework - PHP5
- Outlet - is also a tool for object-relational mapping.
Note: Object Relational Mapping (ORM) is a technology designed to solve the mismatch between object-oriented and relational databases. Simply put, ORM automatically persists objects in a program into a relational database by using metadata that describes the mapping between objects and databases. Essentially, it converts data from one form to another. This also implies additional execution overhead; however, if the ORM is implemented as a middleware, there are many opportunities for optimizations that do not exist in a hand-written persistence layer. More importantly, the metadata used to control transformations needs to be provided and managed; but again, these costs are less than maintaining a handwritten solution; and even ODMG-compliant object databases still require class-level metadata.
PDF Generator
- FPDF - This is a pure PHP library that allows you to generate PDF.
Excel related
- php-excel - This is a very simple Excel file generation class.
- PHP Excel Reader - can parse and read data in XLS files.
E-Mail related
- Swift Mailer - Free super multifunctional PHP email library.
- PHPMailer - Super powerful email sending class.
Unit testing
If you are using a test-driven approach to develop your program, the following libraries and frameworks will definitely help you in your development.
- SimpleTest - A PHP unit testing and web page testing framework.
- PHPUnit - from the xUnit family, provides a framework that allows you to easily carry out unit test case development. And its test results can be analyzed very easily.

The main advantages of using database storage sessions include persistence, scalability, and security. 1. Persistence: Even if the server restarts, the session data can remain unchanged. 2. Scalability: Applicable to distributed systems, ensuring that session data is synchronized between multiple servers. 3. Security: The database provides encrypted storage to protect sensitive information.

Implementing custom session processing in PHP can be done by implementing the SessionHandlerInterface interface. The specific steps include: 1) Creating a class that implements SessionHandlerInterface, such as CustomSessionHandler; 2) Rewriting methods in the interface (such as open, close, read, write, destroy, gc) to define the life cycle and storage method of session data; 3) Register a custom session processor in a PHP script and start the session. This allows data to be stored in media such as MySQL and Redis to improve performance, security and scalability.

SessionID is a mechanism used in web applications to track user session status. 1. It is a randomly generated string used to maintain user's identity information during multiple interactions between the user and the server. 2. The server generates and sends it to the client through cookies or URL parameters to help identify and associate these requests in multiple requests of the user. 3. Generation usually uses random algorithms to ensure uniqueness and unpredictability. 4. In actual development, in-memory databases such as Redis can be used to store session data to improve performance and security.

Managing sessions in stateless environments such as APIs can be achieved by using JWT or cookies. 1. JWT is suitable for statelessness and scalability, but it is large in size when it comes to big data. 2.Cookies are more traditional and easy to implement, but they need to be configured with caution to ensure security.

To protect the application from session-related XSS attacks, the following measures are required: 1. Set the HttpOnly and Secure flags to protect the session cookies. 2. Export codes for all user inputs. 3. Implement content security policy (CSP) to limit script sources. Through these policies, session-related XSS attacks can be effectively protected and user data can be ensured.

Methods to optimize PHP session performance include: 1. Delay session start, 2. Use database to store sessions, 3. Compress session data, 4. Manage session life cycle, and 5. Implement session sharing. These strategies can significantly improve the efficiency of applications in high concurrency environments.

Thesession.gc_maxlifetimesettinginPHPdeterminesthelifespanofsessiondata,setinseconds.1)It'sconfiguredinphp.iniorviaini_set().2)Abalanceisneededtoavoidperformanceissuesandunexpectedlogouts.3)PHP'sgarbagecollectionisprobabilistic,influencedbygc_probabi

In PHP, you can use the session_name() function to configure the session name. The specific steps are as follows: 1. Use the session_name() function to set the session name, such as session_name("my_session"). 2. After setting the session name, call session_start() to start the session. Configuring session names can avoid session data conflicts between multiple applications and enhance security, but pay attention to the uniqueness, security, length and setting timing of session names.


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