PHP Common Class Summary Recommended Collection_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 - a object-oriented image creation class.
Open Flash Chart - This is a Flash-based statistical chart.
RSS parsing
Interpreting RSS is not a very tedious task, but fortunately you have the following class library to help you easily read RSS feeds.
MagpieRSS - an open source PHP version 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, you have to experience it yourself.
Payment
Does your website need to handle payments? Need a program with a payment gateway? The following program can help you.
PHP Payment Library - supports Paypal, Authorize.net and 2Checkout (2CO)
OpenID
PHP-OpenID - supports OpenID A PHP library. 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 take a look here: http://openid.net.cn/
Data is abstract/object relational mappingORM
ADOdb - DatabaseAbstract
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 for short) 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 converting 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 object databases that comply with the ODMG specification still require class-level metadata.
PDF Generator
FPDF - This is a pure PHP library that allows you to generate PDF.
Excel related
Does your site need to generate Excel? No problem, the following two libraries allow you to do this easily.
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
Don’t like PHP’s mail function? Don’t feel strong enough? The following PHP email-related libraries will definitely not let you down.
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 developing your program, the following libraries and frameworks will definitely help you development.
SimpleTest - A PHP unit testing and web page testing framework.
PHPUnit - From the xUnit family, it provides a framework that allows you to easily carry out unit test case development. And its test results can be analyzed very easily.