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| All class groups | All authors | 
| AJAX (192)Interact with the Web server without page reloading | Algorithms (311)Numerical and statistical algorithms | 
| Applications (97)Full applications that perform useful tasks | Artificial intelligence (87)Automation of tasks using human-like intelligence | 
| Astrology (11)Zodiacal signs and horoscope | Audio (118)Voice and music data generation and manipulation | 
| Biology (18)Bioinformatic components and tools that deal with live beings | Blogs (112)Managing and publishing blogs | 
| Business (44)Components to help in the activities of businesses | Cache (168)Managing cached pages or other types of content | 
| Chat (129)Chating and instant messaging | Code Generation (197)Compilers and tools that generate code automatically | 
| Compression (102)Data compression and file archive manipulation | Configuration (142)Configuration formats parsing and generation | 
| Console (127)Command line and console utilities | Content management (512)Components and tools to manage content | 
| Conversion (53)Unit and datatype conversion | Cryptography (246)Encrypting, decrypting and hashing data | 
| Data types (407)Modeling and manipulating data types | Databases (1996)Database management, accessing and searching | 
| Debug (116)Debug data dumping, bug detection and reporting | Design Patterns (421)Implementations of well known design patterns | 
| Documents (10)Document parsing, generation and conversion | E-Commerce (247)Online stores, shopping baskets and payment methods | 
| E-Learning (5)Build online courses and learning resources | Email (308)Email sending and receiving | 
| Emulators (18)System or language emulation | Extensions (1)Extend PHP using code in C, C++ or other languages | 
| FFI (4)Interface with C or C++ libraries using the FFI extension | Files and Folders (1229)Listing, accessing and manipulating files and folders | 
| Finances (158)Money, exchanging, taxes and stocks | Flash (30)Generate and interact with Flash animations | 
| Forums (17)Discussion forums and bulletin board systems | Games (123)Sports and online games | 
| Geography (234)Locations, mapping and demographics | Global (64)Code made of global functions and variables | 
| Graphics (920)Colors, images, charts and picture formats | GUI (33)Graphical User Interface generation and handling | 
| Hardware (37)Communicate with computer hardware and peripheral devices | Health (4)Diagnostic and reports of health related issues | 
| Hosting (44)Web hosting tools and extensions | HTML (1681)HTML generation and processing | 
| HTTP (650)HTTP protocol clients, headers and cookies | Language (412)Constructs to assist in the language control | 
| Libraries (534)Frameworks and libraries of cooperating classes | Literature (3)Compose and publish poems, novels, etc... | 
| Localization (210)Internationalization and translations | Logging (153)Log generation and processing | 
| Mac OS (5)Use of capabilities specific of Apple Mac operating systems | Math (168)Math related classes. | 
| Networking (448)Networking protocols, clients and servers | P2P (11)Peer to peer clients and services | 
| Parsers (232)Programming language interpreters and format parsers | Performance and optimization (102)Tools to measure and optimize the performance of systems | 
| PHP 5 (6708)Classes using PHP 5 specific features | PHP 7 (456)Classes using PHP 7 specific features | 
| PHP 8 (125)Classes using PHP 8 specific features | Physics (20)Physics related classes | 
| Printing (48)Document generation and preparation for printing | Project Management (65)Tools to assist project management | 
| PSR (37)Packages that implement PHP Standard Recommendations by FIG | Searching (200)Search engines, crawling and indexing | 
| Security (375)Security protection and attack detection | SEO (61)Search engine optimization tools | 
| Social Networking (95)Tools and components to integrate with social networking sites | Statistics (116)Collecting, processing and reporting statistical data | 
| Stream wrappers (15)Access resources like regular files | System information (64)Information about servers, processes and operating system facilities | 
| Systems administration (185)System configuration and management | Templates (299)Template processing engines and components | 
| Testing (56)Tools to help verifying that software works as expected | Text processing (881)Manipulating and validating text data | 
| Time and Date (439)Time and date values, formats and conversion | Tools (303)General purpose utilities and tools to simplify software development | 
| Traits (74)Components that implement functionality via traits | Unix (94)Use of capabilities specific of POSIX, Unix like operating systems | 
| User Management (445)User records, authentication and session handling | Validation (482)Validation algorithms | 
| Video (115)Movies and video data generation and manipulation | Weather (19)Weather forecasting | 
| Web services (1303)Web data clipping, SOAP or XML-RPC clients and servers | Windows (69)Use of capabilities specific of the Windows operating systems | 
| Wireless and Mobile (108)Wireless communications, handheld and pocket computing | XML (465)XML parsing and generation | 
| Zephir (3)Components written in Zephir language |