PHP Quick Reference

PHP Getting Started

PHP Downloads

PHP Language Reference

Basic syntax
Types
Variables
Constants
- Syntax
- Magic constants
Expressions
Operators
Control Structures
Functions
Classes and Objects
Namespaces
Errors
- Basics
- Errors in PHP 7
Exceptions
- Extending Exceptions
Generators
References Explained
Predefined Variables
- Superglobals - Superglobals are built-in variables that are always available in all scopes
- $GLOBALS - References all variables available in global scope
- $_SERVER - Server and execution environment information
- $_GET - HTTP GET variables
- $_POST - HTTP POST variables
- $_FILES - HTTP File Upload variables
- $_REQUEST - HTTP Request variables
- $_SESSION - Session variables
- $_ENV - Environment variables
- $_COOKIE - HTTP Cookies
- $php_errormsg - The previous error message
- $http_response_header - HTTP response headers
- $argc - The number of arguments passed to script
- $argv - Array of arguments passed to script
Predefined Exceptions
Predefined Interfaces and Classes
- Traversable - The Traversable interface
- Iterator - The Iterator interface
- IteratorAggregate - The IteratorAggregate interface
- Throwable
- ArrayAccess - The ArrayAccess interface
- Serializable - The Serializable interface
- Closure - The Closure class
- Generator - The Generator class
- WeakReference - The WeakReference class
Context options and parameters
- Socket context options - Socket context option listing
- HTTP context options - HTTP context option listing
- FTP context options - FTP context option listing
- SSL context options - SSL context option listing
- CURL context options - CURL context option listing
- Phar context options - Phar context option listing
- MongoDB context options - MongoDB context option listing
- Context parameters - Context parameter listing
- Zip context options - Zip context option listing
Supported Protocols and Wrappers
- file:// - Accessing local filesystem
- http:// - Accessing HTTP(s) URLs
- ftp:// - Accessing FTP(s) URLs
- php:// - Accessing various I/O streams
- zlib:// - Compression Streams
- data:// - Data (RFC 2397)
- glob:// - Find pathnames matching pattern
- phar:// - PHP Archive
- ssh2:// - Secure Shell 2
- rar:// - RAR
- ogg:// - Audio streams
- expect:// - Process Interaction Streams

PHP Features

HTTP authentication with PHP
Cookies
Sessions
Dealing with XForms
Handling file uploads
Using remote files
Connection handling
Persistent Database Connections
Command line usage - Using PHP from the command line
- Introduction
- Differences to other SAPIs
- Options - Command line options
- Usage - Executing PHP files
- I/O streams - Input/output streams
- Interactive shell
- Built-in web server
- INI settings
Garbage Collection
DTrace Dynamic Tracing

PHP Security

PHP Function Reference

Affecting PHP's Behaviour
- APCu - APC User Cache
- BLENC - Blenc - BLowfish ENCoder for PHP source scripts
- Componere
- Error Handling - Error Handling and Logging
- FFI - Foreign Function Interface
- ~~Memtrack~~ - Deprecated
- OPcache
- Output Control - Output Buffering Control
- PHP Options/Info - PHP Options and Information
- phpdbg - Interactive PHP Debugger
- runkit7
- uopz - User Operations for Zend
- Weakref - Weak References
- WinCache - Windows Cache for PHP
- Xhprof - Hierarchical Profiler
- Yac
Audio Formats Manipulation
- OpenAL - OpenAL Audio Bindings
Authentication Services
- Radius
Command Line Specific Extensions
- Ncurses - Ncurses Terminal Screen Control
- Readline - GNU Readline
Compression and Archive Extensions
- Bzip2
- LZF
- Phar
- Rar - Rar Archiving
- Zip
- Zlib - Zlib Compression
Cryptography Extensions
- CSPRNG
- Hash - HASH Message Digest Framework
- Mcrypt
- Mhash
- OpenSSL
- Password Hashing
- Sodium
Database Extensions
- Abstraction Layers
- Vendor Specific Database Extensions
Date and Time Related Extensions
- Calendar
- Date/Time - Date and Time
- HRTime - High resolution timing
File System Related Extensions
- Direct IO
- Directories
- Fileinfo - File Information
- Filesystem
- Inotify
- ~~Mimetype~~ - Deprecated
- Proctitle
- xattr
- xdiff
Human Language and Character Encoding Support
- Enchant - Enchant spelling library
- Gender - Determine gender of firstnames
- Gettext
- iconv
- intl - Internationalization Functions
- Multibyte String
- Pspell
- Recode - GNU Recode
Image Processing and Generation
- Exif - Exchangeable image information
- GD - Image Processing and GD
- Gmagick
- ImageMagick - Image Processing (ImageMagick)
Mail Related Extensions
- IMAP - IMAP, POP3 and NNTP
- Mail
- Mailparse
Mathematical Extensions
- BC Math - BCMath Arbitrary Precision Mathematics
- GMP - GNU Multiple Precision
- Math - Mathematical Functions
- Trader - Technical Analysis for Traders
Non-Text MIME Output
- FDF - Forms Data Format
- GnuPG - GNU Privacy Guard
- wkhtmltox
- PS - PostScript document creation
- RpmInfo
- XLSWriter
Process Control Extensions
- Eio
- Ev
- Expect
- PCNTL - Process Control
- POSIX
- Program execution - System program execution
- parallel
- pthreads
- pht
- Semaphore - Semaphore, Shared Memory and IPC
- Shared Memory
- Sync
Other Basic Extensions
- GeoIP - Geo IP Location
- FANN - FANN (Fast Artificial Neural Network)
- JSON - JavaScript Object Notation
- Judy - Judy Arrays
- Lua
- LuaSandbox
- Misc. - Miscellaneous Functions
- Seaslog
- SPL - Standard PHP Library (SPL)
- SPL Types - SPL Type Handling
- Streams
- Swoole
- Tidy
- Tokenizer
- URLs
- V8js - V8 Javascript Engine Integration
- Yaml - YAML Data Serialization
- Yaf - Yet Another Framework
- Yaconf
- Taint
- Data Structures
Other Services
- cURL - Client URL Library
- Event
- FTP
- Gearman
- LDAP - Lightweight Directory Access Protocol
- Memcache
- Memcached
- mqseries
- Network
- RRD - RRDtool
- ScoutAPM
- SNMP
- Sockets
- SSH2 - Secure Shell2
- Stomp - Stomp Client
- SVM - Support Vector Machine
- SVN - Subversion
- TCP - TCP Wrappers
- Varnish
- YAZ
- 0MQ messaging - ZMQ
- ZooKeeper
Search Engine Extensions
- Solr - Apache Solr
- Sphinx - Sphinx Client
Server Specific Extensions
- Apache
- FastCGI Process Manager
- IIS - IIS Administration
- NSAPI
Session Extensions
- Sessions - Session Handling
Text Processing
- CommonMark
- Parle - Parsing and lexing
- PCRE - Regular Expressions (Perl-Compatible)
- POSIX Regex - Regular Expression (POSIX Extended)
- ssdeep - ssdeep Fuzzy Hashing
- Strings
Variable and Type Related Extensions
- Arrays
- Classes/Objects - Class/Object Information
- Classkit
- Ctype - Character type checking
- Filter - Data Filtering
- Function Handling
- Quickhash
- Reflection
- Variable handling
Web Services
- OAuth
- SOAP
- Yar - Yet Another RPC Framework
- XML-RPC
Windows Only Extensions
- COM - COM and .Net (Windows)
- win32service
XML Manipulation
- DOM - Document Object Model
- libxml
- SDO - Service Data Objects
- SDO-DAS-Relational - SDO Relational Data Access Service
- SDO DAS XML - SDO XML Data Access Service
- SimpleXML
- WDDX
- XMLDiff - XML diff and merge
- XML Parser
- XMLReader
- XMLWriter
- XSL
GUI Extensions
- UI

PHP-GTK (GUI applications)

PHP Appendices

PHP Deprecated Extensions

These extensions have been deprecated usually in the favor of some other extensions.

~~Memtrack~~ - Deprecated
~~Mimetype~~ - Deprecated

~~Safe Mode~~ - Deprecated as of PHP 5.3 and removed as of PHP 5.4

PHP Core Extensions

These are not actual extensions. They are part of the PHP core and cannot be left out of a PHP binary with compilation options.

PHP Bundled Extensions

These extensions are bundled with PHP.

PHP External Extensions

These extensions are bundled with PHP but in order to compile them, external libraries will be needed.

PHP PECL Extensions

These extensions are available from » PECL. They may require external libraries. More PECL extensions exist but they are not documented in the PHP manual yet.

PHP Experimental Extensions

The behaviour of these extensions - including the names of their functions and anything else documented about these extensions - may change without notice in a future release of PHP. Use these extensions at your own risk.

PHP PEAR Extensions

These extensions are available from » PEAR.

PHP Frameworks and Applications

PaaS Providers:

WAMP Packages:
- AMPPS
- Bitnami
- MAMP (OS X & Win)
- Uniform Server
- Web Platform Installer
- XAMPP
- Zend Server CE

Source Code Repositories:
- Bitbucket
- CodePlex
- GitHub
- Gitorious
- Google Code
- Hot Scripts
- Launchpad
- Packagist (Composer)
- PHP Classes
- SourceForge

Online Backup Services:

PHP Accelerators & Caching:
- APC
- APC Functions (object caching)
- APCu (object caching)
- HHVM (virtual machine)
- Memcached (object caching)
- Redis (object caching)
- WinCache
- WinCache Functions (object caching)
- XCache APIs (object caching)
- XCache
- Zend Optimizer

Useful Tools:
- Assetic (asset management)
- Composer (dependency manager)
- DesignPatternsPHP (design patterns)
- MantisBT (bugtracking)
- PHP_Debug (debugger)
- phpDocumentor (documentation)
- PHPSpec (test-driven)
- PHPUnit (unit testing)
- React (event-driven)
- Xdebug (debugger, profiler)

Frameworks:
- Aura Project
- CakePHP
- CodeIgniter
- Fat-Free (micro)
- FuelPHP
- Joomla! Framework
- Kohana
- Laravel
- MicroMVC (micro)
- Nette Framework
- Phalcon (PHP extension)
- PHPixie
- PPI (interoperability fw)
- Silex (micro)
- Slim (micro)
- Symfony2
- Yaf (PHP extension)
- Yii Framework
- Zend Framework

Database Management:
- Adminer (single file SQL/NoSQL admin)
- Cassandra Cluster Admin (Cassandra)
- phpLiteAdmin (SQLite)
- phpMyAdmin (MySQL)
- phpPgAdmin (PostgreSQL)
- RockMongo (MongoDB)

ORM, ODM, Abstraction Layer:
- Aura.Sql
- ADOdb
- Cassandra PCL
- Doctrine
- NotORM
- Propel

Template Engines:
- Open Power Template
- PHPTAL
- RainTPL
- Smarty
- TinyButStrong
- Twig

Useful Libraries:
- dompdf (PDF documents)
- Facebook PHP SDK (Facebook SDK)
- Faker (fake data generator)
- Guzzle (HTTP client)
- HTML Purifier (HTML filter)
- Imagine (image manipulation)
- lessphp (LESS compiler)
- minify (minifier)
- Mobile Detect (mobile detecting)
- mPDF (PDF documents)
- PHP Excel (XLS documents)
- PHP Thumb (image manipulation)
- PHPMailer, PHPMailer fork (mailer)
- QueryPath (HTML/XML manipulation)
- Validation (validation engine)
- Swift Mailer (mailer)
- TCPDF (PDF documents)
- Tiny Tiny RSS (RSS aggregator)