Documentation

• Language Reference

  • Basic syntax
  • Types
  • Variables
  • Constants
  • Expressions
  • Operators
  • Control Structures
  • Functions
  • Classes and Objects
  • Namespaces
  • Errors
  • 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_RAW_POST_DATA - Raw POST data
    • $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

• Context options and parameters

• Supported Protocols and Wrappers

• Security

  • Introduction
  • General considerations
  • Installed as CGI binary
  • Installed as an Apache module
  • Session Security
  • Filesystem Security
  • Database Security
  • Error Reporting
  • Using Register Globals
  • User Submitted Data
  • Magic Quotes
  • Hiding PHP
  • Keeping Current

• Features

  • HTTP authentication with PHP
  • Cookies
  • Sessions
  • Dealing with XForms
  • Handling file uploads
  • Using remote files
  • Connection handling
  • Persistent Database Connections
  • Safe Mode
  • Command line usage - Using PHP from the command line
  • Garbage Collection
  • DTrace Dynamic Tracing

• Function Reference

  • Affecting PHP's Behaviour
  • Audio Formats Manipulation
  • Authentication Services
  • Command Line Specific Extensions
  • Compression and Archive Extensions
  • Credit Card Processing
  • Cryptography Extensions
  • Database Extensions
  • Date and Time Related Extensions
  • File System Related Extensions
  • Human Language and Character Encoding Support
  • Image Processing and Generation
  • Mail Related Extensions
  • Mathematical Extensions
  • Non-Text MIME Output
  • Process Control Extensions
    • Eio
    • Ev
    • Expect
    • Libevent
    • PCNTL - Process Control
    • POSIX
    • Program execution - System program execution
    • parallel
    • pthreads
    • pht
    • Semaphore - Semaphore, Shared Memory and IPC
    • Shared Memory
    • Sync

• Other Basic Extensions

• Other Services

  • chdb - Constant hash database
  • cURL - Client URL Library
  • Event
  • FAM - File Alteration Monitor
  • FTP
  • Gearman
  • Gopher - Net Gopher
  • Gupnp
  • Hyperwave API
  • LDAP - Lightweight Directory Access Protocol
  • Memcache
  • Memcached
  • mqseries
  • Network
  • RRD - RRDtool
  • SAM - Simple Asynchronous Messaging
  • ScoutAPM
  • SNMP
  • Sockets
  • SSH2 - Secure Shell2
  • Stomp - Stomp Client
  • SVM - Support Vector Machine
  • SVN - Subversion
  • TCP - TCP Wrappers
  • Varnish
  • YAZ
  • YP/NIS
  • 0MQ messaging - ZMQ
  • ZooKeeper

• Search Engine Extensions

• Server Specific Extensions

• Session Extensions

• Text Processing

• Variable and Type Related Extensions

  • Predefined Constants
  • Variable handling Functions
    • boolval - Get the boolean value of a variable
    • debug_zval_dump - Dumps a string representation of an internal zend value to output
    • doubleval - Alias of floatval
    • empty - Determine whether a variable is empty
    • floatval - Get float value of a variable
    • get_defined_vars - Returns an array of all defined variables
    • get_resource_type - Returns the resource type
    • gettype - Get the type of a variable
    • import_request_variables - Import GET/POST/Cookie variables into the global scope
    • intval - Get the integer value of a variable
    • is_array - Finds whether a variable is an array
    • is_bool - Finds out whether a variable is a boolean
    • is_callable - Verify that the contents of a variable can be called as a function
    • is_countable - Verify that the contents of a variable is a countable value
    • is_double - Alias of is_float
    • is_float - Finds whether the type of a variable is float
    • is_int - Find whether the type of a variable is integer
    • is_integer - Alias of is_int
    • is_iterable - Verify that the contents of a variable is an iterable value
    • is_long - Alias of is_int
    • is_null - Finds whether a variable is NULL
    • is_numeric - Finds whether a variable is a number or a numeric string
    • is_object - Finds whether a variable is an object
    • is_real - Alias of is_float
    • is_resource - Finds whether a variable is a resource
    • is_scalar - Finds whether a variable is a scalar
    • is_string - Find whether the type of a variable is string
    • isset - Determine if a variable is declared and is different than NULL
    • print_r - Prints human-readable information about a variable
    • serialize - Generates a storable representation of a value
    • settype - Set the type of a variable
    • strval - Get string value of a variable
    • unserialize - Creates a PHP value from a stored representation
    • unset - Unset a given variable (unset() destroys the specified variables.)
    • var_dump - Dumps information about a variable
    • var_export - Outputs or returns a parsable string representation of a variable

• Web Services

• Windows Only Extensions

• XML Manipulation

• GUI Extensions

• PHP at the Core: A Hacker's Guide

  • Preface
  • Memory management
  • Working with Variables
  • Writing Functions
  • Writing Classes
  • Working with Resources
  • Working with INI settings
  • Working with streams
  • The "counter" Extension - A Continuing Example
  • The PHP 5 build system
  • Extension structure
  • PDO Driver How-To
  • Extension FAQs
  • Zend Engine 2 API reference
  • Zend Engine 2 Opcodes
  • Zend Engine 1

• FAQ - FAQ: Frequently Asked Questions

  • General Information
  • Mailing lists
  • Obtaining PHP
  • Database issues
  • Installation
  • Build Problems
  • Using PHP
  • Password Hashing - Safe Password Hashing
  • PHP and HTML
  • PHP and COM
  • Miscellaneous Questions