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PHP Manual
Appendices
Appendices
History of PHP and Related Projects
History of PHP
History of PHP related projects
Books about PHP
Publications about PHP
Migrating from PHP 8.0.x to PHP 8.1.x
New Features
New Classes and Interfaces
New Functions
New Global Constants
Backward Incompatible Changes
Deprecated Features
Other Changes
Migrating from PHP 7.4.x to PHP 8.0.x
New Features
Backward Incompatible Changes
Deprecated Features
Other Changes
Migrating from PHP 7.3.x to PHP 7.4.x
New Features
New Classes and Interfaces
New Functions
New Global Constants
Backward Incompatible Changes
Deprecated Features
Removed Extensions
Other Changes
Windows Support
Migrating from PHP 7.2.x to PHP 7.3.x
New Features
New Functions
New Global Constants
Backward Incompatible Changes
Deprecated Features
Other Changes
Windows Support
Migrating from PHP 7.1.x to PHP 7.2.x
New features
New functions
New global constants
Backward incompatible changes
Deprecated features in PHP 7.2.x
Other changes
Migrating from PHP 7.0.x to PHP 7.1.x
New features
New functions
New global constants
Backward incompatible changes
Deprecated features in PHP 7.1.x
Changed functions
Other changes
Windows Support
Migrating from PHP 5.6.x to PHP 7.0.x
Backward incompatible changes
New features
Deprecated features in PHP 7.0.x
Changed functions
New functions
New Classes and Interfaces
New Global Constants
Changes in SAPI Modules
Removed Extensions and SAPIs
Other Changes
Migrating from PHP 5.5.x to PHP 5.6.x
Backward incompatible changes
New features
Deprecated features in PHP 5.6.x
Changed functions
New functions
OpenSSL changes in PHP 5.6.x
Other changes to extensions
New global constants
Debugging in PHP
About debugging in PHP
Configure options
List of core configure options
php.ini directives
List of php.ini directives
List of php.ini sections
Description of core php.ini directives
Extension List/Categorization
Alphabetical
Membership
State
List of Function Aliases
List of Reserved Words
List of Keywords
Predefined Classes
Predefined Constants
List of other reserved words
List of Resource Types
List of Available Filters
String Filters
Conversion Filters
Compression Filters
Encryption Filters
List of Supported Socket Transports
Internet Domain: TCP, UDP, SSL, and TLS
Unix Domain: Unix and UDG
PHP type comparison tables
List of Parser Tokens
Userland Naming Guide
Global Namespace
Rules
Tips
About the manual
Formats
About user notes
How to read a function definition (prototype)
PHP versions documented in this manual
How to find more information about PHP
How to help improve the documentation
How we generate the formats
Translations
Creative Commons Attribution 3.0
Index listing
Function and Method listing
Example listing
Changelog