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PHP 8.1.31 Released!
Getting Started
Introduction
A simple tutorial
Language Reference
Basic syntax
Types
Variables
Constants
Expressions
Operators
Control Structures
Functions
Classes and Objects
Namespaces
Enumerations
Errors
Exceptions
Fibers
Generators
Attributes
References Explained
Predefined Variables
Predefined Exceptions
Predefined Interfaces and Classes
Predefined Attributes
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
User Submitted Data
Hiding PHP
Keeping Current
Features
HTTP authentication with PHP
Cookies
Sessions
Handling file uploads
Using remote files
Connection handling
Persistent Database Connections
Command line usage
Garbage Collection
DTrace Dynamic Tracing
Function Reference
Affecting PHP's Behaviour
Audio Formats Manipulation
Authentication Services
Command Line Specific Extensions
Compression and Archive Extensions
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
Other Basic Extensions
Other Services
Search Engine Extensions
Server Specific Extensions
Session Extensions
Text Processing
Variable and Type Related Extensions
Web Services
Windows Only Extensions
XML Manipulation
GUI Extensions
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Installation and Configuration
General Installation Considerations
Installation on Unix systems
Installing from packages on Debian GNU/Linux and related distributions
Installing from packages on GNU/Linux distributions that use DNF
Installing from packages or ports on OpenBSD
Installing from source on Unix and macOS systems
CGI and command line setups
Apache 2.x on Unix systems
Nginx 1.4.x on Unix systems
Lighttpd 1.4 on Unix systems
LiteSpeed Web Server/OpenLiteSpeed Web Server on Unix systems
Solaris specific installation tips
Installation on macOS
Installation on macOS using third-party packages
Compiling PHP on macOS
Using the bundled PHP prior to macOS Monterey
Installation on Windows systems
Recommended configuration on Windows systems
Manual installation of pre-built binaries
Installation for Apache 2.x on Windows systems
Installation with IIS for Windows
Third-party tools for installing PHP
Building from source
Running PHP on the command line on Windows systems
Installation on Cloud Computing platforms
Azure App Services
Amazon EC2
DigitalOcean
FastCGI Process Manager (FPM)
Installation
Configuration
Installation of PECL extensions
Introduction to PECL Installations
Downloading PECL extensions
Installing a PHP extension on Windows
Compiling shared PECL extensions with the pecl command
Compiling shared PECL extensions with phpize
php-config
Compiling PECL extensions statically into PHP
Runtime Configuration
The configuration file
.user.ini files
Where a configuration setting may be set
How to change configuration settings
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