PHP Manual
2026-08-15
- Copyright
- Getting Started
- Introduction — What is PHP and what can it do?
- A simple tutorial
- Installation and Configuration
- 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
- Features
- 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
- FAQ — Frequently Asked Questions
- General Information
- Mailing lists
- Obtaining PHP
- Database issues
- Installation
- Build Problems
- Using PHP
- Password Hashing — Hashing passwords safely and securely
- PHP and HTML
- PHP and COM
- Miscellaneous Questions
- Appendices
- History of PHP and Related Projects
- About manual examples
- Migrating from PHP 8.4.x to PHP 8.5.x
- Migrating from PHP 8.3.x to PHP 8.4.x
- Migrating from PHP 8.2.x to PHP 8.3.x
- Migrating from PHP 8.1.x to PHP 8.2.x
- Migrating from PHP 8.0.x to PHP 8.1.x
- Migrating from PHP 7.4.x to PHP 8.0.x
- Migrating from PHP 7.3.x to PHP 7.4.x
- Migrating from PHP 7.2.x to PHP 7.3.x
- Migrating from PHP 7.1.x to PHP 7.2.x
- Migrating from PHP 7.0.x to PHP 7.1.x
- Migrating from PHP 5.6.x to PHP 7.0.x
- Migrating from PHP 5.5.x to PHP 5.6.x
- Debugging in PHP
- Configure options
- php.ini directives
- Extension List/Categorization
- List of Function Aliases
- List of Reserved Words
- List of Resource Types
- List of Available Filters
- List of Supported Socket Transports
- PHP type comparison tables
- List of Parser Tokens
- Userland Naming Guide
- About the manual
- Creative Commons Attribution 3.0
- Index listing
- Changelog
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User Contributed Notes
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pcntl_sigtimedwaitWaits for signals, with a timeout
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similar_textCalculate the similarity between two strings
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boolvalGet the boolean value of a variable
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curl_multi_closeClose a set of cURL handles
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imap_bodyRead the message body
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mb_strposFind position of first occurrence of string in a string
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pg_send_prepareSends a request to create a prepared statement with the given parameters, without waiting for completion
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swoole_native_socket_bind
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Arr::prependKeysWith
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zend_versionGets the version of the current Zend engine