Home
My Account
About us
Products
Support Services
Buy online
Downloads
Overview
KB
Technical FAQ
PHP Manual
CSS2 Manual
HTML Manual
JS Guide
JS Reference
PhpDock Manual
Nu-Coder Manual
PhpExpress Manual
PHP Joomla
Development
Learn PHP
PHP Manual
Language Reference
Basic syntax
Types
Variables
Constants
Expressions
Operators
Control Structures
Functions
Classes and Objects
Namespaces
Enumerations
Error Handling
Fibers
Generators
Attributes
References Explained
Predefined Variables
Predefined Exceptions
Predefined Interfaces and Classes
Predefined Attributes
Context options and parameters
Supported Protocols and Wrappers
Declaring Attribute Classes
What References Are
Language Reference
Last updated: Mon, 26 Oct 2026
References Explained
Table of Contents
What References Are
What References Do
What References Are Not
Passing by Reference
Returning References
Unsetting References
Spotting References
Declaring Attribute Classes
What References Are
Language Reference
Last updated: Mon, 26 Oct 2026