PHP Manual
Language Reference
Basic syntax
Types
Variables
Constants
Expressions
Operators
Control Structures
Functions
Classes and Objects
Namespaces
Exceptions
Generators
References Explained
Predefined Variables
Predefined Exceptions
Predefined Interfaces and Classes
Context options and parameters
Supported Protocols and Wrappers
Comments
Introduction
Language Reference
PHP Manual
Types
Table of Contents
Introduction
Booleans
Integers
Floating point numbers
Strings
Arrays
Objects
Resources
NULL
Callbacks
Pseudo-types and variables used in this documentation
Type Juggling