Variables in PHP
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Contents
Basics
Variables in PHP:
- always begin with a dollar sign ($)
- starts with a letter or underscore (_)
- may contain any number of letters, numbers, and underscores
- are case-sensitive
Acceptable Variable Names
$var $_var $_Var $VAR $VAR_001
This is not a comprehensive list, merely examples.
Unacceptable Variable Names
$var* (Variable names may only contain letters, numbers, and underscores.) $var #1 (Variable names may not contain # or spaces.) var$ (Variables names must begin with a dollar sign.)
Types of Variable
Assigning Values to Variables
To assign a value to a variable, use a single equal sign (=)
$var = "Hello, world."
