Difference between revisions of "Variables in PHP"
From OdleWiki
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#always begin with a dollar sign ($) | #always begin with a dollar sign ($) | ||
| − | # | + | #start with a letter or underscore (_) |
#may contain any number of letters, numbers, and underscores | #may contain any number of letters, numbers, and underscores | ||
#are case-sensitive | #are case-sensitive | ||
Revision as of 17:30, 31 July 2012
This page describes documentation valid for PHP 4 and PHP 5.
Contents
Basics
Variables in PHP:
- always begin with a dollar sign ($)
- start with a letter or underscore (_)
- may contain any number of letters, numbers, and underscores
- are case-sensitive
Examples of Acceptable Variable Names
$var
$_var
$_Var
>$VAR
$VAR_001
This is not a comprehensive list, merely examples.
Examples of 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 Variables
Assigning Values to Variables
To assign a value to a variable, use a single equal sign (=)
$var = "Hello, world."
