Difference between revisions of "Variables in PHP"
From OdleWiki
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===Acceptable Variable Names=== | ===Acceptable Variable Names=== | ||
| − | <nowiki>$var<br /> | + | <nowiki>$var</nowiki><br /> |
| − | $_var<br /> | + | <nowiki>$_var</nowiki><br /> |
| − | $ | + | <nowiki>$_Va</nowiki>r<br /> |
| − | $VAR<br /> | + | <nowiki>$VAR</nowiki><br /> |
| − | $VAR_001</nowiki> | + | <nowiki>$VAR_001</nowiki> |
This is not a comprehensive list, merely examples. | This is not a comprehensive list, merely examples. | ||
Revision as of 15:18, 30 July 2012
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 Variables
Assigning Values to Variables
To assign a value to a variable, use a single equal sign (=)
$var = "Hello, world."
