Variables

Variables allow you to store and retrieve frequently used data.?

PHP Code:

Web Browser Result:

All variables start with a dollar sign ($).

The name of the variable can consist of letters and numbers, but must begin with a letter.? It can also contain special characters like underscore '_', see the variable section in the manual for more information.

Variables in PHP can also contain different data types, for instance:
$string = 2;
$string = "blue";