define VS $ variable

[johnsmith153]

define('HELLO', 'how are you?');

$hello = "how are you";

 

echo HELLO;

echo $hello

 

 

define or $ variable, which is better and why would you have both?

[Adam]

A define AKA a "constant", has a constant value; once defined it cannot be changed. Variables are also only available within the same scope, constants are global.