Why we use $ in php?

Answer 1

It's like asking why HTML uses <>

Answer 2

The only thing that is useless is your question.

Answer 3

Because we all love money and want to get rich ;)

Answer 4

$ is a prefix to variable names.
so you may define a variable x as :
$x= "hello"

Answer 5

every language has uniqe syntax

Answer 6

if you don't know answer so plz don't give any useless speech.