What PHP code would be easiest to use if I want to create a new linebreak after each character.
Lets say that I have this string "hello world!". Now what I wan't to do is to make it look like this:

> 
> h
> 
> 
> e
> 
> 
> l
> 
> 
> l
> 
> 
> o
> 
> 
> w
> 
> 
> o
> 
> 
> r
> 
> 
> l
> 
> 
> d
> 
> 
> !
> 
> 
> 

What kind of a code should I use. I only now the linebreak codes and not a code for space between the characters. Thanks in advance!