Difference between and

Question

Can any one explain me difference between and   ?

I have html data stored in database in binary form and space in that can be either

Answer 1

is the classic space, the one you get when you hit your spacebar, represented by his HTML entity equivalent.

  and   represents the non-breaking space, often used to prevent collapse of multiple spaces togethers by the browser :

" " => " " (collapsed into only one space)

"    " => "    " (not collapsed)

If you are parsing a string containing both classic and non-breaking spaces, you can safely replace one by the other.