[RESOLVED] Great for \n nl2br but what about keeping indents?

[Shadows]

Hello I'm a little lost on this, I'm displaying the output of a tutorials system and am use htmlentities() and nl2br however when users post information like the body of the tutorial and say it has a piece of code like:

If blah = blah
     Look here, this is indented
end if

but the output makes it appear flat like

If blah = blah
Look here, I'm FLAT
end if

how can I keep any spaces before the start of a string for each line, how can I retrieve that indent????