Check out the following :

  Browser Detection and Appropriate CSS Generation    :
  -----------------------------------------------------
  http://www.phpbuilder.com/columns/tim20000821.php3
  
  phpSniff                                            :
  -----------------------------------------------------
  http://www.sourceforge.net/projects/phpsniff/

And as already stated, the predefined variable $HTTP_USER_AGENT is what
makes all this happen.  Predefined variables are good :

  http://www.php.net/manual/en/language.variables.predefined.php

That phpbuilder article will probably be of most use to you, it contains
examples to do about anything with $HTTP_USER_AGENT.

Also, check out the get_browser() function :

  http://www.php.net/manual/en/function.get-browser.php

Although it takes a little work to get running :)

Regards,
Philip Olson

On Tue, 25 Sep 2001, wm wrote:

> hi all,
> 
> anybody know the function for browser detection?
> 
> what i want to do is set a variable $spacerheight to a value dependent
> upon whether the user is on a mac or a pc.
> 
> then i can say height=<? echo "$spacerheight"; ?> in the html.
> 
> i tried using javascript a few diff ways with this and it didn't work.
> 
> so, if anybody knows that function or if there is another way, please
> let
> me know.
> 
> thanks.
> 
> 
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