PHP enabled stylesheets Page 8

Warning: Be careful, each browser on each platform reacts differently to
those instructions and tests are required to make sure that your Javascript will
behave as expected. Even the browser detection scripts on website such as
Javascript.com cannot be considered as working correctly in all situations.

An easy way to make the $platform variable to the PHP code is to
recall the index file with some parameters. This is almost invisible for the
visitor but do not forget to include a $detect variable
(initialised to true if not set) to avoid to enter a loop where the
index file is replaced and replaced again. As soon as the parameter (here
platform) is detected, the $detect variable is set to false.
The
variable $platform is now available to the index file and therefore
to the stylesheet. You can test it using a switch() { case: ; }
block and, in our example, increase the font size by 2 in case a Mac based
platform is detected (extracted from stylesheet.css.php):

<?php
body, h1, h2, h3, h4, h5, h6, p { 
 font-size:<?php 
 switch($platform) {
  case 'mac';
   print($VISUALS[$SkinID]['page']['fontsize'] + 2;
   break;
  default:
   print($VISUALS[$SkinID]['page']['fontsize'];
   break;
  } 
 print( $VISUALS[$SkinID]['page']['fontunit'] ); ?>;
 ?>;
}
?>

The value of this increment should depend on the font unit that you use (px,
pt, em, etc.). This increment could also be declared as a new visual parameter
to be included in your visual configuration file as:

<?php
$VISUALS[0]['page']['fontsize']['increment']
?>

(extracted from
visuals.inc).