PHP: How to know the server is Windows or Linux?

A simple function to judge the running environment: Is the script running in Windows or Linux?

This is useful for PHP script compatible: Codeing and Testing in local Windows environment, such as Windows XAMPP; while formly running in Linux production server. Here is the script:

function get_env() {
if(isset($_SERVER['SERVER_SOFTWARE'])) {
  if(preg_match('/Win32/i', $_SERVER['SERVER_SOFTWARE']))
   return 'Windows';
  return 'Unix';
 }
}
// In the top of the script:
if(get_env()=='Windows')
 define('PATH', '.windows_dir');
else
 define('PATH', './linux_dir/');

CSS: Shorthand of background

CSS’s ’background’ attribute has many options. The following lists these options and gives examples to use the shorthand property of ’background‘:

1. background-color
2. background-image
3. background-repeat
4. background-attachment
5. background-position

body {background:#ffffff url('img_tree.png') no-repeat right top;}
background:#5d9ab2 url('img_tree.png') no-repeat top left;
$(element)..css({'background-color': '#ffe', 'border-left': '5px solid #ccc'})

Similiar, for font: