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   1  <?php
   2  
   3  // On which page are we ?
   4  if ( is_admin() ) {
   5      // wp-admin pages are checked more carefully
   6      preg_match('#/wp-admin/?(.*?)$#i', $PHP_SELF, $self_matches);
   7      $pagenow = $self_matches[1];
   8      $pagenow = preg_replace('#\?.*?$#', '', $pagenow);
   9      if ( '' === $pagenow || 'index' === $pagenow || 'index.php' === $pagenow ) {
  10          $pagenow = 'index.php';
  11      } else {
  12          preg_match('#(.*?)(/|$)#', $pagenow, $self_matches);
  13          $pagenow = strtolower($self_matches[1]);
  14          if ( '.php' !== substr($pagenow, -4, 4) )
  15              $pagenow .= '.php'; // for Options +Multiviews: /wp-admin/themes/index.php (themes.php is queried)
  16      }
  17  } else {
  18      if ( preg_match('#([^/]+\.php)([?/].*?)?$#i', $PHP_SELF, $self_matches) )
  19          $pagenow = strtolower($self_matches[1]);
  20      else
  21          $pagenow = 'index.php';
  22  }
  23  
  24  // Simple browser detection
  25  $is_lynx = $is_gecko = $is_winIE = $is_macIE = $is_opera = $is_NS4 = false;
  26  
  27  if (strpos($_SERVER['HTTP_USER_AGENT'], 'Lynx') !== false) {
  28      $is_lynx = true;
  29  } elseif (strpos($_SERVER['HTTP_USER_AGENT'], 'Gecko') !== false) {
  30      $is_gecko = true;
  31  } elseif (strpos($_SERVER['HTTP_USER_AGENT'], 'MSIE') !== false && strpos($_SERVER['HTTP_USER_AGENT'], 'Win') !== false) {
  32      $is_winIE = true;
  33  } elseif (strpos($_SERVER['HTTP_USER_AGENT'], 'MSIE') !== false && strpos($_SERVER['HTTP_USER_AGENT'], 'Mac') !== false) {
  34      $is_macIE = true;
  35  } elseif (strpos($_SERVER['HTTP_USER_AGENT'], 'Opera') !== false) {
  36      $is_opera = true;
  37  } elseif (strpos($_SERVER['HTTP_USER_AGENT'], 'Nav') !== false && strpos($_SERVER['HTTP_USER_AGENT'], 'Mozilla/4.') !== false) {
  38      $is_NS4 = true;
  39  }
  40  
  41  $is_IE = ( $is_macIE || $is_winIE );
  42  
  43  // Server detection
  44  $is_apache = ((strpos($_SERVER['SERVER_SOFTWARE'], 'Apache') !== false) || (strpos($_SERVER['SERVER_SOFTWARE'], 'LiteSpeed') !== false)) ? true : false;
  45  $is_IIS = (strpos($_SERVER['SERVER_SOFTWARE'], 'Microsoft-IIS') !== false) ? true : false;
  46  
  47  ?>