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   1  <?php
   2  /**
   3   * Creates common globals for the rest of WordPress
   4   *
   5   * Sets $pagenow global which is the current page. Checks
   6   * for the browser to set which one is currently being used.
   7   *
   8   * Detects which user environment WordPress is being used on.
   9   * Only attempts to check for Apache and IIS. Two web servers
  10   * with known permalink capability.
  11   *
  12   * @package WordPress
  13   */
  14  
  15  // On which page are we ?
  16  if ( is_admin() ) {
  17      // wp-admin pages are checked more carefully
  18      preg_match('#/wp-admin/?(.*?)$#i', $PHP_SELF, $self_matches);
  19      $pagenow = $self_matches[1];
  20      $pagenow = trim($pagenow, '/');
  21      $pagenow = preg_replace('#\?.*?$#', '', $pagenow);
  22      if ( '' === $pagenow || 'index' === $pagenow || 'index.php' === $pagenow ) {
  23          $pagenow = 'index.php';
  24      } else {
  25          preg_match('#(.*?)(/|$)#', $pagenow, $self_matches);
  26          $pagenow = strtolower($self_matches[1]);
  27          if ( '.php' !== substr($pagenow, -4, 4) )
  28              $pagenow .= '.php'; // for Options +Multiviews: /wp-admin/themes/index.php (themes.php is queried)
  29      }
  30  } else {
  31      if ( preg_match('#([^/]+\.php)([?/].*?)?$#i', $PHP_SELF, $self_matches) )
  32          $pagenow = strtolower($self_matches[1]);
  33      else
  34          $pagenow = 'index.php';
  35  }
  36  
  37  // Simple browser detection
  38  $is_lynx = $is_gecko = $is_winIE = $is_macIE = $is_opera = $is_NS4 = $is_safari = $is_chrome = $is_iphone = false;
  39  
  40  if ( isset($_SERVER['HTTP_USER_AGENT']) ) {
  41      if ( strpos($_SERVER['HTTP_USER_AGENT'], 'Lynx') !== false ) {
  42          $is_lynx = true;
  43      } elseif ( strpos(strtolower($_SERVER['HTTP_USER_AGENT']), 'chrome') !== false ) {
  44          $is_chrome = true;
  45      } elseif ( strpos(strtolower($_SERVER['HTTP_USER_AGENT']), 'safari') !== false ) {
  46          $is_safari = true;
  47      } elseif ( strpos($_SERVER['HTTP_USER_AGENT'], 'Gecko') !== false ) {
  48          $is_gecko = true;
  49      } elseif ( strpos($_SERVER['HTTP_USER_AGENT'], 'MSIE') !== false && strpos($_SERVER['HTTP_USER_AGENT'], 'Win') !== false ) {
  50          $is_winIE = true;
  51      } elseif ( strpos($_SERVER['HTTP_USER_AGENT'], 'MSIE') !== false && strpos($_SERVER['HTTP_USER_AGENT'], 'Mac') !== false ) {
  52          $is_macIE = true;
  53      } elseif ( strpos($_SERVER['HTTP_USER_AGENT'], 'Opera') !== false ) {
  54          $is_opera = true;
  55      } elseif ( strpos($_SERVER['HTTP_USER_AGENT'], 'Nav') !== false && strpos($_SERVER['HTTP_USER_AGENT'], 'Mozilla/4.') !== false ) {
  56          $is_NS4 = true;
  57      }
  58  }
  59  
  60  if ( $is_safari && strpos(strtolower($_SERVER['HTTP_USER_AGENT']), 'mobile') !== false )
  61      $is_iphone = true;
  62  
  63  $is_IE = ( $is_macIE || $is_winIE );
  64  
  65  // Server detection
  66  
  67  /**
  68   * Whether the server software is Apache or something else
  69   * @global bool $is_apache
  70   */
  71  $is_apache = (strpos($_SERVER['SERVER_SOFTWARE'], 'Apache') !== false || strpos($_SERVER['SERVER_SOFTWARE'], 'LiteSpeed') !== false);
  72  
  73  /**
  74   * Whether the server software is IIS or something else
  75   * @global bool $is_IIS
  76   */
  77  $is_IIS = (strpos($_SERVER['SERVER_SOFTWARE'], 'Microsoft-IIS') !== false || strpos($_SERVER['SERVER_SOFTWARE'], 'ExpressionDevServer') !== false);
  78  
  79  /**
  80   * Whether the server software is IIS 7.X
  81   * @global bool $is_iis7
  82   */
  83  $is_iis7 = (strpos($_SERVER['SERVER_SOFTWARE'], 'Microsoft-IIS/7.') !== false);
  84  
  85  
  86  ?>