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   1  <?php
   2  /**
   3   * Creates common globals for the rest of WordPress
   4   *
   5   * Sets $pagenow global which is the current page. Checks
   6   * for the browser to set which one is currently being used.
   7   *
   8   * Detects which user environment WordPress is being used on.
   9   * Only attempts to check for Apache and IIS. Two web servers
  10   * with known permalink capability.
  11   *
  12   * @package WordPress
  13   */
  14  
  15  // On which page are we ?
  16  if ( is_admin() ) {
  17      // wp-admin pages are checked more carefully
  18      if ( is_network_admin() )
  19          preg_match('#/wp-admin/network/?(.*?)$#i', $PHP_SELF, $self_matches);
  20      elseif ( is_user_admin() )
  21          preg_match('#/wp-admin/user/?(.*?)$#i', $PHP_SELF, $self_matches);
  22      else
  23          preg_match('#/wp-admin/?(.*?)$#i', $PHP_SELF, $self_matches);
  24      $pagenow = $self_matches[1];
  25      $pagenow = trim($pagenow, '/');
  26      $pagenow = preg_replace('#\?.*?$#', '', $pagenow);
  27      if ( '' === $pagenow || 'index' === $pagenow || 'index.php' === $pagenow ) {
  28          $pagenow = 'index.php';
  29      } else {
  30          preg_match('#(.*?)(/|$)#', $pagenow, $self_matches);
  31          $pagenow = strtolower($self_matches[1]);
  32          if ( '.php' !== substr($pagenow, -4, 4) )
  33              $pagenow .= '.php'; // for Options +Multiviews: /wp-admin/themes/index.php (themes.php is queried)
  34      }
  35  } else {
  36      if ( preg_match('#([^/]+\.php)([?/].*?)?$#i', $PHP_SELF, $self_matches) )
  37          $pagenow = strtolower($self_matches[1]);
  38      else
  39          $pagenow = 'index.php';
  40  }
  41  unset($self_matches);
  42  
  43  // Simple browser detection
  44  $is_lynx = $is_gecko = $is_winIE = $is_macIE = $is_opera = $is_NS4 = $is_safari = $is_chrome = $is_iphone = false;
  45  
  46  if ( isset($_SERVER['HTTP_USER_AGENT']) ) {
  47      if ( strpos($_SERVER['HTTP_USER_AGENT'], 'Lynx') !== false ) {
  48          $is_lynx = true;
  49      } elseif ( stripos($_SERVER['HTTP_USER_AGENT'], 'chrome') !== false ) {
  50          if ( stripos( $_SERVER['HTTP_USER_AGENT'], 'chromeframe' ) !== false ) {
  51              if ( $is_chrome = apply_filters( 'use_google_chrome_frame', is_admin() ) )
  52                  header( 'X-UA-Compatible: chrome=1' );
  53              $is_winIE = ! $is_chrome;
  54          } else {
  55              $is_chrome = true;
  56          }
  57      } elseif ( stripos($_SERVER['HTTP_USER_AGENT'], 'safari') !== false ) {
  58          $is_safari = true;
  59      } elseif ( strpos($_SERVER['HTTP_USER_AGENT'], 'Gecko') !== false ) {
  60          $is_gecko = true;
  61      } elseif ( strpos($_SERVER['HTTP_USER_AGENT'], 'MSIE') !== false && strpos($_SERVER['HTTP_USER_AGENT'], 'Win') !== false ) {
  62          $is_winIE = true;
  63      } elseif ( strpos($_SERVER['HTTP_USER_AGENT'], 'MSIE') !== false && strpos($_SERVER['HTTP_USER_AGENT'], 'Mac') !== false ) {
  64          $is_macIE = true;
  65      } elseif ( strpos($_SERVER['HTTP_USER_AGENT'], 'Opera') !== false ) {
  66          $is_opera = true;
  67      } elseif ( strpos($_SERVER['HTTP_USER_AGENT'], 'Nav') !== false && strpos($_SERVER['HTTP_USER_AGENT'], 'Mozilla/4.') !== false ) {
  68          $is_NS4 = true;
  69      }
  70  }
  71  
  72  if ( $is_safari && stripos($_SERVER['HTTP_USER_AGENT'], 'mobile') !== false )
  73      $is_iphone = true;
  74  
  75  $is_IE = ( $is_macIE || $is_winIE );
  76  
  77  // Server detection
  78  
  79  /**
  80   * Whether the server software is Apache or something else
  81   * @global bool $is_apache
  82   */
  83  $is_apache = (strpos($_SERVER['SERVER_SOFTWARE'], 'Apache') !== false || strpos($_SERVER['SERVER_SOFTWARE'], 'LiteSpeed') !== false);
  84  
  85  /**
  86   * Whether the server software is IIS or something else
  87   * @global bool $is_IIS
  88   */
  89  $is_IIS = !$is_apache && (strpos($_SERVER['SERVER_SOFTWARE'], 'Microsoft-IIS') !== false || strpos($_SERVER['SERVER_SOFTWARE'], 'ExpressionDevServer') !== false);
  90  
  91  /**
  92   * Whether the server software is IIS 7.X
  93   * @global bool $is_iis7
  94   */
  95  $is_iis7 = $is_IIS && (strpos($_SERVER['SERVER_SOFTWARE'], 'Microsoft-IIS/7.') !== false);
  96  
  97  ?>