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   1  <?php
   2  /**
   3   * Network installation administration panel.
   4   *
   5   * A multi-step process allowing the user to enable a network of WordPress sites.
   6   *
   7   * @since 3.0.0
   8   *
   9   * @package WordPress
  10   * @subpackage Administration
  11   */
  12  
  13  define( 'WP_NETWORK_ADMIN_PAGE', true );
  14  
  15  /** WordPress Administration Bootstrap */
  16  require_once ( './admin.php' );
  17  
  18  if ( ! is_super_admin() )
  19      wp_die( __( 'You do not have sufficient permissions to manage options for this site.' ) );
  20  
  21  if ( is_multisite() ) {
  22      if ( ! is_network_admin() ) {
  23          wp_redirect( network_admin_url( 'setup.php' ) );
  24          exit;
  25      }
  26      if ( ! defined( 'MULTISITE' ) )
  27          wp_die( __( 'The Network creation panel is not for WordPress MU networks.' ) );
  28  }
  29  
  30  // We need to create references to ms global tables to enable Network.
  31  foreach ( $wpdb->tables( 'ms_global' ) as $table => $prefixed_table )
  32      $wpdb->$table = $prefixed_table;
  33  
  34  /**
  35   * Check for an existing network.
  36   *
  37   * @since 3.0.0
  38   * @return Whether a network exists.
  39   */
  40  function network_domain_check() {
  41      global $wpdb;
  42      if ( $wpdb->get_var( "SHOW TABLES LIKE '$wpdb->site'" ) )
  43          return $wpdb->get_var( "SELECT domain FROM $wpdb->site ORDER BY id ASC LIMIT 1" );
  44      return false;
  45  }
  46  
  47  /**
  48   * Allow subdomain install
  49   *
  50   * @since 3.0.0
  51   * @return bool Whether subdomain install is allowed
  52   */
  53  function allow_subdomain_install() {
  54      $domain = preg_replace( '|https?://([^/]+)|', '$1', get_option( 'siteurl' ) );
  55      if( false !== strpos( $domain, '/' ) || 'localhost' == $domain || preg_match( '|[0-9]+\.[0-9]+\.[0-9]+\.[0-9]+|', $domain ) )
  56          return false;
  57  
  58      return true;
  59  }
  60  /**
  61   * Allow subdirectory install
  62   *
  63   * @since 3.0.0
  64   * @return bool Whether subdirectory install is allowed
  65   */
  66  function allow_subdirectory_install() {
  67      global $wpdb;
  68      if ( apply_filters( 'allow_subdirectory_install', false ) )
  69          return true;
  70  
  71      if ( defined( 'ALLOW_SUBDIRECTORY_INSTALL' ) && ALLOW_SUBDIRECTORY_INSTALL )
  72          return true;
  73  
  74      $post = $wpdb->get_row( "SELECT ID FROM $wpdb->posts WHERE post_date < DATE_SUB(NOW(), INTERVAL 1 MONTH) AND post_status = 'publish'" );
  75      if ( empty( $post ) )
  76          return true;
  77  
  78      return false;
  79  }
  80  /**
  81   * Get base domain of network.
  82   *
  83   * @since 3.0.0
  84   * @return string Base domain.
  85   */
  86  function get_clean_basedomain() {
  87      if ( $existing_domain = network_domain_check() )
  88          return $existing_domain;
  89      $domain = preg_replace( '|https?://|', '', get_option( 'siteurl' ) );
  90      if ( $slash = strpos( $domain, '/' ) )
  91          $domain = substr( $domain, 0, $slash );
  92      return $domain;
  93  }
  94  
  95  if ( ! network_domain_check() && ( ! defined( 'WP_ALLOW_MULTISITE' ) || ! WP_ALLOW_MULTISITE ) )
  96      wp_die( __( 'You must define the <code>WP_ALLOW_MULTISITE</code> constant as true in your wp-config.php file to allow creation of a Network.' ) );
  97  
  98  if ( is_network_admin() ) {
  99      $title = __( 'Network Setup' );
 100      $parent_file = 'settings.php';
 101  } else {
 102      $title = __( 'Create a Network of WordPress Sites' );
 103      $parent_file = 'tools.php';
 104  }
 105  
 106  add_contextual_help($current_screen,
 107      '<p>' . __('This screen allows you to configure a network as having subdomains (<code>site1.example.com</code>) or subdirectories (<code>example.com/site1</code>). Subdomains require wildcard subdomains to be enabled in Apache and DNS records, if your host allows it.') . '</p>' .
 108      '<p>' . __('Choose subdomains or subdirectories; this can only be switched afterwards by reconfiguring your install. Fill out the network details, and click install. If this does not work, you may have to add a wildcard DNS record (for subdomains) or change to another setting in Permalinks (for subdirectories).') . '</p>' .
 109      '<p>' . __('The next screen for Network will give you individually-generated lines of code to add to your wp-config.php and .htaccess files. Make sure the settings of your FTP client make files starting with a dot visible, so that you can find .htaccess; you may have to create this file if it really is not there. Make backup copies of those two files.') . '</p>' .
 110      '<p>' . __('Add a <code>blogs.dir</code> directory under <code>/wp-content</code> and add the designated lines of code to wp-config.php (just before <code>/*...stop editing...*/</code>) and <code>.htaccess</code> (replacing the existing WordPress rules).') . '</p>' .
 111      '<p>' . __('Once you add this code and refresh your browser, multisite should be enabled. This screen will keep an archive of the added code. You can toggle between Network Admin and Site Admin by clicking on the Howdy (Username) dropdown in the upper right of the administration area.') . '</p>' .
 112      '<p>' . __('The choice of subdirectory sites is disabled if this setup is more than a month old because of permalink problems with &#8220;/blog/&#8221; from the main site. This disabling will be addressed soon in a future version.') . '</p>' .
 113      '<p><strong>' . __('For more information:') . '</strong></p>' .
 114      '<p>' . __('<a href="http://codex.wordpress.org/Create_A_Network" target="_blank">Documentation on Creating a Network</a>') . '</p>' .
 115      '<p>' . __('<a href="http://codex.wordpress.org/Tools_Network_Screen" target="_blank">Documentation on the Network Screen</a>') . '</p>' .
 116      '<p>' . __('<a href="http://wordpress.org/support/" target="_blank">Support Forums</a>') . '</p>'
 117  );
 118  
 119  include ( ABSPATH . 'wp-admin/admin-header.php' );
 120  ?>
 121  <div class="wrap">
 122  <?php screen_icon('tools'); ?>
 123  <h2><?php echo esc_html( $title ); ?></h2>
 124  
 125  <?php
 126  /**
 127   * Prints step 1 for Network installation process.
 128   *
 129   * @todo Realistically, step 1 should be a welcome screen explaining what a Network is and such. Navigating to Tools > Network
 130   *     should not be a sudden "Welcome to a new install process! Fill this out and click here." See also contextual help todo.
 131   *
 132   * @since 3.0.0
 133   */
 134  function network_step1( $errors = false ) {
 135      global $is_apache;
 136  
 137      if ( get_option( 'siteurl' ) != get_option( 'home' ) ) {
 138          echo '<div class="error"><p><strong>' . __('Error:') . '</strong> ' . sprintf( __( 'Your <strong>WordPress address</strong> must match your <strong>Site address</strong> before creating a Network. See <a href="%s">General Settings</a>.' ), esc_url( admin_url( 'options-general.php' ) ) ) . '</p></div>';
 139          echo '</div>';
 140          include  ( ABSPATH . 'wp-admin/admin-footer.php' );
 141          die();
 142      }
 143  
 144      if ( defined('DO_NOT_UPGRADE_GLOBAL_TABLES') ) {
 145          echo '<div class="error"><p><strong>' . __('Error:') . '</strong> ' . __( 'The constant DO_NOT_UPGRADE_GLOBAL_TABLES cannot be defined when creating a network.' ) . '</p></div>';
 146          echo '</div>';
 147          include  ( ABSPATH . 'wp-admin/admin-footer.php' );
 148          die();
 149      }
 150  
 151      $active_plugins = get_option( 'active_plugins' );
 152      if ( ! empty( $active_plugins ) ) {
 153          echo '<div class="updated"><p><strong>' . __('Warning:') . '</strong> ' . sprintf( __( 'Please <a href="%s">deactivate your plugins</a> before enabling the Network feature.' ), admin_url( 'plugins.php?plugin_status=active' ) ) . '</p></div><p>' . __( 'Once the network is created, you may reactivate your plugins.' ) . '</p>';
 154          echo '</div>';
 155          include ( ABSPATH . 'wp-admin/admin-footer.php' );
 156          die();
 157      }
 158  
 159      $hostname = get_clean_basedomain();
 160      $has_ports = strstr( $hostname, ':' );
 161      if ( ( false !== $has_ports && ! in_array( $has_ports, array( ':80', ':443' ) ) ) ) {
 162          echo '<div class="error"><p><strong>' . __( 'Error:') . '</strong> ' . __( 'You cannot install a network of sites with your server address.' ) . '</p></div>';
 163          echo '<p>' . sprintf( __( 'You cannot use port numbers such as <code>%s</code>.' ), $has_ports ) . '</p>';
 164          echo '<a href="' . esc_url( admin_url() ) . '">' . __( 'Return to Dashboard' ) . '</a>';
 165          echo '</div>';
 166          include ( ABSPATH . 'wp-admin/admin-footer.php' );
 167          die();
 168      }
 169  
 170      echo '<form method="post" action="">';
 171  
 172      wp_nonce_field( 'install-network-1' );
 173  
 174      $error_codes = array();
 175      if ( is_wp_error( $errors ) ) {
 176          echo '<div class="error"><p><strong>' . __( 'ERROR: The network could not be created.' ) . '</strong></p>';
 177          foreach ( $errors->get_error_messages() as $error )
 178              echo "<p>$error</p>";
 179          echo '</div>';
 180          $error_codes = $errors->get_error_codes();
 181      }
 182  
 183      if ( WP_CONTENT_DIR != ABSPATH . 'wp-content' )
 184          echo '<div class="error"><p><strong>' . __('Warning!') . '</strong> ' . __( 'Networks may not be fully compatible with custom wp-content directories.' ) . '</p></div>';
 185  
 186      $site_name = ( ! empty( $_POST['sitename'] ) && ! in_array( 'empty_sitename', $error_codes ) ) ? $_POST['sitename'] : sprintf( _x('%s Sites', 'Default network name' ), get_option( 'blogname' ) );
 187      $admin_email = ( ! empty( $_POST['email'] ) && ! in_array( 'invalid_email', $error_codes ) ) ? $_POST['email'] : get_option( 'admin_email' );
 188      ?>
 189      <p><?php _e( 'Welcome to the Network installation process!' ); ?></p>
 190      <p><?php _e( 'Fill in the information below and you&#8217;ll be on your way to creating a network of WordPress sites. We will create configuration files in the next step.' ); ?></p>
 191      <?php
 192  
 193      if ( isset( $_POST['subdomain_install'] ) ) {
 194          $subdomain_install = (bool) $_POST['subdomain_install'];
 195      } elseif ( apache_mod_loaded('mod_rewrite') ) { // assume nothing
 196          $subdomain_install = true;
 197      } elseif ( !allow_subdirectory_install() ) {
 198          $subdomain_install = true;
 199      } else {
 200          $subdomain_install = false;
 201          if ( $got_mod_rewrite = got_mod_rewrite() ) // dangerous assumptions
 202              echo '<div class="updated inline"><p><strong>' . __( 'Note:' ) . '</strong> ' . __( 'Please make sure the Apache <code>mod_rewrite</code> module is installed as it will be used at the end of this installation.' ) . '</p>';
 203          elseif ( $is_apache )
 204              echo '<div class="error inline"><p><strong>' . __( 'Warning!' ) . '</strong> ' . __( 'It looks like the Apache <code>mod_rewrite</code> module is not installed.' ) . '</p>';
 205          if ( $got_mod_rewrite || $is_apache ) // Protect against mod_rewrite mimicry (but ! Apache)
 206              echo '<p>' . __( 'If <code>mod_rewrite</code> is disabled, ask your administrator to enable that module, or look at the <a href="http://httpd.apache.org/docs/mod/mod_rewrite.html">Apache documentation</a> or <a href="http://www.google.com/search?q=apache+mod_rewrite">elsewhere</a> for help setting it up.' ) . '</p></div>';
 207      }
 208  
 209      if ( allow_subdomain_install() && allow_subdirectory_install() ) : ?>
 210          <h3><?php esc_html_e( 'Addresses of Sites in your Network' ); ?></h3>
 211          <p><?php _e( 'Please choose whether you would like sites in your WordPress network to use sub-domains or sub-directories. <strong>You cannot change this later.</strong>' ); ?></p>
 212          <p><?php _e( 'You will need a wildcard DNS record if you are going to use the virtual host (sub-domain) functionality.' ); ?></p>
 213          <?php // @todo: Link to an MS readme? ?>
 214          <table class="form-table">
 215              <tr>
 216                  <th><label><input type='radio' name='subdomain_install' value='1'<?php checked( $subdomain_install ); ?> /> <?php _e( 'Sub-domains' ); ?></label></th>
 217                  <td><?php printf( _x( 'like <code>site1.%1$s</code> and <code>site2.%1$s</code>', 'subdomain examples' ), $hostname ); ?></td>
 218              </tr>
 219              <tr>
 220                  <th><label><input type='radio' name='subdomain_install' value='0'<?php checked( ! $subdomain_install ); ?> /> <?php _e( 'Sub-directories' ); ?></label></th>
 221                  <td><?php printf( _x( 'like <code>%1$s/site1</code> and <code>%1$s/site2</code>', 'subdirectory examples' ), $hostname ); ?></td>
 222              </tr>
 223          </table>
 224  
 225  <?php
 226      endif;
 227  
 228          $is_www = ( 0 === strpos( $hostname, 'www.' ) );
 229          if ( $is_www ) :
 230          ?>
 231          <h3><?php esc_html_e( 'Server Address' ); ?></h3>
 232          <p><?php printf( __( 'We recommend you change your siteurl to <code>%1$s</code> before enabling the network feature. It will still be possible to visit your site using the <code>www</code> prefix with an address like <code>%2$s</code> but any links will not have the <code>www</code> prefix.' ), substr( $hostname, 4 ), $hostname ); ?></h3>
 233          <table class="form-table">
 234              <tr>
 235                  <th scope='row'><?php esc_html_e( 'Server Address' ); ?></th>
 236                  <td>
 237                      <?php printf( __( 'The internet address of your network will be <code>%s</code>.' ), $hostname ); ?>
 238                  </td>
 239              </tr>
 240          </table>
 241          <?php endif; ?>
 242  
 243          <h3><?php esc_html_e( 'Network Details' ); ?></h3>
 244          <table class="form-table">
 245          <?php if ( 'localhost' == $hostname ) : ?>
 246              <tr>
 247                  <th scope="row"><?php esc_html_e( 'Sub-directory Install' ); ?></th>
 248                  <td><?php
 249                      _e( 'Because you are using <code>localhost</code>, the sites in your WordPress network must use sub-directories. Consider using <code>localhost.localdomain</code> if you wish to use sub-domains.' );
 250                      // Uh oh:
 251                      if ( !allow_subdirectory_install() )
 252                          echo ' <strong>' . __( 'Warning!' ) . ' ' . __( 'The main site in a sub-directory install will need to use a modified permalink structure, potentially breaking existing links.' ) . '</strong>';
 253                  ?></td>
 254              </tr>
 255          <?php elseif ( !allow_subdomain_install() ) : ?>
 256              <tr>
 257                  <th scope="row"><?php esc_html_e( 'Sub-directory Install' ); ?></th>
 258                  <td><?php
 259                      _e( 'Because your install is in a directory, the sites in your WordPress network must use sub-directories.' );
 260                      // Uh oh:
 261                      if ( !allow_subdirectory_install() )
 262                          echo ' <strong>' . __( 'Warning!' ) . ' ' . __( 'The main site in a sub-directory install will need to use a modified permalink structure, potentially breaking existing links.' ) . '</strong>';
 263                  ?></td>
 264              </tr>
 265          <?php elseif ( !allow_subdirectory_install() ) : ?>
 266              <tr>
 267                  <th scope="row"><?php esc_html_e( 'Sub-domain Install' ); ?></th>
 268                  <td><?php _e( 'Because your install is not new, the sites in your WordPress network must use sub-domains.' );
 269                      echo ' <strong>' . __( 'The main site in a sub-directory install will need to use a modified permalink structure, potentially breaking existing links.' ) . '</strong>';
 270                  ?></td>
 271              </tr>
 272          <?php endif; ?>
 273          <?php if ( ! $is_www ) : ?>
 274              <tr>
 275                  <th scope='row'><?php esc_html_e( 'Server Address' ); ?></th>
 276                  <td>
 277                      <?php printf( __( 'The internet address of your network will be <code>%s</code>.' ), $hostname ); ?>
 278                  </td>
 279              </tr>
 280          <?php endif; ?>
 281              <tr>
 282                  <th scope='row'><?php esc_html_e( 'Network Title' ); ?></th>
 283                  <td>
 284                      <input name='sitename' type='text' size='45' value='<?php echo esc_attr( $site_name ); ?>' />
 285                      <br /><?php _e( 'What would you like to call your network?' ); ?>
 286                  </td>
 287              </tr>
 288              <tr>
 289                  <th scope='row'><?php esc_html_e( 'Admin E-mail Address' ); ?></th>
 290                  <td>
 291                      <input name='email' type='text' size='45' value='<?php echo esc_attr( $admin_email ); ?>' />
 292                      <br /><?php _e( 'Your email address.' ); ?>
 293                  </td>
 294              </tr>
 295          </table>
 296          <?php submit_button( __( 'Install' ), 'primary', 'submit' ); ?>
 297      </form>
 298      <?php
 299  }
 300  
 301  /**
 302   * Prints step 2 for Network installation process.
 303   *
 304   * @since 3.0.0
 305   */
 306  function network_step2( $errors = false ) {
 307      global $base, $wpdb;
 308      $hostname = get_clean_basedomain();
 309  
 310      if ( ! isset( $base ) )
 311          $base = trailingslashit( stripslashes( dirname( dirname( $_SERVER['SCRIPT_NAME'] ) ) ) );
 312  
 313      // Wildcard DNS message.
 314      if ( is_wp_error( $errors ) )
 315          echo '<div class="error">' . $errors->get_error_message() . '</div>';
 316  
 317      if ( $_POST ) {
 318          if ( allow_subdomain_install() )
 319              $subdomain_install = allow_subdirectory_install() ? ! empty( $_POST['subdomain_install'] ) : true;
 320          else
 321              $subdomain_install = false;
 322      } else {
 323          if ( is_multisite() ) {
 324              $subdomain_install = is_subdomain_install();
 325  ?>
 326      <p><?php _e( 'The original configuration steps are shown here for reference.' ); ?></p>
 327  <?php
 328          } else {
 329              $subdomain_install = (bool) $wpdb->get_var( "SELECT meta_value FROM $wpdb->sitemeta WHERE site_id = 1 AND meta_key = 'subdomain_install'" );
 330  ?>
 331      <div class="error"><p><strong><?php _e('Warning:'); ?></strong> <?php _e( 'An existing WordPress network was detected.' ); ?></p></div>
 332      <p><?php _e( 'Please complete the configuration steps. To create a new network, you will need to empty or remove the network database tables.' ); ?></p>
 333  <?php
 334          }
 335      }
 336  
 337      if ( $_POST || ! is_multisite() ) {
 338  ?>
 339          <h3><?php esc_html_e( 'Enabling the Network' ); ?></h3>
 340          <p><?php _e( 'Complete the following steps to enable the features for creating a network of sites.' ); ?></p>
 341          <div class="updated inline"><p><?php
 342              if ( file_exists( ABSPATH . '.htaccess' ) )
 343                  printf( __( '<strong>Caution:</strong> We recommend you back up your existing <code>wp-config.php</code> and <code>%s</code> files.' ), '.htaccess' );
 344              elseif ( file_exists( ABSPATH . 'web.config' ) )
 345                  printf( __( '<strong>Caution:</strong> We recommend you back up your existing <code>wp-config.php</code> and <code>%s</code> files.' ), 'web.config' );
 346              else
 347                  _e( '<strong>Caution:</strong> We recommend you back up your existing <code>wp-config.php</code> file.' );
 348          ?></p></div>
 349  <?php
 350      }
 351  ?>
 352          <ol>
 353              <li><p><?php
 354                  printf( __( 'Create a <code>blogs.dir</code> directory at <code>%s/blogs.dir</code>. This directory is used to store uploaded media for your additional sites and must be writeable by the web server.' ), WP_CONTENT_DIR );
 355                  if ( WP_CONTENT_DIR != ABSPATH . 'wp-content' )
 356                      echo ' <strong>' . __('Warning:') . ' ' . __( 'Networks may not be fully compatible with custom wp-content directories.' ) . '</strong';
 357              ?></p></li>
 358              <li><p><?php printf( __( 'Add the following to your <code>wp-config.php</code> file in <code>%s</code> <strong>above</strong> the line reading <code>/* That&#8217;s all, stop editing! Happy blogging. */</code>:' ), ABSPATH ); ?></p>
 359                  <textarea class="code" readonly="readonly" cols="100" rows="7">
 360  define( 'MULTISITE', true );
 361  define( 'SUBDOMAIN_INSTALL', <?php echo $subdomain_install ? 'true' : 'false'; ?> );
 362  $base = '<?php echo $base; ?>';
 363  define( 'DOMAIN_CURRENT_SITE', '<?php echo $hostname; ?>' );
 364  define( 'PATH_CURRENT_SITE', '<?php echo $base; ?>' );
 365  define( 'SITE_ID_CURRENT_SITE', 1 );
 366  define( 'BLOG_ID_CURRENT_SITE', 1 );</textarea>
 367  <?php
 368      $keys_salts = array( 'AUTH_KEY' => '', 'SECURE_AUTH_KEY' => '', 'LOGGED_IN_KEY' => '', 'NONCE_KEY' => '', 'AUTH_SALT' => '', 'SECURE_AUTH_SALT' => '', 'LOGGED_IN_SALT' => '', 'NONCE_SALT' => '' );
 369      foreach ( $keys_salts as $c => $v ) {
 370          if ( defined( $c ) )
 371              unset( $keys_salts[ $c ] );
 372      }
 373      if ( ! empty( $keys_salts ) ) {
 374          $keys_salts_str = '';
 375          $from_api = wp_remote_get( 'https://api.wordpress.org/secret-key/1.1/salt/' );
 376          if ( is_wp_error( $from_api ) ) {
 377              foreach ( $keys_salts as $c => $v ) {
 378                  $keys_salts_str .= "\ndefine( '$c', '" . wp_generate_password( 64, true, true ) . "' );";
 379              }
 380          } else {
 381              $from_api = explode( "\n", wp_remote_retrieve_body( $from_api ) );
 382              foreach ( $keys_salts as $c => $v ) {
 383                  $keys_salts_str .= "\ndefine( '$c', '" . substr( array_shift( $from_api ), 28, 64 ) . "' );";
 384              }
 385          }
 386          $num_keys_salts = count( $keys_salts );
 387  ?>
 388      <p><?php
 389          echo _n( 'This unique authentication key is also missing from your <code>wp-config.php</code> file.', 'These unique authentication keys are also missing from your <code>wp-config.php</code> file.', $num_keys_salts ); ?> <?php _e( 'To make your installation more secure, you should also add:' ) ?></p>
 390      <textarea class="code" readonly="readonly" cols="100" rows="<?php echo $num_keys_salts; ?>"><?php echo esc_textarea( $keys_salts_str ); ?></textarea>
 391  <?php
 392      }
 393  ?>
 394  </li>
 395  <?php
 396      if ( iis7_supports_permalinks() ) :
 397  
 398              if ( $subdomain_install ) {
 399                  $web_config_file =
 400  '<?xml version="1.0" encoding="UTF-8"?>
 401  <configuration>
 402      <system.webServer>
 403          <rewrite>
 404              <rules>
 405                  <rule name="WordPress Rule 1" stopProcessing="true">
 406                      <match url="^index\.php$" ignoreCase="false" />
 407                      <action type="None" />
 408                  </rule>
 409                  <rule name="WordPress Rule 2" stopProcessing="true">
 410                      <match url="^files/(.+)" ignoreCase="false" />
 411                      <action type="Rewrite" url="wp-includes/ms-files.php?file={R:1}" appendQueryString="false" />
 412                  </rule>
 413                  <rule name="WordPress Rule 3" stopProcessing="true">
 414                      <match url="^" ignoreCase="false" />
 415                      <conditions logicalGrouping="MatchAny">
 416                          <add input="{REQUEST_FILENAME}" matchType="IsFile" ignoreCase="false" />
 417                          <add input="{REQUEST_FILENAME}" matchType="IsDirectory" ignoreCase="false" />
 418                      </conditions>
 419                      <action type="None" />
 420                  </rule>
 421                  <rule name="WordPress Rule 4" stopProcessing="true">
 422                      <match url="." ignoreCase="false" />
 423                      <action type="Rewrite" url="index.php" />
 424                  </rule>
 425              </rules>
 426          </rewrite>
 427      </system.webServer>
 428  </configuration>';
 429              } else {
 430                  $web_config_file =
 431  '<?xml version="1.0" encoding="UTF-8"?>
 432  <configuration>
 433      <system.webServer>
 434          <rewrite>
 435              <rules>
 436                  <rule name="WordPress Rule 1" stopProcessing="true">
 437                      <match url="^index\.php$" ignoreCase="false" />
 438                      <action type="None" />
 439                  </rule>
 440                  <rule name="WordPress Rule 2" stopProcessing="true">
 441                      <match url="^([_0-9a-zA-Z-]+/)?files/(.+)" ignoreCase="false" />
 442                      <action type="Rewrite" url="wp-includes/ms-files.php?file={R:2}" appendQueryString="false" />
 443                  </rule>
 444                  <rule name="WordPress Rule 3" stopProcessing="true">
 445                      <match url="^([_0-9a-zA-Z-]+/)?wp-admin$" ignoreCase="false" />
 446                      <action type="Redirect" url="{R:1}wp-admin/" redirectType="Permanent" />
 447                  </rule>
 448                  <rule name="WordPress Rule 4" stopProcessing="true">
 449                      <match url="^" ignoreCase="false" />
 450                      <conditions logicalGrouping="MatchAny">
 451                          <add input="{REQUEST_FILENAME}" matchType="IsFile" ignoreCase="false" />
 452                          <add input="{REQUEST_FILENAME}" matchType="IsDirectory" ignoreCase="false" />
 453                      </conditions>
 454                      <action type="None" />
 455                  </rule>
 456                  <rule name="WordPress Rule 5" stopProcessing="true">
 457                      <match url="^[_0-9a-zA-Z-]+/(wp-(content|admin|includes).*)" ignoreCase="false" />
 458                      <action type="Rewrite" url="{R:2}" />
 459                  </rule>
 460                  <rule name="WordPress Rule 6" stopProcessing="true">
 461                      <match url="^([_0-9a-zA-Z-]+/)?(.*\.php)$" ignoreCase="false" />
 462                      <action type="Rewrite" url="{R:2}" />
 463                  </rule>
 464                  <rule name="WordPress Rule 7" stopProcessing="true">
 465                      <match url="." ignoreCase="false" />
 466                      <action type="Rewrite" url="index.php" />
 467                  </rule>
 468              </rules>
 469          </rewrite>
 470      </system.webServer>
 471  </configuration>';
 472              }
 473      ?>
 474          <li><p><?php printf( __( 'Add the following to your <code>web.config</code> file in <code>%s</code>, replacing other WordPress rules:' ), ABSPATH ); ?></p>
 475          <textarea class="code" readonly="readonly" cols="100" rows="20">
 476          <?php echo esc_textarea( $web_config_file ); ?>
 477          </textarea></li>
 478          </ol>
 479  
 480      <?php else : // end iis7_supports_permalinks(). construct an htaccess file instead:
 481  
 482          $htaccess_file = 'RewriteEngine On
 483  RewriteBase ' . $base . '
 484  RewriteRule ^index\.php$ - [L]
 485  
 486  # uploaded files
 487  RewriteRule ^' . ( $subdomain_install ? '' : '([_0-9a-zA-Z-]+/)?' ) . 'files/(.+) wp-includes/ms-files.php?file=$' . ( $subdomain_install ? 1 : 2 ) . ' [L]' . "\n";
 488  
 489          if ( ! $subdomain_install )
 490              $htaccess_file .= "\n# add a trailing slash to /wp-admin\n" . 'RewriteRule ^([_0-9a-zA-Z-]+/)?wp-admin$ $1wp-admin/ [R=301,L]' . "\n";
 491  
 492          $htaccess_file .= "\n" . 'RewriteCond %{REQUEST_FILENAME} -f [OR]
 493  RewriteCond %{REQUEST_FILENAME} -d
 494  RewriteRule ^ - [L]';
 495  
 496          // @todo custom content dir.
 497          if ( ! $subdomain_install )
 498              $htaccess_file .= "\nRewriteRule  ^[_0-9a-zA-Z-]+/(wp-(content|admin|includes).*) $1 [L]\nRewriteRule  ^[_0-9a-zA-Z-]+/(.*\.php)$ $1 [L]";
 499  
 500          $htaccess_file .= "\nRewriteRule . index.php [L]";
 501  
 502          ?>
 503          <li><p><?php printf( __( 'Add the following to your <code>.htaccess</code> file in <code>%s</code>, replacing other WordPress rules:' ), ABSPATH ); ?></p>
 504          <textarea class="code" readonly="readonly" cols="100" rows="<?php echo $subdomain_install ? 11 : 16; ?>">
 505  <?php echo esc_textarea( $htaccess_file ); ?></textarea></li>
 506          </ol>
 507  
 508      <?php endif; // end IIS/Apache code branches.
 509  
 510      if ( !is_multisite() ) { ?>
 511          <p><?php printf( __( 'Once you complete these steps, your network is enabled and configured. You will have to log in again.') ); ?> <a href="<?php echo esc_url( site_url( 'wp-login.php' ) ); ?>"><?php _e( 'Log In' ); ?></a></p>
 512  <?php
 513      }
 514  }
 515  
 516  if ( $_POST ) {
 517  
 518      $base = trailingslashit( stripslashes( dirname( dirname( $_SERVER['SCRIPT_NAME'] ) ) ) );
 519  
 520      check_admin_referer( 'install-network-1' );
 521  
 522      require_once ( ABSPATH . 'wp-admin/includes/upgrade.php' );
 523      // create network tables
 524      install_network();
 525      $hostname = get_clean_basedomain();
 526      $subdomain_install = !allow_subdomain_install() ? false : (bool) $_POST['subdomain_install'];
 527      if ( ! network_domain_check() ) {
 528          $result = populate_network( 1, get_clean_basedomain(), sanitize_email( $_POST['email'] ), stripslashes( $_POST['sitename'] ), $base, $subdomain_install );
 529          if ( is_wp_error( $result ) ) {
 530              if ( 1 == count( $result->get_error_codes() ) && 'no_wildcard_dns' == $result->get_error_code() )
 531                  network_step2( $result );
 532              else
 533                  network_step1( $result );
 534          } else {
 535              network_step2();
 536          }
 537      } else {
 538          network_step2();
 539      }
 540  } elseif ( is_multisite() || network_domain_check() ) {
 541      network_step2();
 542  } else {
 543      network_step1();
 544  }
 545  ?>
 546  </div>
 547  
 548  <?php include ( ABSPATH . 'wp-admin/admin-footer.php' ); ?>