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 

    43 	$sql = $wpdb->prepare( "SHOW TABLES LIKE %s", $wpdb->esc_like( $wpdb->site ) );

    44 	if ( $wpdb->get_var( $sql ) ) {

    45 		return $wpdb->get_var( "SELECT domain FROM $wpdb->site ORDER BY id ASC LIMIT 1" );

    46 	}

    47 	return false;

    63 /**

    64  * Allow subdirectory install.

    65  *

    66  * @since 3.0.0

    67  * @return bool Whether subdirectory install is allowed

    68  */

    69 function allow_subdirectory_install() {

    70 	global $wpdb;

    71         /**

    72          * Filter whether to enable the subdirectory install feature in Multisite.

    73          *

    74          * @since 3.0.0

    75          *

    76          * @param bool true Whether to enable the subdirectory install feature in Multisite. Default is false.

    77          */

    78 	if ( apply_filters( 'allow_subdirectory_install', false ) )

    79 		return true;

    80 

    81 	if ( defined( 'ALLOW_SUBDIRECTORY_INSTALL' ) && ALLOW_SUBDIRECTORY_INSTALL )

    82 		return true;

    83 

    84 	$post = $wpdb->get_row( "SELECT ID FROM $wpdb->posts WHERE post_date < DATE_SUB(NOW(), INTERVAL 1 MONTH) AND post_status = 'publish'" );

    85 	if ( empty( $post ) )

    86 		return true;

    87 

    88 	return false;

    89 }

    90 /**

    91  * Get base domain of network.

    92  *

    93  * @since 3.0.0

    94  * @return string Base domain.

    95  */

    96 function get_clean_basedomain() {

    97 	if ( $existing_domain = network_domain_check() )

    98 		return $existing_domain;

    99 	$domain = preg_replace( '|https?://|', '', get_option( 'siteurl' ) );

   100 	if ( $slash = strpos( $domain, '/' ) )

   101 		$domain = substr( $domain, 0, $slash );

   102 	return $domain;

   103 }

   104 

   105 if ( ! network_domain_check() && ( ! defined( 'WP_ALLOW_MULTISITE' ) || ! WP_ALLOW_MULTISITE ) )

   106 	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.' ) );

   145 /**

   146  * Prints step 1 for Network installation process.

   147  *

   148  * @todo Realistically, step 1 should be a welcome screen explaining what a Network is and such. Navigating to Tools > Network

   149  * 	should not be a sudden "Welcome to a new install process! Fill this out and click here." See also contextual help todo.

   150  *

   151  * @since 3.0.0

   152  */

   153 function network_step1( $errors = false ) {

   154 	global $is_apache;

   155 

   156 	if ( defined('DO_NOT_UPGRADE_GLOBAL_TABLES') ) {

   157 		echo '<div class="error"><p><strong>' . __('ERROR:') . '</strong> ' . __( 'The constant DO_NOT_UPGRADE_GLOBAL_TABLES cannot be defined when creating a network.' ) . '</p></div>';

   158 		echo '</div>';

   159 		include( ABSPATH . 'wp-admin/admin-footer.php' );

   160 		die();

   161 	}

   162 

   163 	$active_plugins = get_option( 'active_plugins' );

   164 	if ( ! empty( $active_plugins ) ) {

   165 		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>';

   166 		echo '</div>';

   167 		include( ABSPATH . 'wp-admin/admin-footer.php' );

   168 		die();

   169 	}

   170 

   171 	$hostname = get_clean_basedomain();

   172 	$has_ports = strstr( $hostname, ':' );

   173 	if ( ( false !== $has_ports && ! in_array( $has_ports, array( ':80', ':443' ) ) ) ) {

   174 		echo '<div class="error"><p><strong>' . __( 'ERROR:') . '</strong> ' . __( 'You cannot install a network of sites with your server address.' ) . '</p></div>';

   175 		echo '<p>' . sprintf( __( 'You cannot use port numbers such as <code>%s</code>.' ), $has_ports ) . '</p>';

   176 		echo '<a href="' . esc_url( admin_url() ) . '">' . __( 'Return to Dashboard' ) . '</a>';

   177 		echo '</div>';

   178 		include( ABSPATH . 'wp-admin/admin-footer.php' );

   179 		die();

   180 	}

   181 

   182 	echo '<form method="post">';

   183 

   184 	wp_nonce_field( 'install-network-1' );

   185 

   186 	$error_codes = array();

   187 	if ( is_wp_error( $errors ) ) {

   188 		echo '<div class="error"><p><strong>' . __( 'ERROR: The network could not be created.' ) . '</strong></p>';

   189 		foreach ( $errors->get_error_messages() as $error )

   190 			echo "<p>$error</p>";

   191 		echo '</div>';

   192 		$error_codes = $errors->get_error_codes();

   193 	}

   194 

   195 	$site_name = ( ! empty( $_POST['sitename'] ) && ! in_array( 'empty_sitename', $error_codes ) ) ? $_POST['sitename'] : sprintf( _x('%s Sites', 'Default network name' ), get_option( 'blogname' ) );

   196 	$admin_email = ( ! empty( $_POST['email'] ) && ! in_array( 'invalid_email', $error_codes ) ) ? $_POST['email'] : get_option( 'admin_email' );

   197 	?>

   198 	<p><?php _e( 'Welcome to the Network installation process!' ); ?></p>

   199 	<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>

   200 	<?php

   201 

   202 	if ( isset( $_POST['subdomain_install'] ) ) {

   203 		$subdomain_install = (bool) $_POST['subdomain_install'];

   204 	} elseif ( apache_mod_loaded('mod_rewrite') ) { // assume nothing

   205 		$subdomain_install = true;

   206 	} elseif ( !allow_subdirectory_install() ) {

   207 		$subdomain_install = true;

   208 	} else {

   209 		$subdomain_install = false;

   210 		if ( $got_mod_rewrite = got_mod_rewrite() ) // dangerous assumptions

   211 			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>';

   212 		elseif ( $is_apache )

   213 			echo '<div class="error inline"><p><strong>' . __( 'Warning!' ) . '</strong> ' . __( 'It looks like the Apache <code>mod_rewrite</code> module is not installed.' ) . '</p>';

   214 		if ( $got_mod_rewrite || $is_apache ) // Protect against mod_rewrite mimicry (but ! Apache)

   215 			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>';

   216 	}

   217 

   218 	if ( allow_subdomain_install() && allow_subdirectory_install() ) : ?>

   219 		<h3><?php esc_html_e( 'Addresses of Sites in your Network' ); ?></h3>

   220 		<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>

   221 		<p><?php _e( 'You will need a wildcard DNS record if you are going to use the virtual host (sub-domain) functionality.' ); ?></p>

   222 		<?php // @todo: Link to an MS readme? ?>

   223 		<table class="form-table">

   224 			<tr>

   225 				<th><label><input type="radio" name="subdomain_install" value="1"<?php checked( $subdomain_install ); ?> /> <?php _e( 'Sub-domains' ); ?></label></th>

   226 				<td><?php printf(

   227 					/* translators: 1: hostname */

   228 					_x( 'like <code>site1.%1$s</code> and <code>site2.%1$s</code>', 'subdomain examples' ),

   229 					$hostname

   230 				); ?></td>

   231 			</tr>

   232 			<tr>

   233 				<th><label><input type="radio" name="subdomain_install" value="0"<?php checked( ! $subdomain_install ); ?> /> <?php _e( 'Sub-directories' ); ?></label></th>

   234 				<td><?php printf(

   235 					/* translators: 1: hostname */

   236 					_x( 'like <code>%1$s/site1</code> and <code>%1$s/site2</code>', 'subdirectory examples' ),

   237 					$hostname

   238 				); ?></td>

   239 			</tr>

   240 		</table>

   241 

   242 <?php

   243 	endif;

   244 

   245 		if ( WP_CONTENT_DIR != ABSPATH . 'wp-content' && ( allow_subdirectory_install() || ! allow_subdomain_install() ) )

   246 			echo '<div class="error inline"><p><strong>' . __('Warning!') . '</strong> ' . __( 'Subdirectory networks may not be fully compatible with custom wp-content directories.' ) . '</p></div>';

   247 

   248 		$is_www = ( 0 === strpos( $hostname, 'www.' ) );

   249 		if ( $is_www ) :

   250 		?>

   251 		<h3><?php esc_html_e( 'Server Address' ); ?></h3>

   252 		<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 ); ?></p>

   253 		<table class="form-table">

   254 			<tr>

   255 				<th scope='row'><?php esc_html_e( 'Server Address' ); ?></th>

   256 				<td>

   257 					<?php printf( __( 'The internet address of your network will be <code>%s</code>.' ), $hostname ); ?>

   258 				</td>

   259 			</tr>

   260 		</table>

   261 		<?php endif; ?>

   262 

   263 		<h3><?php esc_html_e( 'Network Details' ); ?></h3>

   264 		<table class="form-table">

   265 		<?php if ( 'localhost' == $hostname ) : ?>

   266 			<tr>

   267 				<th scope="row"><?php esc_html_e( 'Sub-directory Install' ); ?></th>

   268 				<td><?php

   269 					_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.' );

   270 					// Uh oh:

   271 					if ( !allow_subdirectory_install() )

   272 						echo ' <strong>' . __( 'Warning!' ) . ' ' . __( 'The main site in a sub-directory install will need to use a modified permalink structure, potentially breaking existing links.' ) . '</strong>';

   273 				?></td>

   274 			</tr>

   275 		<?php elseif ( !allow_subdomain_install() ) : ?>

   276 			<tr>

   277 				<th scope="row"><?php esc_html_e( 'Sub-directory Install' ); ?></th>

   278 				<td><?php

   279 					_e( 'Because your install is in a directory, the sites in your WordPress network must use sub-directories.' );

   280 					// Uh oh:

   281 					if ( !allow_subdirectory_install() )

   282 						echo ' <strong>' . __( 'Warning!' ) . ' ' . __( 'The main site in a sub-directory install will need to use a modified permalink structure, potentially breaking existing links.' ) . '</strong>';

   283 				?></td>

   284 			</tr>

   285 		<?php elseif ( !allow_subdirectory_install() ) : ?>

   286 			<tr>

   287 				<th scope="row"><?php esc_html_e( 'Sub-domain Install' ); ?></th>

   288 				<td><?php _e( 'Because your install is not new, the sites in your WordPress network must use sub-domains.' );

   289 					echo ' <strong>' . __( 'The main site in a sub-directory install will need to use a modified permalink structure, potentially breaking existing links.' ) . '</strong>';

   290 				?></td>

   291 			</tr>

   292 		<?php endif; ?>

   293 		<?php if ( ! $is_www ) : ?>

   294 			<tr>

   295 				<th scope='row'><?php esc_html_e( 'Server Address' ); ?></th>

   296 				<td>

   297 					<?php printf( __( 'The internet address of your network will be <code>%s</code>.' ), $hostname ); ?>

   298 				</td>

   299 			</tr>

   300 		<?php endif; ?>

   301 			<tr>

   302 				<th scope='row'><?php esc_html_e( 'Network Title' ); ?></th>

   303 				<td>

   304 					<input name='sitename' type='text' size='45' value='<?php echo esc_attr( $site_name ); ?>' />

   305 					<p class="description">

   306 						<?php _e( 'What would you like to call your network?' ); ?>

   307 					</p>

   308 				</td>

   309 			</tr>

   310 			<tr>

   311 				<th scope='row'><?php esc_html_e( 'Network Admin Email' ); ?></th>

   312 				<td>

   313 					<input name='email' type='text' size='45' value='<?php echo esc_attr( $admin_email ); ?>' />

   314 					<p class="description">

   315 						<?php _e( 'Your email address.' ); ?>

   316 					</p>

   317 				</td>

   318 			</tr>

   319 		</table>

   320 		<?php submit_button( __( 'Install' ), 'primary', 'submit' ); ?>

   321 	</form>

   322 	<?php

   323 }

   324 

   325 /**

   326  * Prints step 2 for Network installation process.

   327  *

   328  * @since 3.0.0

   329  */

   330 function network_step2( $errors = false ) {

   331 	global $wpdb;

   332 

   333 	$hostname          = get_clean_basedomain();

   334 	$slashed_home      = trailingslashit( get_option( 'home' ) );

   335 	$base              = parse_url( $slashed_home, PHP_URL_PATH );

   336 	$document_root_fix = str_replace( '\\', '/', realpath( $_SERVER['DOCUMENT_ROOT'] ) );

   337 	$abspath_fix       = str_replace( '\\', '/', ABSPATH );

   338 	$home_path         = 0 === strpos( $abspath_fix, $document_root_fix ) ? $document_root_fix . $base : get_home_path();

   339 	$wp_siteurl_subdir = preg_replace( '#^' . preg_quote( $home_path, '#' ) . '#', '', $abspath_fix );

   340 	$rewrite_base      = ! empty( $wp_siteurl_subdir ) ? ltrim( trailingslashit( $wp_siteurl_subdir ), '/' ) : '';

   341 

   342 

   343 	$location_of_wp_config = $abspath_fix;

   344 	if ( ! file_exists( ABSPATH . 'wp-config.php' ) && file_exists( dirname( ABSPATH ) . '/wp-config.php' ) ) {

   345 		$location_of_wp_config = dirname( $abspath_fix );

   346 	}

   347 	$location_of_wp_config = trailingslashit( $location_of_wp_config );

   348 

   349 	// Wildcard DNS message.

   350 	if ( is_wp_error( $errors ) )

   351 		echo '<div class="error">' . $errors->get_error_message() . '</div>';

   352 

   353 	if ( $_POST ) {

   354 		if ( allow_subdomain_install() )

   355 			$subdomain_install = allow_subdirectory_install() ? ! empty( $_POST['subdomain_install'] ) : true;

   356 		else

   357 			$subdomain_install = false;

   358 	} else {

   359 		if ( is_multisite() ) {

   360 			$subdomain_install = is_subdomain_install();

   361 ?>

   362 	<p><?php _e( 'The original configuration steps are shown here for reference.' ); ?></p>

   363 <?php

   364 		} else {

   365 			$subdomain_install = (bool) $wpdb->get_var( "SELECT meta_value FROM $wpdb->sitemeta WHERE site_id = 1 AND meta_key = 'subdomain_install'" );

   366 ?>

   367 	<div class="error"><p><strong><?php _e('Warning:'); ?></strong> <?php _e( 'An existing WordPress network was detected.' ); ?></p></div>

   368 	<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>

   369 <?php

   370 		}

   371 	}

   372 

   373 	$subdir_match          = $subdomain_install ? '' : '([_0-9a-zA-Z-]+/)?';

   374 	$subdir_replacement_01 = $subdomain_install ? '' : '$1';

   375 	$subdir_replacement_12 = $subdomain_install ? '$1' : '$2';

   376 

   377 	if ( $_POST || ! is_multisite() ) {

   378 ?>

   379 		<h3><?php esc_html_e( 'Enabling the Network' ); ?></h3>

   380 		<p><?php _e( 'Complete the following steps to enable the features for creating a network of sites.' ); ?></p>

   381 		<div class="updated inline"><p><?php

   382 			if ( file_exists( $home_path . '.htaccess' ) )

   383 				printf( __( '<strong>Caution:</strong> We recommend you back up your existing <code>wp-config.php</code> and <code>%s</code> files.' ), '.htaccess' );

   384 			elseif ( file_exists( $home_path . 'web.config' ) )

   385 				printf( __( '<strong>Caution:</strong> We recommend you back up your existing <code>wp-config.php</code> and <code>%s</code> files.' ), 'web.config' );

   386 			else

   387 				_e( '<strong>Caution:</strong> We recommend you back up your existing <code>wp-config.php</code> file.' );

   388 		?></p></div>

   389 <?php

   390 	}

   391 ?>

   392 		<ol>

   393 			<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>:' ), $location_of_wp_config ); ?></p>

   394 				<textarea class="code" readonly="readonly" cols="100" rows="7">

   395 define('MULTISITE', true);

   396 define('SUBDOMAIN_INSTALL', <?php echo $subdomain_install ? 'true' : 'false'; ?>);

   397 define('DOMAIN_CURRENT_SITE', '<?php echo $hostname; ?>');

   398 define('PATH_CURRENT_SITE', '<?php echo $base; ?>');

   399 define('SITE_ID_CURRENT_SITE', 1);

   400 define('BLOG_ID_CURRENT_SITE', 1);

   401 </textarea>

   402 <?php

   403 	$keys_salts = array( 'AUTH_KEY' => '', 'SECURE_AUTH_KEY' => '', 'LOGGED_IN_KEY' => '', 'NONCE_KEY' => '', 'AUTH_SALT' => '', 'SECURE_AUTH_SALT' => '', 'LOGGED_IN_SALT' => '', 'NONCE_SALT' => '' );

   404 	foreach ( $keys_salts as $c => $v ) {

   405 		if ( defined( $c ) )

   406 			unset( $keys_salts[ $c ] );

   407 	}

   408 

   409 	if ( ! empty( $keys_salts ) ) {

   410 		$keys_salts_str = '';

   411 		$from_api = wp_remote_get( 'https://api.wordpress.org/secret-key/1.1/salt/' );

   412 		if ( is_wp_error( $from_api ) ) {

   413 			foreach ( $keys_salts as $c => $v ) {

   414 				$keys_salts_str .= "\ndefine( '$c', '" . wp_generate_password( 64, true, true ) . "' );";

   415 			}

   416 		} else {

   417 			$from_api = explode( "\n", wp_remote_retrieve_body( $from_api ) );

   418 			foreach ( $keys_salts as $c => $v ) {

   419 				$keys_salts_str .= "\ndefine( '$c', '" . substr( array_shift( $from_api ), 28, 64 ) . "' );";

   420 			}

   421 		}

   422 		$num_keys_salts = count( $keys_salts );

   423 ?>

   424 	<p>

   425 		<?php

   426 			if ( 1 == $num_keys_salts ) {

   427 				_e( 'This unique authentication key is also missing from your <code>wp-config.php</code> file.' );

   428 			} else {

   429 				_e( 'These unique authentication keys are also missing from your <code>wp-config.php</code> file.' );

   430 			}

   431 		?>

   432 		<?php _e( 'To make your installation more secure, you should also add:' ); ?>

   433 	</p>

   434 	<textarea class="code" readonly="readonly" cols="100" rows="<?php echo $num_keys_salts; ?>"><?php echo esc_textarea( $keys_salts_str ); ?></textarea>

   435 <?php

   436 	}

   437 ?>

   438 </li>

   439 <?php

   440 	if ( iis7_supports_permalinks() ) :

   441 		// IIS doesn't support RewriteBase, all your RewriteBase are belong to us

   442 		$iis_subdir_match = ltrim( $base, '/' ) . $subdir_match;

   443 		$iis_rewrite_base = ltrim( $base, '/' ) . $rewrite_base;

   444 		$iis_subdir_replacement = $subdomain_install ? '' : '{R:1}';

   445 

   446 		$web_config_file = '<?xml version="1.0" encoding="UTF-8"?>

   447 <configuration>

   448     <system.webServer>

   449         <rewrite>

   450             <rules>

   451                 <rule name="WordPress Rule 1" stopProcessing="true">

   452                     <match url="^index\.php$" ignoreCase="false" />

   453                     <action type="None" />

   454                 </rule>';

   455 				if ( is_multisite() && get_site_option( 'ms_files_rewriting' ) ) {

   456 					$web_config_file .= '

   457                 <rule name="WordPress Rule for Files" stopProcessing="true">

   458                     <match url="^' . $iis_subdir_match . 'files/(.+)" ignoreCase="false" />

   459                     <action type="Rewrite" url="' . $iis_rewrite_base . WPINC . '/ms-files.php?file={R:1}" appendQueryString="false" />

   460                 </rule>';

   461                 }

   462                 $web_config_file .= '

   463                 <rule name="WordPress Rule 2" stopProcessing="true">

   464                     <match url="^' . $iis_subdir_match . 'wp-admin$" ignoreCase="false" />

   465                     <action type="Redirect" url="' . $iis_subdir_replacement . 'wp-admin/" redirectType="Permanent" />

   466                 </rule>

   467                 <rule name="WordPress Rule 3" stopProcessing="true">

   468                     <match url="^" ignoreCase="false" />

   469                     <conditions logicalGrouping="MatchAny">

   470                         <add input="{REQUEST_FILENAME}" matchType="IsFile" ignoreCase="false" />

   471                         <add input="{REQUEST_FILENAME}" matchType="IsDirectory" ignoreCase="false" />

   472                     </conditions>

   473                     <action type="None" />

   474                 </rule>

   475                 <rule name="WordPress Rule 4" stopProcessing="true">

   476                     <match url="^' . $iis_subdir_match . '(wp-(content|admin|includes).*)" ignoreCase="false" />

   477                     <action type="Rewrite" url="' . $iis_rewrite_base . '{R:1}" />

   478                 </rule>

   479                 <rule name="WordPress Rule 5" stopProcessing="true">

   480                     <match url="^' . $iis_subdir_match . '([_0-9a-zA-Z-]+/)?(.*\.php)$" ignoreCase="false" />

   481                     <action type="Rewrite" url="' . $iis_rewrite_base . '{R:2}" />

   482                 </rule>

   483                 <rule name="WordPress Rule 6" stopProcessing="true">

   484                     <match url="." ignoreCase="false" />

   485                     <action type="Rewrite" url="index.php" />

   486                 </rule>

   487             </rules>

   488         </rewrite>

   489     </system.webServer>

   490 </configuration>

   491 ';

   492 

   493 		echo '<li><p>';

   494 		/* translators: 1: a filename like .htaccess. 2: a file path. */

   495 		printf( __( 'Add the following to your %1$s file in %2$s, <strong>replacing</strong> other WordPress rules:' ),

   496 			'<code>web.config</code>', '<code>' . $home_path . '</code>' );

   497 		echo '</p>';

   498 		if ( ! $subdomain_install && WP_CONTENT_DIR != ABSPATH . 'wp-content' )

   499 			echo '<p><strong>' . __('Warning:') . ' ' . __( 'Subdirectory networks may not be fully compatible with custom wp-content directories.' ) . '</strong></p>';

   500 		?>

   501 		<textarea class="code" readonly="readonly" cols="100" rows="20"><?php echo esc_textarea( $web_config_file ); ?>

   502 		</textarea></li>

   503 		</ol>

   504 

   505 	<?php else : // end iis7_supports_permalinks(). construct an htaccess file instead:

   506 

   507 		$ms_files_rewriting = '';

   508 		if ( is_multisite() && get_site_option( 'ms_files_rewriting' ) ) {

   509 			$ms_files_rewriting = "\n# uploaded files\nRewriteRule ^";

   510 			$ms_files_rewriting .= $subdir_match . "files/(.+) {$rewrite_base}" . WPINC . "/ms-files.php?file={$subdir_replacement_12} [L]" . "\n";

   511 		}

   512 

   513 		$htaccess_file = <<<EOF

   514 RewriteEngine On

   515 RewriteBase {$base}

   516 RewriteRule ^index\.php$ - [L]

   517 {$ms_files_rewriting}

   518 # add a trailing slash to /wp-admin

   519 RewriteRule ^{$subdir_match}wp-admin$ {$subdir_replacement_01}wp-admin/ [R=301,L]

   520 

   521 RewriteCond %{REQUEST_FILENAME} -f [OR]

   522 RewriteCond %{REQUEST_FILENAME} -d

   523 RewriteRule ^ - [L]

   524 RewriteRule ^{$subdir_match}(wp-(content|admin|includes).*) {$rewrite_base}{$subdir_replacement_12} [L]

   525 RewriteRule ^{$subdir_match}(.*\.php)$ {$rewrite_base}$subdir_replacement_12 [L]

   526 RewriteRule . index.php [L]

   527 

   528 EOF;

   529 

   530 		echo '<li><p>';

   531 		/* translators: 1: a filename like .htaccess. 2: a file path. */

   532 		printf( __( 'Add the following to your %1$s file in %2$s, <strong>replacing</strong> other WordPress rules:' ),

   533 			'<code>.htaccess</code>', '<code>' . $home_path . '</code>' );

   534 		echo '</p>';

   535 		if ( ! $subdomain_install && WP_CONTENT_DIR != ABSPATH . 'wp-content' )

   536 			echo '<p><strong>' . __('Warning:') . ' ' . __( 'Subdirectory networks may not be fully compatible with custom wp-content directories.' ) . '</strong></p>';

   537 		?>

   538 		<textarea class="code" readonly="readonly" cols="100" rows="<?php echo substr_count( $htaccess_file, "\n" ) + 1; ?>">

   539 <?php echo esc_textarea( $htaccess_file ); ?></textarea></li>

   540 		</ol>

   541 

   542 	<?php endif; // end IIS/Apache code branches.

   543 

   544 	if ( !is_multisite() ) { ?>

   545 		<p><?php _e( '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>

   546 <?php

   547 	}

   548 }

   549