WordPress/wp-admin/options-network.php

<?php
/**
 * Network settings administration panel.
 *
 * @since 3.0
 *
 * @package WordPress
 * @subpackage Administration
 */

/** WordPress Administration Bootstrap */
require_once('./admin.php');

if ( ! is_super_admin() )
	wp_die(__('You do not have sufficient permissions to manage options for this blog.'));

$title = __('Network Settings');
$parent_file = 'options-network.php';

add_contextual_help($current_screen, __('<a href="http://codex.wordpress.org/Settings_Network_SubPanel" target="_blank">Network Settings</a>'));

include('./admin-header.php');
/*
This option panel does not save data to the options table.
It contains a multi-step process allowing the user to enable a network of WordPress sites.
*/

$dirs = array( substr( ABSPATH, 0, -1), ABSPATH . "wp-content" );
?>
<div class="wrap">
<?php screen_icon(); ?>
<h2><?php echo esc_html( $title ); ?></h2>

<form method="post" action="options-network.php">
<?php
function filestats( $err ) {
	print '<h2>' . esc_html__('Server Summary') . '</h2>';
	print '<p>' . __("If you post a message to the WordPress support forum at <a target='_blank' href='http://wordpress.org/support/'>http://wordpress.org/support/</a> then copy and paste the following information into your message:") . '</p>';

	print "<blockquote style='background: #eee; border: 1px solid #333; padding: 5px;'>";
	print "<br /><strong>ERROR: $err</strong><br />";
	clearstatcache();
	$files = array( "htaccess.dist", ".htaccess" );
	
	foreach ( (array) $files as $val ) {
		$stats = @stat( $val );
		if( $stats ) {
			print "<h2>$val</h2>";
			print "&nbsp;&nbsp;&nbsp;&nbsp;uid/gid: " . $stats[ 'uid' ] . "/" . $stats[ 'gid' ] . "<br />\n";
			print "&nbsp;&nbsp;&nbsp;&nbsp;size: " . $stats[ 'size' ] . "<br />";
			print "&nbsp;&nbsp;&nbsp;&nbsp;perms: " . substr( sprintf('%o', fileperms( $val ) ), -4 ) . "<br />";
			print "&nbsp;&nbsp;&nbsp;&nbsp;readable: ";
			print is_readable( $val ) == true ? "yes" : "no";
			print "<br />";
			print "&nbsp;&nbsp;&nbsp;&nbsp;writeable: ";
			print is_writeable( $val ) == true ? "yes" : "no";
			print "<br />";
		} elseif( file_exists( $val ) == false ) {
			print "<h2>$val</h2>";
			print "&nbsp;&nbsp;&nbsp;&nbsp;FILE NOT FOUND: $val<br />";
		}
	}
	print "</blockquote>";
}

function step2_htaccess() {
	global $base;

	// remove ending slash from $base and $url
	$htaccess = '';
	if( substr($base, -1 ) == '/') {
		$base = substr($base, 0, -1);
	}
	$htaccess_sample = ABSPATH . 'wp-admin/includes/htaccess.ms';
	if ( !file_exists( $htaccess_sample ) )
		wp_die("Sorry, I need a {$htaccess_sample} to work from. Please re-upload this file to your WordPress installation.");

	$htaccess_file = file( $htaccess_sample );
	$fp = @fopen( $htaccess_sample, "r" );
	if( $fp ) {
		while( !feof( $fp ) ) {
			$htaccess .= fgets( $fp, 4096 );
		}
		fclose( $fp );
		$htaccess_file = str_replace( "BASE", $base, $htaccess );
	} else {
		wp_die("Sorry, I need to be able to read {$htaccess_sample}. Please check the permissions on this file.");
	}

	//@todo: check for super-cache in use
?>
			<li><p>Replace the contents of your <code>.htaccess</code> with the following:</p>
				<textarea name="htaccess" cols="120" rows="20">
<?php echo $htaccess_file; ?>
				</textarea>
			</li>
<?php
}

function step1() {
	$rewrite_enabled = false;
	?>
	<h2><?php esc_html_e('Installing Network of WordPress Sites'); ?></h2>
	<p><?php _e('I will help you enable the features for creating a network of sites by asking you a few questions so that you can create configuration files and make a directory to store all your uploaded files.'); ?></p>
	
	<h2><?php esc_html_e('What do I need?'); ?></h2>
	<ul>
		<li>Access to your server to change directory permissions. This can be done through ssh or ftp for example.</li>
		<li>A valid email where your password and administrative emails will be sent.</li>
		<li> Wildcard dns records if you're going to use the virtual host (sub-domain) functionality. Check the <a href='http://trac.mu.wordpress.org/browser/trunk/README.txt'>README</a> for further details.</li>
	</ul>
	<?php
	$mod_rewrite_msg = "<p>If the <code>mod_rewrite</code> module 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>";
	
	if( function_exists( "apache_get_modules" ) ) {
		$modules = apache_get_modules();
		if( in_array( "mod_rewrite", $modules ) == false ) {
			echo "<p><strong>Warning!</strong> It looks like mod_rewrite is not installed.</p>" . $mod_rewrite_msg;
		} else {
			$rewrite_enabled = true;
		}
	} else {
		?><p>Please make sure <code>mod_rewrite</code> is installed as it will be activated at the end of this install.</p><?php
		echo $mod_rewrite_msg;
	}
	return $rewrite_enabled;
}

function printstep1form( $rewrite_enabled = false ) {
	$weblog_title = ucfirst( get_option( 'blogname' ) ) . ' Sites';
	$email = get_option( 'admin_email' );
	$hostname = get_clean_basedomain();
	if( substr( $hostname, 0, 4 ) == 'www.' )
		$nowww = substr( $hostname, 4 );

	wp_nonce_field( 'install-network-1' );
	?>
		<input type='hidden' name='action' value='step2' />
		<h2>Site Addresses</h2>
		<p>Please choose whether you would like sites in your WordPress install to use sub-domains or sub-directories. You can not change this later.</p>
		<?php if ( !$rewrite_enabled ) { ?>
		<p><strong>Note</strong> It looks like <code>mod_rewrite</code> is not installed.</p>
		<?php } ?>
		<p class="blog-address">
			<label><input type='radio' name='vhost' value='yes' <?php if( $rewrite_enabled ) echo 'checked="checked"'; ?> /> Sub-domains (like <code>blog1.example.com</code>)</label><br />
			<label><input type='radio' name='vhost' value='no' <?php if( !$rewrite_enabled ) echo 'checked="checked"'; ?> /> Sub-directories (like <code>example.com/blog1</code>)</label>
		</p>

		<h2>Server Address</h2>
		<?php if ( isset( $nowww ) ) { ?>
		<h3>We recommend you change your siteurl to <code><?php echo $nowww; ?></code> before enabling the network feature. It will still be possible to visit your site using the "www" prefix with an address like <code><?php echo $hostname; ?></code> but any links will not have the "www" prefix. </h3>
		<?php } ?>
		<table class="form-table">  
			<tr> 
				<th scope='row'>Server Address</th> 
				<td>
					<p>This will be the Internet address of your site: <strong><em><?php echo $hostname; ?></em></strong>.</p>
					<input type='hidden' name='basedomain' value='<?php echo $hostname ?>' />
					<p>Do not use an IP address (like 127.0.0.1) or a single word hostname like <q>localhost</q> as your server address.</p>
				</td> 
			</tr>
		</table>

		<h2>Site Details</h2>
		<table class="form-table">  
			<tr> 
				<th scope='row'>Site&nbsp;Title</th> 
				<td>
					<input name='weblog_title' type='text' size='45' value='<?php echo $weblog_title ?>' />
					<br />What would you like to call your site?
				</td> 
			</tr> 
			<tr> 
				<th scope='row'>Email</th> 
				<td>
					<input name='email' type='text' size='45' value='<?php echo $email ?>' /> 
					<br />Your email address.
				</td> 
			</tr> 
		</table> 
		<p class='submit'><input class="button" name='submit' type='submit' value='Proceed' /></p>
	<?php
}

function step2() {
?>
		<h2>Enabling WordPress Sites</h2>
		<p>Complete the following steps to enable the features for creating a network of sites. <strong>Note:</strong> We recommend you make a backup copy of your existing <code>wp-config.php</code> and <code>.htaccess</code> files.</p>
		<ol>
			<li>Create a <code>blogs.dir</code> directory in your <code>wp-content</code> directory. This directory is used to stored uploaded media for your additional sites and must be writeable by the web server.</li>
<?php step2_config(); ?>
<?php step2_htaccess(); ?>
		</ol>
<?php
}

function step2_config() {
	global $base, $wpdb, $vhost;

	$vhost   = stripslashes($_POST['vhost' ]);
	$prefix  = $wpdb->base_prefix;

	$config_sample = ABSPATH . 'wp-admin/includes/wp-config.ms';
	if ( !file_exists( $config_sample ) )
		wp_die("Sorry, I need a {$config_sample} to work from. Please re-upload this file to your WordPress installation.");

	$wp_config_file = file( $config_sample );
?>
			<li><p>Replace the contents of your <code>wp-config.php</code> with the following:</p>
				<textarea name="wp-config" cols="120" rows="20">
<?php
	foreach ($wp_config_file as $line) {
		switch ( trim( substr($line,0,16) ) ) {
			case "define('DB_NAME'":
				$output = str_replace("wordpress", DB_NAME, $line);
				break;
			case "define('DB_USER'":
				$output = str_replace("username", DB_USER, $line);
				break;
			case "define('DB_PASSW":
				$output = str_replace("password", DB_PASSWORD, $line);
				break;
			case "define('DB_HOST'":
				$output = str_replace("localhost", DB_HOST, $line);
				break;
			case "define('VHOST',":
				$output = str_replace("VHOSTSETTING", $vhost, $line);
				break;
			case '$table_prefix  =':
				$output = str_replace('wp_', $prefix, $line);
				break;
			case '$base = \'BASE\';':
				$output = str_replace('BASE', $base, $line);
				break;
			case "define('DOMAIN_C":
				$domain = get_clean_basedomain();
				$output = str_replace("current_site_domain", $domain, $line);
				break;
			case "define('PATH_CUR":
				$output = str_replace("current_site_path", $base, $line);
				break;
			case "define('AUTH_KEY":
			case "define('AUTH_SAL":
			case "define('LOGGED_I":
			case "define('SECURE_A":
			case "define('NONCE_KE":
				$constant = substr( $line, 8, strpos( $line, "'", 9 ) - 8 );
				if ( defined( $constant ) )
					$hash = constant( $constant );
				else
					$hash = md5( mt_rand() ) . md5( mt_rand() );
				$output = str_replace('put your unique phrase here', $hash, $line);
				break;
			default:
				$output = $line;
				break;
		}
		echo $output;
	}
?>
				</textarea>
			</li>
<?php
}

function get_clean_basedomain() {
	global $wpdb;
	$domain = preg_replace( '|https?://|', '', get_option( 'siteurl') );
	if( strpos( $domain, '/' ) )
		$domain = substr( $domain, 0, strpos( $domain, '/' ) );
	return $domain;
}

$action = isset($_POST[ 'action' ]) ? $_POST[ 'action' ] : null; 
switch($action) {
	case "step2":
		check_admin_referer( 'install-network-1' );
		
		// Install!
		$base = stripslashes( dirname( dirname($_SERVER["SCRIPT_NAME"]) ) );
		if( $base != "/")
			$base .= "/";

		require_once( ABSPATH . 'wp-admin/includes/upgrade.php' );
		// create network tables
		$domain = get_clean_basedomain();
		install_network();
		populate_network( 1, $domain, sanitize_email( $_POST[ 'email' ] ), $_POST[ 'weblog_title' ], $base, $_POST[ 'vhost' ] );
		// create wp-config.php / htaccess
		step2();
	break;
	default:
		//@todo: give an informative screen instead
		if ( is_multisite() ) {
			_e('Network already enabled');
		} else {
			$rewrite_enabled = step1();
			printstep1form($rewrite_enabled);
		}
	break;
}
?>
</form>
</div>

<?php include('./admin-footer.php'); ?>