WordPress/wp-admin/upgrade-functions.php

<?php

if ( file_exists(ABSPATH . 'wp-content/install.php') )
	require (ABSPATH . 'wp-content/install.php');
require_once(ABSPATH . '/wp-admin/admin-functions.php');
require_once(ABSPATH . '/wp-admin/admin-db.php');
require_once(ABSPATH . '/wp-admin/upgrade-schema.php');
require_once(ABSPATH . WPINC . '/registration.php');

if ( !function_exists('wp_install') ) :
function wp_install($blog_title, $user_name, $user_email, $public, $meta='') {
	global $wp_rewrite;

	wp_cache_flush();
	make_db_current_silent();
	populate_options();
	populate_roles();

	update_option('blogname', $blog_title);
	update_option('admin_email', $user_email);
	update_option('blog_public', $public);
	$schema = ( isset($_SERVER['HTTPS']) && strtolower($_SERVER['HTTPS']) == 'on' ) ? 'https://' : 'http://';
	$guessurl = preg_replace('|/wp-admin/.*|i', '', $schema . $_SERVER['HTTP_HOST'] . $_SERVER['REQUEST_URI']);
	update_option('siteurl', $guessurl);

	// If not a public blog, don't ping.
	if ( ! $public )
		update_option('default_pingback_flag', 0);

	// Create default user.  If the user already exists, the user tables are
	// being shared among blogs.  Just set the role in that case.
	$user_id = username_exists($user_name);
	if ( !$user_id ) {
		$random_password = substr(md5(uniqid(microtime())), 0, 6);
		$user_id = wp_create_user($user_name, $random_password, $user_email);
	} else {
		$random_password = __('User already exists.  Password inherited.');
	}

	$user = new WP_User($user_id);
	$user->set_role('administrator');

	wp_install_defaults($user_id);

	$wp_rewrite->flush_rules();

	wp_new_blog_notification($blog_title, $guessurl, $user_id, $random_password);

	wp_cache_flush();

	return array('url' => $guessurl, 'user_id' => $user_id, 'password' => $random_password);
}
endif;

if ( !function_exists('wp_install_defaults') ) :
function wp_install_defaults($user_id) {
	global $wpdb;

	// Default category
	$wpdb->query("INSERT INTO $wpdb->categories (cat_ID, cat_name, category_nicename, category_count, category_description) VALUES ('0', '".$wpdb->escape(__('Uncategorized'))."', '".sanitize_title(__('Uncategorized'))."', '1', '')");

	// Default link category
	$wpdb->query("INSERT INTO $wpdb->categories (cat_ID, cat_name, category_nicename, link_count, category_description) VALUES ('0', '".$wpdb->escape(__('Blogroll'))."', '".sanitize_title(__('Blogroll'))."', '7', '')");

	// Now drop in some default links
	$wpdb->query("INSERT INTO $wpdb->links (link_url, link_name, link_category, link_rss, link_notes) VALUES ('http://inphotos.org/', 'Donncha', 0, 'http://inphotos.org/feed/', '');");
	$wpdb->query( "INSERT INTO $wpdb->link2cat (`link_id`, `category_id`) VALUES (1, 2)" );

	$wpdb->query("INSERT INTO $wpdb->links (link_url, link_name, link_category, link_rss, link_notes) VALUES ('http://zengun.org/weblog/', 'Michel', 0, 'http://zengun.org/weblog/feed/', '');");
	$wpdb->query( "INSERT INTO $wpdb->link2cat (`link_id`, `category_id`) VALUES (2, 2)" );

	$wpdb->query("INSERT INTO $wpdb->links (link_url, link_name, link_category, link_rss, link_notes) VALUES ('http://boren.nu/', 'Ryan', 0, 'http://boren.nu/feed/', '');");
	$wpdb->query( "INSERT INTO $wpdb->link2cat (`link_id`, `category_id`) VALUES (3, 2)" );

	$wpdb->query("INSERT INTO $wpdb->links (link_url, link_name, link_category, link_rss, link_notes) VALUES ('http://photomatt.net/', 'Matt', 0, 'http://xml.photomatt.net/feed/', '');");
	$wpdb->query( "INSERT INTO $wpdb->link2cat (`link_id`, `category_id`) VALUES (4, 2)" );

	$wpdb->query("INSERT INTO $wpdb->links (link_url, link_name, link_category, link_rss, link_notes) VALUES ('http://zed1.com/journalized/', 'Mike', 0, 'http://zed1.com/journalized/feed/', '');");
	$wpdb->query( "INSERT INTO $wpdb->link2cat (`link_id`, `category_id`) VALUES (5, 2)" );

	$wpdb->query("INSERT INTO $wpdb->links (link_url, link_name, link_category, link_rss, link_notes) VALUES ('http://www.alexking.org/', 'Alex', 0, 'http://www.alexking.org/blog/wp-rss2.php', '');");
	$wpdb->query( "INSERT INTO $wpdb->link2cat (`link_id`, `category_id`) VALUES (6, 2)" );

	$wpdb->query("INSERT INTO $wpdb->links (link_url, link_name, link_category, link_rss, link_notes) VALUES ('http://dougal.gunters.org/', 'Dougal', 0, 'http://dougal.gunters.org/feed/', '');");
	$wpdb->query( "INSERT INTO $wpdb->link2cat (`link_id`, `category_id`) VALUES (7, 2)" );

	// First post
	$now = date('Y-m-d H:i:s');
	$now_gmt = gmdate('Y-m-d H:i:s');
	$wpdb->query("INSERT INTO $wpdb->posts (post_author, post_date, post_date_gmt, post_content, post_excerpt, post_title, post_category, post_name, post_modified, post_modified_gmt, comment_count, to_ping, pinged, post_content_filtered) VALUES ($user_id, '$now', '$now_gmt', '".$wpdb->escape(__('Welcome to WordPress. This is your first post. Edit or delete it, then start blogging!'))."', '', '".$wpdb->escape(__('Hello world!'))."', '0', '".$wpdb->escape(__('hello-world'))."', '$now', '$now_gmt', '1', '', '', '')");

	$wpdb->query( "INSERT INTO $wpdb->post2cat (`rel_id`, `post_id`, `category_id`) VALUES (1, 1, 1)" );

	// Default comment
	$wpdb->query("INSERT INTO $wpdb->comments (comment_post_ID, comment_author, comment_author_email, comment_author_url, comment_date, comment_date_gmt, comment_content) VALUES ('1', '".$wpdb->escape(__('Mr WordPress'))."', '', 'http://wordpress.org/', '$now', '$now_gmt', '".$wpdb->escape(__('Hi, this is a comment.<br />To delete a comment, just log in and view the post&#039;s comments. There you will have the option to edit or delete them.'))."')");

	// First Page
	$wpdb->query("INSERT INTO $wpdb->posts (post_author, post_date, post_date_gmt, post_content, post_excerpt, post_title, post_category, post_name, post_modified, post_modified_gmt, post_status, post_type, to_ping, pinged, post_content_filtered) VALUES ($user_id, '$now', '$now_gmt', '".$wpdb->escape(__('This is an example of a WordPress page, you could edit this to put information about yourself or your site so readers know where you are coming from. You can create as many pages like this one or sub-pages as you like and manage all of your content inside of WordPress.'))."', '', '".$wpdb->escape(__('About'))."', '0', '".$wpdb->escape(__('about'))."', '$now', '$now_gmt', 'publish', 'page', '', '', '')");
}
endif;

if ( !function_exists('wp_new_blog_notification') ) :
function wp_new_blog_notification($blog_title, $blog_url, $user_id, $password) {
	$user = new WP_User($user_id);
	$email = $user->user_email;
	$name = $user->user_login;
	$message_headers = 'From: "' . $blog_title . '" <wordpress@' . $_SERVER['SERVER_NAME'] . '>';
	$message = sprintf(__("Your new WordPress blog has been successfully set up at:

%1\$s

You can log in to the administrator account with the following information:

Username: %2\$s
Password: %3\$s

We hope you enjoy your new weblog. Thanks!

--The WordPress Team
http://wordpress.org/
"), $blog_url, $name, $password);

	@wp_mail($email, __('New WordPress Blog'), $message, $message_headers);
}
endif;

if ( !function_exists('wp_upgrade') ) :
function wp_upgrade() {
	global $wp_current_db_version, $wp_db_version;

	$wp_current_db_version = __get_option('db_version');

	// We are up-to-date.  Nothing to do.
	if ( $wp_db_version == $wp_current_db_version )
		return;

	wp_cache_flush();
	make_db_current_silent();
	upgrade_all();
	wp_cache_flush();
}
endif;

// Functions to be called in install and upgrade scripts
function upgrade_all() {
	global $wp_current_db_version, $wp_db_version, $wp_rewrite;
	$wp_current_db_version = __get_option('db_version');

	// We are up-to-date.  Nothing to do.
	if ( $wp_db_version == $wp_current_db_version )
		return;

	// If the version is not set in the DB, try to guess the version.
	if ( empty($wp_current_db_version) ) {
		$wp_current_db_version = 0;

		// If the template option exists, we have 1.5.
		$template = __get_option('template');
		if ( !empty($template) )
			$wp_current_db_version = 2541;
	}

	populate_options();

	if ( $wp_current_db_version < 2541 ) {
		upgrade_100();
		upgrade_101();
		upgrade_110();
		upgrade_130();
	}

	if ( $wp_current_db_version < 3308 )
		upgrade_160();

	if ( $wp_current_db_version < 3845 )
		upgrade_210();

	if ( $wp_current_db_version < 4351 )
		upgrade_old_slugs();

	$wp_rewrite->flush_rules();

	update_option('db_version', $wp_db_version);
}

function upgrade_100() {
	global $wpdb;

	// Get the title and ID of every post, post_name to check if it already has a value
	$posts = $wpdb->get_results("SELECT ID, post_title, post_name FROM $wpdb->posts WHERE post_name = ''");
	if ($posts) {
		foreach($posts as $post) {
			if ('' == $post->post_name) {
				$newtitle = sanitize_title($post->post_title);
				$wpdb->query("UPDATE $wpdb->posts SET post_name = '$newtitle' WHERE ID = '$post->ID'");
			}
		}
	}

	$categories = $wpdb->get_results("SELECT cat_ID, cat_name, category_nicename FROM $wpdb->categories");
	foreach ($categories as $category) {
		if ('' == $category->category_nicename) {
			$newtitle = sanitize_title($category->cat_name);
			$wpdb->query("UPDATE $wpdb->categories SET category_nicename = '$newtitle' WHERE cat_ID = '$category->cat_ID'");
		}
	}


	$wpdb->query("UPDATE $wpdb->options SET option_value = REPLACE(option_value, 'wp-links/links-images/', 'wp-images/links/')
	WHERE option_name LIKE 'links_rating_image%'
	AND option_value LIKE 'wp-links/links-images/%'");

	$done_ids = $wpdb->get_results("SELECT DISTINCT post_id FROM $wpdb->post2cat");
	if ($done_ids) :
		foreach ($done_ids as $done_id) :
			$done_posts[] = $done_id->post_id;
		endforeach;
		$catwhere = ' AND ID NOT IN (' . implode(',', $done_posts) . ')';
	else:
		$catwhere = '';
	endif;

	$allposts = $wpdb->get_results("SELECT ID, post_category FROM $wpdb->posts WHERE post_category != '0' $catwhere");
	if ($allposts) :
		foreach ($allposts as $post) {
			// Check to see if it's already been imported
			$cat = $wpdb->get_row("SELECT * FROM $wpdb->post2cat WHERE post_id = $post->ID AND category_id = $post->post_category");
			if (!$cat && 0 != $post->post_category) { // If there's no result
				$wpdb->query("
					INSERT INTO $wpdb->post2cat
					(post_id, category_id)
					VALUES
					('$post->ID', '$post->post_category')
					");
			}
		}
	endif;
}

function upgrade_101() {
	global $wpdb;

	// Clean up indices, add a few
	add_clean_index($wpdb->posts, 'post_name');
	add_clean_index($wpdb->posts, 'post_status');
	add_clean_index($wpdb->categories, 'category_nicename');
	add_clean_index($wpdb->comments, 'comment_approved');
	add_clean_index($wpdb->comments, 'comment_post_ID');
	add_clean_index($wpdb->links , 'link_category');
	add_clean_index($wpdb->links , 'link_visible');
}


function upgrade_110() {
	global $wpdb;

	// Set user_nicename.
	$users = $wpdb->get_results("SELECT ID, user_nickname, user_nicename FROM $wpdb->users");
	foreach ($users as $user) {
		if ('' == $user->user_nicename) {
			$newname = sanitize_title($user->user_nickname);
			$wpdb->query("UPDATE $wpdb->users SET user_nicename = '$newname' WHERE ID = '$user->ID'");
		}
	}

	$users = $wpdb->get_results("SELECT ID, user_pass from $wpdb->users");
	foreach ($users as $row) {
		if (!preg_match('/^[A-Fa-f0-9]{32}$/', $row->user_pass)) {
			$wpdb->query('UPDATE '.$wpdb->users.' SET user_pass = MD5(\''.$row->user_pass.'\') WHERE ID = \''.$row->ID.'\'');
		}
	}


	// Get the GMT offset, we'll use that later on
	$all_options = get_alloptions_110();

	$time_difference = $all_options->time_difference;

	$server_time = time()+date('Z');
	$weblogger_time = $server_time + $time_difference*3600;
	$gmt_time = time();

	$diff_gmt_server = ($gmt_time - $server_time) / 3600;
	$diff_weblogger_server = ($weblogger_time - $server_time) / 3600;
	$diff_gmt_weblogger = $diff_gmt_server - $diff_weblogger_server;
	$gmt_offset = -$diff_gmt_weblogger;

	// Add a gmt_offset option, with value $gmt_offset
	add_option('gmt_offset', $gmt_offset);

	// Check if we already set the GMT fields (if we did, then
	// MAX(post_date_gmt) can't be '0000-00-00 00:00:00'
	// <michel_v> I just slapped myself silly for not thinking about it earlier
	$got_gmt_fields = ($wpdb->get_var("SELECT MAX(post_date_gmt) FROM $wpdb->posts") == '0000-00-00 00:00:00') ? false : true;

	if (!$got_gmt_fields) {

		// Add or substract time to all dates, to get GMT dates
		$add_hours = intval($diff_gmt_weblogger);
		$add_minutes = intval(60 * ($diff_gmt_weblogger - $add_hours));
		$wpdb->query("UPDATE $wpdb->posts SET post_date_gmt = DATE_ADD(post_date, INTERVAL '$add_hours:$add_minutes' HOUR_MINUTE)");
		$wpdb->query("UPDATE $wpdb->posts SET post_modified = post_date");
		$wpdb->query("UPDATE $wpdb->posts SET post_modified_gmt = DATE_ADD(post_modified, INTERVAL '$add_hours:$add_minutes' HOUR_MINUTE) WHERE post_modified != '0000-00-00 00:00:00'");
		$wpdb->query("UPDATE $wpdb->comments SET comment_date_gmt = DATE_ADD(comment_date, INTERVAL '$add_hours:$add_minutes' HOUR_MINUTE)");
		$wpdb->query("UPDATE $wpdb->users SET user_registered = DATE_ADD(user_registered, INTERVAL '$add_hours:$add_minutes' HOUR_MINUTE)");
	}

}

function upgrade_130() {
	global $wpdb;

	// Remove extraneous backslashes.
	$posts = $wpdb->get_results("SELECT ID, post_title, post_content, post_excerpt, guid, post_date, post_name, post_status, post_author FROM $wpdb->posts");
	if ($posts) {
		foreach($posts as $post) {
			$post_content = addslashes(deslash($post->post_content));
			$post_title = addslashes(deslash($post->post_title));
			$post_excerpt = addslashes(deslash($post->post_excerpt));
			if ( empty($post->guid) )
				$guid = get_permalink($post->ID);
			else
				$guid = $post->guid;

			$wpdb->query("UPDATE $wpdb->posts SET post_title = '$post_title', post_content = '$post_content', post_excerpt = '$post_excerpt', guid = '$guid' WHERE ID = '$post->ID'");
		}
	}

	// Remove extraneous backslashes.
	$comments = $wpdb->get_results("SELECT comment_ID, comment_author, comment_content FROM $wpdb->comments");
	if ($comments) {
		foreach($comments as $comment) {
			$comment_content = addslashes(deslash($comment->comment_content));
			$comment_author = addslashes(deslash($comment->comment_author));
			$wpdb->query("UPDATE $wpdb->comments SET comment_content = '$comment_content', comment_author = '$comment_author' WHERE comment_ID = '$comment->comment_ID'");
		}
	}

	// Remove extraneous backslashes.
	$links = $wpdb->get_results("SELECT link_id, link_name, link_description FROM $wpdb->links");
	if ($links) {
		foreach($links as $link) {
			$link_name = addslashes(deslash($link->link_name));
			$link_description = addslashes(deslash($link->link_description));
			$wpdb->query("UPDATE $wpdb->links SET link_name = '$link_name', link_description = '$link_description' WHERE link_id = '$link->link_id'");
		}
	}

	// The "paged" option for what_to_show is no more.
	if ($wpdb->get_var("SELECT option_value FROM $wpdb->options WHERE option_name = 'what_to_show'") == 'paged') {
		$wpdb->query("UPDATE $wpdb->options SET option_value = 'posts' WHERE option_name = 'what_to_show'");
	}

	$active_plugins = __get_option('active_plugins');

	// If plugins are not stored in an array, they're stored in the old
	// newline separated format.  Convert to new format.
	if ( !is_array( $active_plugins ) ) {
		$active_plugins = explode("\n", trim($active_plugins));
		update_option('active_plugins', $active_plugins);
	}

	// Obsolete tables
	$wpdb->query('DROP TABLE IF EXISTS ' . $wpdb->prefix . 'optionvalues');
	$wpdb->query('DROP TABLE IF EXISTS ' . $wpdb->prefix . 'optiontypes');
	$wpdb->query('DROP TABLE IF EXISTS ' . $wpdb->prefix . 'optiongroups');
	$wpdb->query('DROP TABLE IF EXISTS ' . $wpdb->prefix . 'optiongroup_options');

	// Update comments table to use comment_type
	$wpdb->query("UPDATE $wpdb->comments SET comment_type='trackback', comment_content = REPLACE(comment_content, '<trackback />', '') WHERE comment_content LIKE '<trackback />%'");
	$wpdb->query("UPDATE $wpdb->comments SET comment_type='pingback', comment_content = REPLACE(comment_content, '<pingback />', '') WHERE comment_content LIKE '<pingback />%'");

	// Some versions have multiple duplicate option_name rows with the same values
	$options = $wpdb->get_results("SELECT option_name, COUNT(option_name) AS dupes FROM `$wpdb->options` GROUP BY option_name");
	foreach ( $options as $option ) {
		if ( 1 != $option->dupes ) { // Could this be done in the query?
			$limit = $option->dupes - 1;
			$dupe_ids = $wpdb->get_col("SELECT option_id FROM $wpdb->options WHERE option_name = '$option->option_name' LIMIT $limit");
			$dupe_ids = join($dupe_ids, ',');
			$wpdb->query("DELETE FROM $wpdb->options WHERE option_id IN ($dupe_ids)");
		}
	}

	make_site_theme();
}

function upgrade_160() {
	global $wpdb, $wp_current_db_version;

	populate_roles_160();

	$users = $wpdb->get_results("SELECT * FROM $wpdb->users");
	foreach ( $users as $user ) :
		if ( !empty( $user->user_firstname ) )
			update_usermeta( $user->ID, 'first_name', $wpdb->escape($user->user_firstname) );
		if ( !empty( $user->user_lastname ) )
			update_usermeta( $user->ID, 'last_name', $wpdb->escape($user->user_lastname) );
		if ( !empty( $user->user_nickname ) )
			update_usermeta( $user->ID, 'nickname', $wpdb->escape($user->user_nickname) );
		if ( !empty( $user->user_level ) )
			update_usermeta( $user->ID, $wpdb->prefix . 'user_level', $user->user_level );
		if ( !empty( $user->user_icq ) )
			update_usermeta( $user->ID, 'icq', $wpdb->escape($user->user_icq) );
		if ( !empty( $user->user_aim ) )
			update_usermeta( $user->ID, 'aim', $wpdb->escape($user->user_aim) );
		if ( !empty( $user->user_msn ) )
			update_usermeta( $user->ID, 'msn', $wpdb->escape($user->user_msn) );
		if ( !empty( $user->user_yim ) )
			update_usermeta( $user->ID, 'yim', $wpdb->escape($user->user_icq) );
		if ( !empty( $user->user_description ) )
			update_usermeta( $user->ID, 'description', $wpdb->escape($user->user_description) );

		if ( isset( $user->user_idmode ) ):
			$idmode = $user->user_idmode;
			if ($idmode == 'nickname') $id = $user->user_nickname;
			if ($idmode == 'login') $id = $user->user_login;
			if ($idmode == 'firstname') $id = $user->user_firstname;
			if ($idmode == 'lastname') $id = $user->user_lastname;
			if ($idmode == 'namefl') $id = $user->user_firstname.' '.$user->user_lastname;
			if ($idmode == 'namelf') $id = $user->user_lastname.' '.$user->user_firstname;
			if (!$idmode) $id = $user->user_nickname;
			$id = $wpdb->escape( $id );
			$wpdb->query("UPDATE $wpdb->users SET display_name = '$id' WHERE ID = '$user->ID'");
		endif;

		// FIXME: RESET_CAPS is temporary code to reset roles and caps if flag is set.
		$caps = get_usermeta( $user->ID, $wpdb->prefix . 'capabilities');
		if ( empty($caps) || defined('RESET_CAPS') ) {
			$level = get_usermeta($user->ID, $wpdb->prefix . 'user_level');
			$role = translate_level_to_role($level);
			update_usermeta( $user->ID, $wpdb->prefix . 'capabilities', array($role => true) );
		}

	endforeach;
	$old_user_fields = array( 'user_firstname', 'user_lastname', 'user_icq', 'user_aim', 'user_msn', 'user_yim', 'user_idmode', 'user_ip', 'user_domain', 'user_browser', 'user_description', 'user_nickname', 'user_level' );
	$wpdb->hide_errors();
	foreach ( $old_user_fields as $old )
		$wpdb->query("ALTER TABLE $wpdb->users DROP $old");
	$wpdb->show_errors();

	if ( 0 == $wpdb->get_var("SELECT SUM(category_count) FROM $wpdb->categories") ) { // Create counts
		$categories = $wpdb->get_col("SELECT cat_ID FROM $wpdb->categories");
		foreach ( $categories as $cat_id ) {
			$count = $wpdb->get_var("SELECT COUNT(*) FROM $wpdb->post2cat, $wpdb->posts WHERE $wpdb->posts.ID=$wpdb->post2cat.post_id AND post_status='publish' AND category_id = '$cat_id'");
			$wpdb->query("UPDATE $wpdb->categories SET category_count = '$count' WHERE cat_ID = '$cat_id'");
		}
	}

	// populate comment_count field of posts table
	$comments = $wpdb->get_results( "SELECT comment_post_ID, COUNT(*) as c FROM $wpdb->comments WHERE comment_approved = '1' GROUP BY comment_post_ID" );
	if( is_array( $comments ) ) {
		foreach ($comments as $comment) {
			$wpdb->query( "UPDATE $wpdb->posts SET comment_count = $comment->c WHERE ID = '$comment->comment_post_ID'" );
		}
	}

	// Some alpha versions used a post status of object instead of attachment and put
	// the mime type in post_type instead of post_mime_type.
	if ( $wp_current_db_version > 2541 && $wp_current_db_version <= 3091 ) {
		$objects = $wpdb->get_results("SELECT ID, post_type FROM $wpdb->posts WHERE post_status = 'object'");
		foreach ($objects as $object) {
			$wpdb->query("UPDATE $wpdb->posts SET post_status = 'attachment',
			post_mime_type = '$object->post_type',
			post_type = ''
			WHERE ID = $object->ID");

			$meta = get_post_meta($object->ID, 'imagedata', true);
			if ( ! empty($meta['file']) )
				update_attached_file( $object->ID, $meta['file'] );
		}
	}
}

function upgrade_210() {
	global $wpdb, $wp_current_db_version;

	if ( $wp_current_db_version < 3506 ) {
		// Update status and type.
		$posts = $wpdb->get_results("SELECT ID, post_status FROM $wpdb->posts");

		if ( ! empty($posts) ) foreach ($posts as $post) {
			$status = $post->post_status;
			$type = 'post';

			if ( 'static' == $status ) {
				$status = 'publish';
				$type = 'page';
			} else if ( 'attachment' == $status ) {
				$status = 'inherit';
				$type = 'attachment';
			}

			$wpdb->query("UPDATE $wpdb->posts SET post_status = '$status', post_type = '$type' WHERE ID = '$post->ID'");
		}
	}

	if ( $wp_current_db_version < 3845 ) {
		populate_roles_210();
	}

	if ( $wp_current_db_version < 3531 ) {
		// Give future posts a post_status of future.
		$now = gmdate('Y-m-d H:i:59');
		$wpdb->query ("UPDATE $wpdb->posts SET post_status = 'future' WHERE post_status = 'publish' AND post_date_gmt > '$now'");

		$posts = $wpdb->get_results("SELECT ID, post_date FROM $wpdb->posts WHERE post_status ='future'");
		if ( !empty($posts) )
			foreach ( $posts as $post )
				wp_schedule_single_event(mysql2date('U', $post->post_date), 'publish_future_post', array($post->ID));
	}

	if ( $wp_current_db_version < 3570 ) {
		// Create categories for link categories if a category with the same
		// name doesn't exist.  Create a map of link cat IDs to cat IDs.
		$link_cat_id_map = array();
		$link_cats = $wpdb->get_results("SELECT cat_id, cat_name FROM " . $wpdb->prefix . 'linkcategories');
		foreach ( $link_cats as $link_cat) {
			if ( $cat_id = category_exists($link_cat->cat_name) ) {
				$link_cat_id_map[$link_cat->cat_id] = $cat_id;
				$default_link_cat = $cat_id;
			} else {
				$link_cat_id_map[$link_cat->cat_id] = wp_create_category($link_cat->cat_name);
				$default_link_cat = $link_cat_id_map[$link_cat->cat_id];
			}
		}

		// Associate links to cats.
		$links = $wpdb->get_results("SELECT link_id, link_category FROM $wpdb->links");
		if ( !empty($links) ) foreach ( $links as $link ) {
			if ( 0 == $link->link_category )
				continue;
			if ( ! isset($link_cat_id_map[$link->link_category]) )
				continue;
			$link_cat = $link_cat_id_map[$link->link_category];
			$cat = $wpdb->get_row("SELECT * FROM $wpdb->link2cat WHERE link_id = '$link->link_id' AND category_id = '$link_cat'");
			if ( !$cat ) {
				$wpdb->query("INSERT INTO $wpdb->link2cat (link_id, category_id)
					VALUES ('$link->link_id', '$link_cat')");
			}
		}

		// Set default to the last category we grabbed during the upgrade loop.
		update_option('default_link_category', $default_link_cat);

		// Count links per category.
		if ( 0 == $wpdb->get_var("SELECT SUM(link_count) FROM $wpdb->categories") ) {
			$categories = $wpdb->get_col("SELECT cat_ID FROM $wpdb->categories");
			foreach ( $categories as $cat_id ) {
				$count = $wpdb->get_var("SELECT COUNT(*) FROM $wpdb->link2cat, $wpdb->links WHERE $wpdb->links.link_id = $wpdb->link2cat.link_id AND category_id = '$cat_id'");
				$wpdb->query("UPDATE $wpdb->categories SET link_count = '$count' WHERE cat_ID = '$cat_id'");
			}
		}

		// Obsolete linkcategories table
		$wpdb->query('DROP TABLE IF EXISTS ' . $wpdb->prefix . 'linkcategories');
	}
}

function upgrade_old_slugs() {
	// upgrade people who were using the Redirect Old Slugs plugin
	global $wpdb;
	$wpdb->query("UPDATE $wpdb->postmeta SET meta_key = '_wp_old_slug' WHERE meta_key = 'old_slug'");
}


// The functions we use to actually do stuff

// General
function maybe_create_table($table_name, $create_ddl) {
	global $wpdb;
	foreach ($wpdb->get_col("SHOW TABLES",0) as $table ) {
		if ($table == $table_name) {
			return true;
		}
	}
	//didn't find it try to create it.
	$q = $wpdb->query($create_ddl);
	// we cannot directly tell that whether this succeeded!
	foreach ($wpdb->get_col("SHOW TABLES",0) as $table ) {
		if ($table == $table_name) {
			return true;
		}
	}
	return false;
}

function drop_index($table, $index) {
	global $wpdb;
	$wpdb->hide_errors();
	$wpdb->query("ALTER TABLE `$table` DROP INDEX `$index`");
	// Now we need to take out all the extra ones we may have created
	for ($i = 0; $i < 25; $i++) {
		$wpdb->query("ALTER TABLE `$table` DROP INDEX `{$index}_$i`");
	}
	$wpdb->show_errors();
	return true;
}

function add_clean_index($table, $index) {
	global $wpdb;
	drop_index($table, $index);
	$wpdb->query("ALTER TABLE `$table` ADD INDEX ( `$index` )");
	return true;
}

/**
 ** maybe_add_column()
 ** Add column to db table if it doesn't exist.
 ** Returns:  true if already exists or on successful completion
 **           false on error
 */
function maybe_add_column($table_name, $column_name, $create_ddl) {
	global $wpdb, $debug;
	foreach ($wpdb->get_col("DESC $table_name", 0) as $column ) {
		if ($debug) echo("checking $column == $column_name<br />");
		if ($column == $column_name) {
			return true;
		}
	}
	//didn't find it try to create it.
	$q = $wpdb->query($create_ddl);
	// we cannot directly tell that whether this succeeded!
	foreach ($wpdb->get_col("DESC $table_name", 0) as $column ) {
		if ($column == $column_name) {
			return true;
		}
	}
	return false;
}


// get_alloptions as it was for 1.2.
function get_alloptions_110() {
	global $wpdb;
	if ($options = $wpdb->get_results("SELECT option_name, option_value FROM $wpdb->options")) {
		foreach ($options as $option) {
			// "When trying to design a foolproof system,
			//  never underestimate the ingenuity of the fools :)" -- Dougal
			if ('siteurl' == $option->option_name) $option->option_value = preg_replace('|/+$|', '', $option->option_value);
			if ('home' == $option->option_name) $option->option_value = preg_replace('|/+$|', '', $option->option_value);
			if ('category_base' == $option->option_name) $option->option_value = preg_replace('|/+$|', '', $option->option_value);
			$all_options->{$option->option_name} = stripslashes($option->option_value);
		}
	}
	return $all_options;
}

// Version of get_option that is private to install/upgrade.
function __get_option($setting) {
	global $wpdb;

	$option = $wpdb->get_var("SELECT option_value FROM $wpdb->options WHERE option_name = '$setting'");

	if ( 'home' == $setting && '' == $option )
		return __get_option('siteurl');

	if ( 'siteurl' == $setting || 'home' == $setting || 'category_base' == $setting )
		$option = preg_replace('|/+$|', '', $option);

	@ $kellogs = unserialize($option);
	if ($kellogs !== FALSE)
		return $kellogs;
	else
		return $option;
}

function deslash($content) {
	// Note: \\\ inside a regex denotes a single backslash.

	// Replace one or more backslashes followed by a single quote with
	// a single quote.
	$content = preg_replace("/\\\+'/", "'", $content);

	// Replace one or more backslashes followed by a double quote with
	// a double quote.
	$content = preg_replace('/\\\+"/', '"', $content);

	// Replace one or more backslashes with one backslash.
	$content = preg_replace("/\\\+/", "\\", $content);

	return $content;
}

function dbDelta($queries, $execute = true) {
	global $wpdb;

	// Seperate individual queries into an array
	if( !is_array($queries) ) {
		$queries = explode( ';', $queries );
		if('' == $queries[count($queries) - 1]) array_pop($queries);
	}

	$cqueries = array(); // Creation Queries
	$iqueries = array(); // Insertion Queries
	$for_update = array();

	// Create a tablename index for an array ($cqueries) of queries
	foreach($queries as $qry) {
		if(preg_match("|CREATE TABLE ([^ ]*)|", $qry, $matches)) {
			$cqueries[strtolower($matches[1])] = $qry;
			$for_update[$matches[1]] = 'Created table '.$matches[1];
		}
		else if(preg_match("|CREATE DATABASE ([^ ]*)|", $qry, $matches)) {
			array_unshift($cqueries, $qry);
		}
		else if(preg_match("|INSERT INTO ([^ ]*)|", $qry, $matches)) {
			$iqueries[] = $qry;
		}
		else if(preg_match("|UPDATE ([^ ]*)|", $qry, $matches)) {
			$iqueries[] = $qry;
		}
		else {
			// Unrecognized query type
		}
	}

	// Check to see which tables and fields exist
	if($tables = $wpdb->get_col('SHOW TABLES;')) {
		// For every table in the database
		foreach($tables as $table) {
			// If a table query exists for the database table...
			if( array_key_exists(strtolower($table), $cqueries) ) {
				// Clear the field and index arrays
				unset($cfields);
				unset($indices);
				// Get all of the field names in the query from between the parens
				preg_match("|\((.*)\)|ms", $cqueries[strtolower($table)], $match2);
				$qryline = trim($match2[1]);

				// Separate field lines into an array
				$flds = explode("\n", $qryline);

				//echo "<hr/><pre>\n".print_r(strtolower($table), true).":\n".print_r($cqueries, true)."</pre><hr/>";

				// For every field line specified in the query
				foreach($flds as $fld) {
					// Extract the field name
					preg_match("|^([^ ]*)|", trim($fld), $fvals);
					$fieldname = $fvals[1];

					// Verify the found field name
					$validfield = true;
					switch(strtolower($fieldname))
					{
					case '':
					case 'primary':
					case 'index':
					case 'fulltext':
					case 'unique':
					case 'key':
						$validfield = false;
						$indices[] = trim(trim($fld), ", \n");
						break;
					}
					$fld = trim($fld);

					// If it's a valid field, add it to the field array
					if($validfield) {
						$cfields[strtolower($fieldname)] = trim($fld, ", \n");
					}
				}

				// Fetch the table column structure from the database
				$tablefields = $wpdb->get_results("DESCRIBE {$table};");

				// For every field in the table
				foreach($tablefields as $tablefield) {
					// If the table field exists in the field array...
					if(array_key_exists(strtolower($tablefield->Field), $cfields)) {
						// Get the field type from the query
						preg_match("|".$tablefield->Field." ([^ ]*( unsigned)?)|i", $cfields[strtolower($tablefield->Field)], $matches);
						$fieldtype = $matches[1];

						// Is actual field type different from the field type in query?
						if($tablefield->Type != $fieldtype) {
							// Add a query to change the column type
							$cqueries[] = "ALTER TABLE {$table} CHANGE COLUMN {$tablefield->Field} " . $cfields[strtolower($tablefield->Field)];
							$for_update[$table.'.'.$tablefield->Field] = "Changed type of {$table}.{$tablefield->Field} from {$tablefield->Type} to {$fieldtype}";
						}

						// Get the default value from the array
							//echo "{$cfields[strtolower($tablefield->Field)]}<br>";
						if(preg_match("| DEFAULT '(.*)'|i", $cfields[strtolower($tablefield->Field)], $matches)) {
							$default_value = $matches[1];
							if($tablefield->Default != $default_value)
							{
								// Add a query to change the column's default value
								$cqueries[] = "ALTER TABLE {$table} ALTER COLUMN {$tablefield->Field} SET DEFAULT '{$default_value}'";
								$for_update[$table.'.'.$tablefield->Field] = "Changed default value of {$table}.{$tablefield->Field} from {$tablefield->Default} to {$default_value}";
							}
						}

						// Remove the field from the array (so it's not added)
						unset($cfields[strtolower($tablefield->Field)]);
					}
					else {
						// This field exists in the table, but not in the creation queries?
					}
				}

				// For every remaining field specified for the table
				foreach($cfields as $fieldname => $fielddef) {
					// Push a query line into $cqueries that adds the field to that table
					$cqueries[] = "ALTER TABLE {$table} ADD COLUMN $fielddef";
					$for_update[$table.'.'.$fieldname] = 'Added column '.$table.'.'.$fieldname;
				}

				// Index stuff goes here
				// Fetch the table index structure from the database
				$tableindices = $wpdb->get_results("SHOW INDEX FROM {$table};");

				if($tableindices) {
					// Clear the index array
					unset($index_ary);

					// For every index in the table
					foreach($tableindices as $tableindex) {
						// Add the index to the index data array
						$keyname = $tableindex->Key_name;
						$index_ary[$keyname]['columns'][] = array('fieldname' => $tableindex->Column_name, 'subpart' => $tableindex->Sub_part);
						$index_ary[$keyname]['unique'] = ($tableindex->Non_unique == 0)?true:false;
					}

					// For each actual index in the index array
					foreach($index_ary as $index_name => $index_data) {
						// Build a create string to compare to the query
						$index_string = '';
						if($index_name == 'PRIMARY') {
							$index_string .= 'PRIMARY ';
						}
						else if($index_data['unique']) {
							$index_string .= 'UNIQUE ';
						}
						$index_string .= 'KEY ';
						if($index_name != 'PRIMARY') {
							$index_string .= $index_name;
						}
						$index_columns = '';
						// For each column in the index
						foreach($index_data['columns'] as $column_data) {
							if($index_columns != '') $index_columns .= ',';
							// Add the field to the column list string
							$index_columns .= $column_data['fieldname'];
							if($column_data['subpart'] != '') {
								$index_columns .= '('.$column_data['subpart'].')';
							}
						}
						// Add the column list to the index create string
						$index_string .= ' ('.$index_columns.')';

						if(!(($aindex = array_search($index_string, $indices)) === false)) {
							unset($indices[$aindex]);
							//echo "<pre style=\"border:1px solid #ccc;margin-top:5px;\">{$table}:<br/>Found index:".$index_string."</pre>\n";
						}
						//else echo "<pre style=\"border:1px solid #ccc;margin-top:5px;\">{$table}:<br/><b>Did not find index:</b>".$index_string."<br/>".print_r($indices, true)."</pre>\n";
					}
				}

				// For every remaining index specified for the table
				foreach($indices as $index) {
					// Push a query line into $cqueries that adds the index to that table
					$cqueries[] = "ALTER TABLE {$table} ADD $index";
					$for_update[$table.'.'.$fieldname] = 'Added index '.$table.' '.$index;
				}

				// Remove the original table creation query from processing
				unset($cqueries[strtolower($table)]);
				unset($for_update[strtolower($table)]);
			} else {
				// This table exists in the database, but not in the creation queries?
			}
		}
	}

	$allqueries = array_merge($cqueries, $iqueries);
	if($execute) {
		foreach($allqueries as $query) {
			//echo "<pre style=\"border:1px solid #ccc;margin-top:5px;\">".print_r($query, true)."</pre>\n";
			$wpdb->query($query);
		}
	}

	return $for_update;
}

function make_db_current() {
	global $wp_queries;

	$alterations = dbDelta($wp_queries);
	echo "<ol>\n";
	foreach($alterations as $alteration) echo "<li>$alteration</li>\n";
	echo "</ol>\n";
}

function make_db_current_silent() {
	global $wp_queries;

	$alterations = dbDelta($wp_queries);
}

function make_site_theme_from_oldschool($theme_name, $template) {
	$home_path = get_home_path();
	$site_dir = ABSPATH . "wp-content/themes/$template";

	if (! file_exists("$home_path/index.php"))
		return false;

	// Copy files from the old locations to the site theme.
	// TODO: This does not copy arbitarary include dependencies.  Only the
	// standard WP files are copied.
	$files = array('index.php' => 'index.php', 'wp-layout.css' => 'style.css', 'wp-comments.php' => 'comments.php', 'wp-comments-popup.php' => 'comments-popup.php');

	foreach ($files as $oldfile => $newfile) {
		if ($oldfile == 'index.php')
			$oldpath = $home_path;
		else
			$oldpath = ABSPATH;

		if ($oldfile == 'index.php') { // Check to make sure it's not a new index
			$index = implode('', file("$oldpath/$oldfile"));
			if ( strstr( $index, 'WP_USE_THEMES' ) ) {
				if (! @copy(ABSPATH . 'wp-content/themes/default/index.php', "$site_dir/$newfile"))
					return false;
				continue; // Don't copy anything
				}
		}

		if (! @copy("$oldpath/$oldfile", "$site_dir/$newfile"))
			return false;

		chmod("$site_dir/$newfile", 0777);

		// Update the blog header include in each file.
		$lines = explode("\n", implode('', file("$site_dir/$newfile")));
		if ($lines) {
			$f = fopen("$site_dir/$newfile", 'w');

			foreach ($lines as $line) {
				if (preg_match('/require.*wp-blog-header/', $line))
					$line = '//' . $line;

				// Update stylesheet references.
				$line = str_replace("<?php echo __get_option('siteurl'); ?>/wp-layout.css", "<?php bloginfo('stylesheet_url'); ?>", $line);

				// Update comments template inclusion.
				$line = str_replace("<?php include(ABSPATH . 'wp-comments.php'); ?>", "<?php comments_template(); ?>", $line);

				fwrite($f, "{$line}\n");
			}
			fclose($f);
		}
	}

	// Add a theme header.
	$header = "/*\nTheme Name: $theme_name\nTheme URI: " . __get_option('siteurl') . "\nDescription: A theme automatically created by the upgrade.\nVersion: 1.0\nAuthor: Moi\n*/\n";

	$stylelines = file_get_contents("$site_dir/style.css");
	if ($stylelines) {
		$f = fopen("$site_dir/style.css", 'w');

		fwrite($f, $header);
		fwrite($f, $stylelines);
		fclose($f);
	}

	return true;
}

function make_site_theme_from_default($theme_name, $template) {
	$site_dir = ABSPATH . "wp-content/themes/$template";
	$default_dir = ABSPATH . 'wp-content/themes/default';

	// Copy files from the default theme to the site theme.
	//$files = array('index.php', 'comments.php', 'comments-popup.php', 'footer.php', 'header.php', 'sidebar.php', 'style.css');

	$theme_dir = @ dir("$default_dir");
	if ($theme_dir) {
		while(($theme_file = $theme_dir->read()) !== false) {
			if (is_dir("$default_dir/$theme_file"))
				continue;
			if (! @copy("$default_dir/$theme_file", "$site_dir/$theme_file"))
				return;
			chmod("$site_dir/$theme_file", 0777);
		}
	}

	// Rewrite the theme header.
	$stylelines = explode("\n", implode('', file("$site_dir/style.css")));
	if ($stylelines) {
		$f = fopen("$site_dir/style.css", 'w');

		foreach ($stylelines as $line) {
			if (strstr($line, "Theme Name:")) $line = "Theme Name: $theme_name";
			elseif (strstr($line, "Theme URI:")) $line = "Theme URI: " . __get_option('siteurl');
			elseif (strstr($line, "Description:")) $line = "Description: Your theme";
			elseif (strstr($line, "Version:")) $line = "Version: 1";
			elseif (strstr($line, "Author:")) $line = "Author: You";
			fwrite($f, "{$line}\n");
		}
		fclose($f);
	}

	// Copy the images.
	umask(0);
	if (! mkdir("$site_dir/images", 0777)) {
		return false;
	}

	$images_dir = @ dir("$default_dir/images");
	if ($images_dir) {
		while(($image = $images_dir->read()) !== false) {
			if (is_dir("$default_dir/images/$image"))
				continue;
			if (! @copy("$default_dir/images/$image", "$site_dir/images/$image"))
				return;
			chmod("$site_dir/images/$image", 0777);
		}
	}
}

// Create a site theme from the default theme.
function make_site_theme() {
	// Name the theme after the blog.
	$theme_name = __get_option('blogname');
	$template = sanitize_title($theme_name);
	$site_dir = ABSPATH . "wp-content/themes/$template";

	// If the theme already exists, nothing to do.
	if ( is_dir($site_dir)) {
		return false;
	}

	// We must be able to write to the themes dir.
	if (! is_writable(ABSPATH . "wp-content/themes")) {
		return false;
	}

	umask(0);
	if (! mkdir($site_dir, 0777)) {
		return false;
	}

	if (file_exists(ABSPATH . 'wp-layout.css')) {
		if (! make_site_theme_from_oldschool($theme_name, $template)) {
			// TODO:  rm -rf the site theme directory.
			return false;
		}
	} else {
		if (! make_site_theme_from_default($theme_name, $template))
			// TODO:  rm -rf the site theme directory.
			return false;
	}

	// Make the new site theme active.
	$current_template = __get_option('template');
	if ($current_template == 'default') {
		update_option('template', $template);
		update_option('stylesheet', $template);
	}
	return $template;
}

function translate_level_to_role($level) {
	switch ($level) {
	case 10:
	case 9:
	case 8:
		return 'administrator';
	case 7:
	case 6:
	case 5:
		return 'editor';
	case 4:
	case 3:
	case 2:
		return 'author';
	case 1:
		return 'contributor';
	case 0:
		return 'subscriber';
	}
}

?>