WordPress/wp-includes/ms-blogs.php

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<?php
/**
* Site/blog functions that work with the blogs table and related data.
*
* @package WordPress
* @subpackage Multisite
* @since MU
*/
/**
* Update the last_updated field for the current blog.
*
* @since MU
*/
function wpmu_update_blogs_date() {
global $wpdb;
update_blog_details( $wpdb->blogid, array('last_updated' => current_time('mysql', true)) );
do_action( 'wpmu_blog_updated', $wpdb->blogid );
}
/**
* Get a full blog URL, given a blog id.
*
* @since MU
*
* @param int $blog_id Blog ID
* @return string
*/
function get_blogaddress_by_id( $blog_id ) {
$bloginfo = get_blog_details( (int) $blog_id, false ); // only get bare details!
return esc_url( 'http://' . $bloginfo->domain . $bloginfo->path );
}
/**
* Get a full blog URL, given a blog name.
*
* @since MU
*
* @param string $blogname The (subdomain or directory) name
* @return string
*/
function get_blogaddress_by_name( $blogname ) {
global $current_site;
if ( is_subdomain_install() ) {
if ( $blogname == 'main' )
$blogname = 'www';
$url = rtrim( network_home_url(), '/' );
if ( !empty( $blogname ) )
$url = preg_replace( '|^([^\.]+://)|', '$1' . $blogname . '.', $url );
} else {
$url = network_home_url( $blogname );
}
return esc_url( $url . '/' );
}
/**
* Get a full blog URL, given a domain and a path.
*
* @since MU
*
* @param string $domain
* @param string $path
* @return string
*/
function get_blogaddress_by_domain( $domain, $path ) {
if ( is_subdomain_install() ) {
$url = "http://" . $domain.$path;
} else {
if ( $domain != $_SERVER['HTTP_HOST'] ) {
$blogname = substr( $domain, 0, strpos( $domain, '.' ) );
$url = 'http://' . substr( $domain, strpos( $domain, '.' ) + 1 ) . $path;
// we're not installing the main blog
if ( $blogname != 'www.' )
$url .= $blogname . '/';
} else { // main blog
$url = 'http://' . $domain . $path;
}
}
return esc_url( $url );
}
/**
* Given a blog's (subdomain or directory) name, retrieve it's id.
*
* @since MU
*
* @param string $name
* @return int A blog id
*/
function get_id_from_blogname( $name ) {
global $wpdb, $current_site;
$blog_id = wp_cache_get( 'get_id_from_blogname_' . $name, 'blog-details' );
if ( $blog_id )
return $blog_id;
if ( is_subdomain_install() ) {
$domain = $name . '.' . $current_site->domain;
$path = $current_site->path;
} else {
$domain = $current_site->domain;
$path = $current_site->path . $name . '/';
}
$blog_id = $wpdb->get_var( $wpdb->prepare("SELECT blog_id FROM {$wpdb->blogs} WHERE domain = %s AND path = %s", $domain, $path) );
wp_cache_set( 'get_id_from_blogname_' . $name, $blog_id, 'blog-details' );
return $blog_id;
}
/**
* Retrieve the details for a blog from the blogs table and blog options.
*
* @since MU
*
* @param int|string|array $fields A blog ID, a blog name, or an array of fields to query against.
* @param bool $get_all Whether to retrieve all details or only the details in the blogs table. Default is true.
* @return object Blog details.
*/
function get_blog_details( $fields, $get_all = true ) {
global $wpdb;
if ( is_array($fields ) ) {
if ( isset($fields['blog_id']) ) {
$blog_id = $fields['blog_id'];
} elseif ( isset($fields['domain']) && isset($fields['path']) ) {
$key = md5( $fields['domain'] . $fields['path'] );
$blog = wp_cache_get($key, 'blog-lookup');
if ( false !== $blog )
return $blog;
if ( substr( $fields['domain'], 0, 4 ) == 'www.' ) {
$nowww = substr( $fields['domain'], 4 );
$blog = $wpdb->get_row( $wpdb->prepare( "SELECT * FROM $wpdb->blogs WHERE domain IN (%s,%s) AND path = %s ORDER BY CHAR_LENGTH(domain) DESC", $nowww, $fields['domain'], $fields['path'] ) );
} else {
$blog = $wpdb->get_row( $wpdb->prepare( "SELECT * FROM $wpdb->blogs WHERE domain = %s AND path = %s", $fields['domain'], $fields['path'] ) );
}
if ( $blog ) {
wp_cache_set($blog->blog_id . 'short', $blog, 'blog-details');
$blog_id = $blog->blog_id;
} else {
return false;
}
} elseif ( isset($fields['domain']) && is_subdomain_install() ) {
$key = md5( $fields['domain'] );
$blog = wp_cache_get($key, 'blog-lookup');
if ( false !== $blog )
return $blog;
if ( substr( $fields['domain'], 0, 4 ) == 'www.' ) {
$nowww = substr( $fields['domain'], 4 );
$blog = $wpdb->get_row( $wpdb->prepare( "SELECT * FROM $wpdb->blogs WHERE domain IN (%s,%s) ORDER BY CHAR_LENGTH(domain) DESC", $nowww, $fields['domain'] ) );
} else {
$blog = $wpdb->get_row( $wpdb->prepare( "SELECT * FROM $wpdb->blogs WHERE domain = %s", $fields['domain'] ) );
}
if ( $blog ) {
wp_cache_set($blog->blog_id . 'short', $blog, 'blog-details');
$blog_id = $blog->blog_id;
} else {
return false;
}
} else {
return false;
}
} else {
if ( !is_numeric( $fields ) )
$blog_id = get_id_from_blogname( $fields );
else
$blog_id = $fields;
}
$blog_id = (int) $blog_id;
$all = $get_all == true ? '' : 'short';
$details = wp_cache_get( $blog_id . $all, 'blog-details' );
if ( $details ) {
if ( ! is_object( $details ) ) {
if ( $details == -1 ) {
return false;
} else {
// Clear old pre-serialized objects. Cache clients do better with that.
wp_cache_delete( $blog_id . $all, 'blog-details' );
unset($details);
}
} else {
return $details;
}
}
// Try the other cache.
if ( $get_all ) {
$details = wp_cache_get( $blog_id . 'short', 'blog-details' );
} else {
$details = wp_cache_get( $blog_id, 'blog-details' );
// If short was requested and full cache is set, we can return.
if ( $details ) {
if ( ! is_object( $details ) ) {
if ( $details == -1 ) {
return false;
} else {
// Clear old pre-serialized objects. Cache clients do better with that.
wp_cache_delete( $blog_id, 'blog-details' );
unset($details);
}
} else {
return $details;
}
}
}
if ( empty($details) ) {
$details = $wpdb->get_row( $wpdb->prepare( "SELECT * FROM $wpdb->blogs WHERE blog_id = %d /* get_blog_details */", $blog_id ) );
if ( ! $details ) {
// Set the full cache.
wp_cache_set( $blog_id, -1, 'blog-details' );
return false;
}
}
if ( ! $get_all ) {
wp_cache_set( $blog_id . $all, $details, 'blog-details' );
return $details;
}
$details->blogname = get_blog_option( $blog_id, 'blogname' );
$details->siteurl = get_blog_option( $blog_id, 'siteurl' );
$details->post_count = get_blog_option( $blog_id, 'post_count' );
$details = apply_filters( 'blog_details', $details );
wp_cache_set( $blog_id . $all, $details, 'blog-details' );
$key = md5( $details->domain . $details->path );
wp_cache_set( $key, $details, 'blog-lookup' );
return $details;
}
/**
* Clear the blog details cache.
*
* @since MU
*
* @param int $blog_id Blog ID
*/
function refresh_blog_details( $blog_id ) {
$blog_id = (int) $blog_id;
$details = get_blog_details( $blog_id, false );
wp_cache_delete( $blog_id , 'blog-details' );
wp_cache_delete( $blog_id . 'short' , 'blog-details' );
wp_cache_delete( md5( $details->domain . $details->path ) , 'blog-lookup' );
wp_cache_delete( 'current_blog_' . $details->domain, 'site-options' );
wp_cache_delete( 'current_blog_' . $details->domain . $details->path, 'site-options' );
do_action( 'refresh_blog_details', $blog_id );
}
/**
* Update the details for a blog. Updates the blogs table for a given blog id.
*
* @since MU
*
* @param int $blog_id Blog ID
* @param array $details Array of details keyed by blogs table field names.
* @return bool True if update succeeds, false otherwise.
*/
function update_blog_details( $blog_id, $details = array() ) {
global $wpdb;
if ( empty($details) )
return false;
if ( is_object($details) )
$details = get_object_vars($details);
$current_details = get_blog_details($blog_id, false);
if ( empty($current_details) )
return false;
$current_details = get_object_vars($current_details);
$details = array_merge($current_details, $details);
$details['last_updated'] = current_time('mysql', true);
$update_details = array();
$fields = array( 'site_id', 'domain', 'path', 'registered', 'last_updated', 'public', 'archived', 'mature', 'spam', 'deleted', 'lang_id');
foreach ( array_intersect( array_keys( $details ), $fields ) as $field )
$update_details[$field] = $details[$field];
$wpdb->update( $wpdb->blogs, $update_details, array('blog_id' => $blog_id) );
// If spam status changed, issue actions.
if ( $details[ 'spam' ] != $current_details[ 'spam' ] ) {
if ( $details[ 'spam' ] == 1 )
do_action( "make_spam_blog", $blog_id );
else
do_action( "make_ham_blog", $blog_id );
}
if ( isset($details[ 'public' ]) )
update_blog_option( $blog_id, 'blog_public', $details[ 'public' ] );
refresh_blog_details($blog_id);
return true;
}
/**
* Retrieve option value for a given blog id based on name of option.
*
* If the option does not exist or does not have a value, then the return value
* will be false. This is useful to check whether you need to install an option
* and is commonly used during installation of plugin options and to test
* whether upgrading is required.
*
* If the option was serialized then it will be unserialized when it is returned.
*
* @since MU
*
* @param int $id A blog ID. Can be null to refer to the current blog.
* @param string $option Name of option to retrieve. Expected to not be SQL-escaped.
* @param mixed $default Optional. Default value to return if the option does not exist.
* @return mixed Value set for the option.
*/
function get_blog_option( $id, $option, $default = false ) {
$id = (int) $id;
if ( empty( $id ) )
$id = get_current_blog_id();
if ( get_current_blog_id() == $id )
return get_option( $option, $default );
switch_to_blog( $id );
$option = get_option( $option, $default );
restore_current_blog();
return $option;
}
/**
* Add a new option for a given blog id.
*
* You do not need to serialize values. If the value needs to be serialized, then
* it will be serialized before it is inserted into the database. Remember,
* resources can not be serialized or added as an option.
*
* You can create options without values and then update the values later.
* Existing options will not be updated and checks are performed to ensure that you
* aren't adding a protected WordPress option. Care should be taken to not name
* options the same as the ones which are protected.
*
* @since MU
*
* @param int $id A blog ID. Can be null to refer to the current blog.
* @param string $option Name of option to add. Expected to not be SQL-escaped.
* @param mixed $value Optional. Option value, can be anything. Expected to not be SQL-escaped.
* @return bool False if option was not added and true if option was added.
*/
function add_blog_option( $id, $option, $value ) {
$id = (int) $id;
if ( empty( $id ) )
$id = get_current_blog_id();
if ( get_current_blog_id() == $id )
return add_option( $option, $value );
switch_to_blog( $id );
$return = add_option( $option, $value );
restore_current_blog();
return $return;
}
/**
* Removes option by name for a given blog id. Prevents removal of protected WordPress options.
*
* @since MU
*
* @param int $id A blog ID. Can be null to refer to the current blog.
* @param string $option Name of option to remove. Expected to not be SQL-escaped.
* @return bool True, if option is successfully deleted. False on failure.
*/
function delete_blog_option( $id, $option ) {
$id = (int) $id;
if ( empty( $id ) )
$id = get_current_blog_id();
if ( get_current_blog_id() == $id )
return delete_option( $option );
switch_to_blog( $id );
$return = delete_option( $option );
restore_current_blog();
return $return;
}
/**
* Update an option for a particular blog.
*
* @since MU
*
* @param int $id The blog id
* @param string $option The option key
* @param mixed $value The option value
* @return bool True on success, false on failrue.
*/
function update_blog_option( $id, $option, $value, $deprecated = null ) {
$id = (int) $id;
if ( null !== $deprecated )
_deprecated_argument( __FUNCTION__, '3.1' );
if ( get_current_blog_id() == $id )
return update_option( $option, $value );
switch_to_blog( $id );
$return = update_option( $option, $value );
restore_current_blog();
refresh_blog_details( $id );
return $return;
}
/**
* Switch the current blog.
*
* This function is useful if you need to pull posts, or other information,
* from other blogs. You can switch back afterwards using restore_current_blog().
*
* Things that aren't switched:
* - autoloaded options. See #14992
* - plugins. See #14941
*
* @see restore_current_blog()
* @since MU
*
* @param int $new_blog The id of the blog you want to switch to. Default: current blog
* @param bool $validate Whether to check if $new_blog exists before proceeding
* @return bool True on success, False if the validation failed
*/
function switch_to_blog( $new_blog, $validate = false ) {
global $wpdb, $table_prefix, $blog_id, $switched, $switched_stack, $wp_roles, $wp_object_cache;
if ( empty($new_blog) )
$new_blog = $blog_id;
if ( $validate && ! get_blog_details( $new_blog ) )
return false;
if ( empty($switched_stack) )
$switched_stack = array();
$switched_stack[] = $blog_id;
/* If we're switching to the same blog id that we're on,
* set the right vars, do the associated actions, but skip
* the extra unnecessary work */
if ( $blog_id == $new_blog ) {
do_action( 'switch_blog', $blog_id, $blog_id );
$switched = true;
return true;
}
$wpdb->set_blog_id($new_blog);
$table_prefix = $wpdb->prefix;
$prev_blog_id = $blog_id;
$blog_id = $new_blog;
if ( is_object( $wp_roles ) ) {
$wpdb->suppress_errors();
if ( method_exists( $wp_roles ,'_init' ) )
$wp_roles->_init();
elseif ( method_exists( $wp_roles, '__construct' ) )
$wp_roles->__construct();
$wpdb->suppress_errors( false );
}
if ( did_action('init') ) {
$current_user = wp_get_current_user();
if ( is_object( $current_user ) )
$current_user->for_blog( $blog_id );
}
if ( function_exists( 'wp_cache_switch_to_blog' ) ) {
wp_cache_switch_to_blog( $blog_id );
} else {
if ( is_object( $wp_object_cache ) && isset( $wp_object_cache->global_groups ) )
$global_groups = $wp_object_cache->global_groups;
else
$global_groups = false;
wp_cache_init();
if ( function_exists('wp_cache_add_global_groups') ) {
if ( is_array( $global_groups ) )
wp_cache_add_global_groups( $global_groups );
else
wp_cache_add_global_groups( array( 'users', 'userlogins', 'usermeta', 'user_meta', 'site-transient', 'site-options', 'site-lookup', 'blog-lookup', 'blog-details', 'rss', 'global-posts' ) );
wp_cache_add_non_persistent_groups(array( 'comment', 'counts', 'plugins' ));
}
}
do_action('switch_blog', $blog_id, $prev_blog_id);
$switched = true;
return true;
}
/**
* Restore the current blog, after calling switch_to_blog()
*
* @see switch_to_blog()
* @since MU
*
* @return bool True on success, False if we're already on the current blog
*/
function restore_current_blog() {
global $table_prefix, $wpdb, $blog_id, $switched, $switched_stack, $wp_roles, $wp_object_cache;
if ( !$switched )
return false;
if ( !is_array( $switched_stack ) )
return false;
$blog = array_pop( $switched_stack );
if ( $blog_id == $blog ) {
do_action( 'switch_blog', $blog, $blog );
/* If we still have items in the switched stack, consider ourselves still 'switched' */
$switched = ( is_array( $switched_stack ) && count( $switched_stack ) > 0 );
return true;
}
$wpdb->set_blog_id($blog);
$prev_blog_id = $blog_id;
$blog_id = $blog;
$table_prefix = $wpdb->prefix;
if ( is_object( $wp_roles ) ) {
$wpdb->suppress_errors();
if ( method_exists( $wp_roles ,'_init' ) )
$wp_roles->_init();
elseif ( method_exists( $wp_roles, '__construct' ) )
$wp_roles->__construct();
$wpdb->suppress_errors( false );
}
if ( did_action('init') ) {
$current_user = wp_get_current_user();
if ( is_object( $current_user ) )
$current_user->for_blog( $blog_id );
}
if ( function_exists( 'wp_cache_switch_to_blog' ) ) {
wp_cache_switch_to_blog( $blog_id );
} else {
if ( is_object( $wp_object_cache ) && isset( $wp_object_cache->global_groups ) )
$global_groups = $wp_object_cache->global_groups;
else
$global_groups = false;
wp_cache_init();
if ( function_exists('wp_cache_add_global_groups') ) {
if ( is_array( $global_groups ) )
wp_cache_add_global_groups( $global_groups );
else
wp_cache_add_global_groups( array( 'users', 'userlogins', 'usermeta', 'user_meta', 'site-transient', 'site-options', 'site-lookup', 'blog-lookup', 'blog-details', 'rss', 'global-posts' ) );
wp_cache_add_non_persistent_groups(array( 'comment', 'counts', 'plugins' ));
}
}
do_action('switch_blog', $blog_id, $prev_blog_id);
/* If we still have items in the switched stack, consider ourselves still 'switched' */
$switched = ( is_array( $switched_stack ) && count( $switched_stack ) > 0 );
return true;
}
/**
* Check if a particular blog is archived.
*
* @since MU
*
* @param int $id The blog id
* @return string Whether the blog is archived or not
*/
function is_archived( $id ) {
return get_blog_status($id, 'archived');
}
/**
* Update the 'archived' status of a particular blog.
*
* @since MU
*
* @param int $id The blog id
* @param string $archived The new status
* @return string $archived
*/
function update_archived( $id, $archived ) {
update_blog_status($id, 'archived', $archived);
return $archived;
}
/**
* Update a blog details field.
*
* @since MU
*
* @param int $blog_id BLog ID
* @param string $pref A field name
* @param string $value Value for $pref
* @return string $value
*/
function update_blog_status( $blog_id, $pref, $value, $deprecated = null ) {
global $wpdb;
if ( null !== $deprecated )
_deprecated_argument( __FUNCTION__, '3.1' );
if ( !in_array( $pref, array( 'site_id', 'domain', 'path', 'registered', 'last_updated', 'public', 'archived', 'mature', 'spam', 'deleted', 'lang_id') ) )
return $value;
$wpdb->update( $wpdb->blogs, array($pref => $value, 'last_updated' => current_time('mysql', true)), array('blog_id' => $blog_id) );
refresh_blog_details($blog_id);
if ( 'spam' == $pref )
( $value == 1 ) ? do_action( 'make_spam_blog', $blog_id ) : do_action( 'make_ham_blog', $blog_id );
elseif ( 'mature' == $pref )
( $value == 1 ) ? do_action( 'mature_blog', $blog_id ) : do_action( 'unmature_blog', $blog_id );
elseif ( 'archived' == $pref )
( $value == 1 ) ? do_action( 'archive_blog', $blog_id ) : do_action( 'unarchive_blog', $blog_id );
elseif ( 'archived' == $pref )
( $value == 1 ) ? do_action( 'archive_blog', $blog_id ) : do_action( 'unarchive_blog', $blog_id );
return $value;
}
/**
* Get a blog details field.
*
* @since MU
*
* @param int $id The blog id
* @param string $pref A field name
* @return bool $value
*/
function get_blog_status( $id, $pref ) {
global $wpdb;
$details = get_blog_details( $id, false );
if ( $details )
return $details->$pref;
return $wpdb->get_var( $wpdb->prepare("SELECT %s FROM {$wpdb->blogs} WHERE blog_id = %d", $pref, $id) );
}
/**
* Get a list of most recently updated blogs.
*
* @since MU
*
* @param mixed $deprecated Not used
* @param int $start The offset
* @param int $quantity The maximum number of blogs to retrieve. Default is 40.
* @return array The list of blogs
*/
function get_last_updated( $deprecated = '', $start = 0, $quantity = 40 ) {
global $wpdb;
if ( ! empty( $deprecated ) )
_deprecated_argument( __FUNCTION__, 'MU' ); // never used
return $wpdb->get_results( $wpdb->prepare("SELECT blog_id, domain, path FROM $wpdb->blogs WHERE site_id = %d AND public = '1' AND archived = '0' AND mature = '0' AND spam = '0' AND deleted = '0' AND last_updated != '0000-00-00 00:00:00' ORDER BY last_updated DESC limit %d, %d", $wpdb->siteid, $start, $quantity ) , ARRAY_A );
}
/**
* Handler for updating the blog date when a post is published or an already published post is changed.
*
* @since 3.3.0
*
* @param string $new_status The new post status
* @param string $old_status The old post status
* @param object $post Post object
*/
function _update_blog_date_on_post_publish( $new_status, $old_status, $post ) {
$post_type_obj = get_post_type_object( $post->post_type );
if ( ! $post_type_obj->public )
return;
if ( 'publish' != $new_status && 'publish' != $old_status )
return;
// Post was freshly published, published post was saved, or published post was unpublished.
wpmu_update_blogs_date();
}
/**
* Handler for updating the blog date when a published post is deleted.
*
* @since 3.4.0
*
* @param int $post_id Post ID
*/
function _update_blog_date_on_post_delete( $post_id ) {
$post = get_post( $post_id );
$post_type_obj = get_post_type_object( $post->post_type );
if ( ! $post_type_obj->public )
return;
if ( 'publish' != $post->post_status )
return;
wpmu_update_blogs_date();
}