X-Git-Url: https://scripts.mit.edu/gitweb/autoinstalls/wordpress.git/blobdiff_plain/76aea3697c6043c1613370f172395b4f65ee71f0..11be8dc178e77d0b46189bbd8e33a216a9b90942:/wp-admin/includes/plugin.php diff --git a/wp-admin/includes/plugin.php b/wp-admin/includes/plugin.php index aca52420..0210c5ef 100644 --- a/wp-admin/includes/plugin.php +++ b/wp-admin/includes/plugin.php @@ -1,44 +1,173 @@ + * /* + * Plugin Name: Name of Plugin + * Plugin URI: Link to plugin information + * Description: Plugin Description + * Author: Plugin author's name + * Author URI: Link to the author's web site + * Version: Must be set in the plugin for WordPress 2.3+ + * Text Domain: Optional. Unique identifier, should be same as the one used in + * plugin_text_domain() + * Domain Path: Optional. Only useful if the translations are located in a + * folder above the plugin's base path. For example, if .mo files are + * located in the locale folder then Domain Path will be "/locale/" and + * must have the first slash. Defaults to the base folder the plugin is + * located in. + * * / # Remove the space to close comment + * + * + * Plugin data returned array contains the following: + * 'Name' - Name of the plugin, must be unique. + * 'Title' - Title of the plugin and the link to the plugin's web site. + * 'Description' - Description of what the plugin does and/or notes + * from the author. + * 'Author' - The author's name + * 'AuthorURI' - The authors web site address. + * 'Version' - The plugin version number. + * 'PluginURI' - Plugin web site address. + * 'TextDomain' - Plugin's text domain for localization. + * 'DomainPath' - Plugin's relative directory path to .mo files. + * + * Some users have issues with opening large files and manipulating the contents + * for want is usually the first 1kiB or 2kiB. This function stops pulling in + * the plugin contents when it has all of the required plugin data. + * + * The first 8kiB of the file will be pulled in and if the plugin data is not + * within that first 8kiB, then the plugin author should correct their plugin + * and move the plugin data headers to the top. + * + * The plugin file is assumed to have permissions to allow for scripts to read + * the file. This is not checked however and the file is only opened for + * reading. + * + * @link http://trac.wordpress.org/ticket/5651 Previous Optimizations. + * @link http://trac.wordpress.org/ticket/7372 Further and better Optimizations. + * @since 1.5.0 + * + * @param string $plugin_file Path to the plugin file + * @param bool $markup If the returned data should have HTML markup applied + * @param bool $translate If the returned data should be translated + * @return array See above for description. + */ +function get_plugin_data( $plugin_file, $markup = true, $translate = true ) { + // We don't need to write to the file, so just open for reading. + $fp = fopen($plugin_file, 'r'); + + // Pull only the first 8kiB of the file in. + $plugin_data = fread( $fp, 8192 ); + + // PHP will close file handle, but we are good citizens. + fclose($fp); + + preg_match( '|Plugin Name:(.*)$|mi', $plugin_data, $name ); + preg_match( '|Plugin URI:(.*)$|mi', $plugin_data, $uri ); + preg_match( '|Version:(.*)|i', $plugin_data, $version ); preg_match( '|Description:(.*)$|mi', $plugin_data, $description ); preg_match( '|Author:(.*)$|mi', $plugin_data, $author_name ); preg_match( '|Author URI:(.*)$|mi', $plugin_data, $author_uri ); + preg_match( '|Text Domain:(.*)$|mi', $plugin_data, $text_domain ); + preg_match( '|Domain Path:(.*)$|mi', $plugin_data, $domain_path ); - if ( preg_match( "|Version:(.*)|i", $plugin_data, $version )) - $version = trim( $version[1] ); - else - $version = ''; + foreach ( array( 'name', 'uri', 'version', 'description', 'author_name', 'author_uri', 'text_domain', 'domain_path' ) as $field ) { + if ( !empty( ${$field} ) ) + ${$field} = trim(${$field}[1]); + else + ${$field} = ''; + } - $description = wptexturize( trim( $description[1] )); + $plugin_data = array( + 'Name' => $name, 'Title' => $name, 'PluginURI' => $uri, 'Description' => $description, + 'Author' => $author_name, 'AuthorURI' => $author_uri, 'Version' => $version, + 'TextDomain' => $text_domain, 'DomainPath' => $domain_path + ); + if ( $markup || $translate ) + $plugin_data = _get_plugin_data_markup_translate($plugin_data, $markup, $translate); + return $plugin_data; +} + +function _get_plugin_data_markup_translate($plugin_data, $markup = true, $translate = true) { + + //Translate fields + if( $translate && ! empty($plugin_data['TextDomain']) ) { + if( ! empty( $plugin_data['DomainPath'] ) ) + load_plugin_textdomain($plugin_data['TextDomain'], dirname($plugin_file). $plugin_data['DomainPath']); + else + load_plugin_textdomain($plugin_data['TextDomain'], dirname($plugin_file)); - $name = $plugin_name[1]; - $name = trim( $name ); - $plugin = $name; - if ('' != trim($plugin_uri[1]) && '' != $name ) { - $plugin = ''.$plugin.''; + foreach ( array('Name', 'PluginURI', 'Description', 'Author', 'AuthorURI', 'Version') as $field ) + $plugin_data[ $field ] = translate($plugin_data[ $field ], $plugin_data['TextDomain']); } - if ('' == $author_uri[1] ) { - $author = trim( $author_name[1] ); - } else { - $author = '' . trim( $author_name[1] ) . ''; + //Apply Markup + if ( $markup ) { + if ( ! empty($plugin_data['PluginURI']) && ! empty($plugin_data['Name']) ) + $plugin_data['Title'] = '' . $plugin_data['Name'] . ''; + else + $plugin_data['Title'] = $plugin_data['Name']; + + if ( ! empty($plugin_data['AuthorURI']) && ! empty($plugin_data['Author']) ) + $plugin_data['Author'] = '' . $plugin_data['Author'] . ''; + + $plugin_data['Description'] = wptexturize( $plugin_data['Description'] ); + if( ! empty($plugin_data['Author']) ) + $plugin_data['Description'] .= ' ' . sprintf( __('By %s'), $plugin_data['Author'] ) . '.'; } - return array('Name' => $name, 'Title' => $plugin, 'Description' => $description, 'Author' => $author, 'Version' => $version); + $plugins_allowedtags = array('a' => array('href' => array(),'title' => array()),'abbr' => array('title' => array()),'acronym' => array('title' => array()),'code' => array(),'em' => array(),'strong' => array()); + + // Sanitize all displayed data + $plugin_data['Title'] = wp_kses($plugin_data['Title'], $plugins_allowedtags); + $plugin_data['Version'] = wp_kses($plugin_data['Version'], $plugins_allowedtags); + $plugin_data['Description'] = wp_kses($plugin_data['Description'], $plugins_allowedtags); + $plugin_data['Author'] = wp_kses($plugin_data['Author'], $plugins_allowedtags); + + return $plugin_data; } +/** + * Check the plugins directory and retrieve all plugin files with plugin data. + * + * WordPress only supports plugin files in the base plugins directory + * (wp-content/plugins) and in one directory above the plugins directory + * (wp-content/plugins/my-plugin). The file it looks for has the plugin data and + * must be found in those two locations. It is recommended that do keep your + * plugin files in directories. + * + * The file with the plugin data is the file that will be included and therefore + * needs to have the main execution for the plugin. This does not mean + * everything must be contained in the file and it is recommended that the file + * be split for maintainability. Keep everything in one file for extreme + * optimization purposes. + * + * @since unknown + * + * @param string $plugin_folder Optional. Relative path to single plugin folder. + * @return array Key is the plugin file path and the value is an array of the plugin data. + */ function get_plugins($plugin_folder = '') { - + if ( ! $cache_plugins = wp_cache_get('plugins', 'plugins') ) $cache_plugins = array(); - + if ( isset($cache_plugins[ $plugin_folder ]) ) return $cache_plugins[ $plugin_folder ]; - + $wp_plugins = array (); $plugin_root = WP_PLUGIN_DIR; if( !empty($plugin_folder) ) @@ -76,7 +205,7 @@ function get_plugins($plugin_folder = '') { if ( !is_readable( "$plugin_root/$plugin_file" ) ) continue; - $plugin_data = get_plugin_data( "$plugin_root/$plugin_file" ); + $plugin_data = get_plugin_data( "$plugin_root/$plugin_file", false, false ); //Do not apply markup/translate as it'll be cached. if ( empty ( $plugin_data['Name'] ) ) continue; @@ -86,39 +215,82 @@ function get_plugins($plugin_folder = '') { uasort( $wp_plugins, create_function( '$a, $b', 'return strnatcasecmp( $a["Name"], $b["Name"] );' )); - $cache_plugins[ $plugin_folder ] = $wp_plugins; - wp_cache_set('plugins', $cache_plugins, 'plugins'); + $cache_plugins[ $plugin_folder ] = $wp_plugins; + wp_cache_set('plugins', $cache_plugins, 'plugins'); return $wp_plugins; } -function is_plugin_active($plugin){ +/** + * Check whether the plugin is active by checking the active_plugins list. + * + * @since 2.5.0 + * + * @param string $plugin Base plugin path from plugins directory. + * @return bool True, if in the active plugins list. False, not in the list. + */ +function is_plugin_active($plugin) { return in_array($plugin, get_option('active_plugins')); } +/** + * Attempts activation of plugin in a "sandbox" and redirects on success. + * + * A plugin that is already activated will not attempt to be activated again. + * + * The way it works is by setting the redirection to the error before trying to + * include the plugin file. If the plugin fails, then the redirection will not + * be overwritten with the success message. Also, the options will not be + * updated and the activation hook will not be called on plugin error. + * + * It should be noted that in no way the below code will actually prevent errors + * within the file. The code should not be used elsewhere to replicate the + * "sandbox", which uses redirection to work. + * {@source 13 1} + * + * If any errors are found or text is outputted, then it will be captured to + * ensure that the success redirection will update the error redirection. + * + * @since unknown + * + * @param string $plugin Plugin path to main plugin file with plugin data. + * @param string $redirect Optional. URL to redirect to. + * @return WP_Error|null WP_Error on invalid file or null on success. + */ function activate_plugin($plugin, $redirect = '') { - $current = get_option('active_plugins'); - $plugin = trim($plugin); - - $valid = validate_plugin($plugin); - if ( is_wp_error($valid) ) - return $valid; - - if ( !in_array($plugin, $current) ) { - if ( !empty($redirect) ) - wp_redirect(add_query_arg('_error_nonce', wp_create_nonce('plugin-activation-error_' . $plugin), $redirect)); // we'll override this later if the plugin can be included without fatal error - ob_start(); - @include(WP_PLUGIN_DIR . '/' . $plugin); - $current[] = $plugin; - sort($current); - update_option('active_plugins', $current); - do_action('activate_' . $plugin); - ob_end_clean(); - } + $current = get_option('active_plugins'); + $plugin = plugin_basename(trim($plugin)); - return null; + $valid = validate_plugin($plugin); + if ( is_wp_error($valid) ) + return $valid; + + if ( !in_array($plugin, $current) ) { + if ( !empty($redirect) ) + wp_redirect(add_query_arg('_error_nonce', wp_create_nonce('plugin-activation-error_' . $plugin), $redirect)); // we'll override this later if the plugin can be included without fatal error + ob_start(); + @include(WP_PLUGIN_DIR . '/' . $plugin); + $current[] = $plugin; + sort($current); + update_option('active_plugins', $current); + do_action('activate_' . $plugin); + ob_end_clean(); + } + + return null; } +/** + * Deactivate a single plugin or multiple plugins. + * + * The deactivation hook is disabled by the plugin upgrader by using the $silent + * parameter. + * + * @since unknown + * + * @param string|array $plugins Single plugin or list of plugins to deactivate. + * @param bool $silent Optional, default is false. Prevent calling deactivate hook. + */ function deactivate_plugins($plugins, $silent= false) { $current = get_option('active_plugins'); @@ -126,6 +298,7 @@ function deactivate_plugins($plugins, $silent= false) { $plugins = array($plugins); foreach ( $plugins as $plugin ) { + $plugin = plugin_basename($plugin); if( ! is_plugin_active($plugin) ) continue; array_splice($current, array_search( $plugin, $current), 1 ); // Fixed Array-fu! @@ -136,6 +309,20 @@ function deactivate_plugins($plugins, $silent= false) { update_option('active_plugins', $current); } +/** + * Activate multiple plugins. + * + * When WP_Error is returned, it does not mean that one of the plugins had + * errors. It means that one or more of the plugins file path was invalid. + * + * The execution will be halted as soon as one of the plugins has an error. + * + * @since unknown + * + * @param string|array $plugins + * @param string $redirect Redirect to page after successful activation. + * @return bool|WP_Error True when finished or WP_Error if there were errors during a plugin activation. + */ function activate_plugins($plugins, $redirect = '') { if ( !is_array($plugins) ) $plugins = array($plugins); @@ -155,6 +342,18 @@ function activate_plugins($plugins, $redirect = '') { return true; } +/** + * Remove directory and files of a plugin for a single or list of plugin(s). + * + * If the plugins parameter list is empty, false will be returned. True when + * completed. + * + * @since unknown + * + * @param array $plugins List of plugin + * @param string $redirect Redirect to page when complete. + * @return mixed + */ function delete_plugins($plugins, $redirect = '' ) { global $wp_filesystem; @@ -206,26 +405,33 @@ function delete_plugins($plugins, $redirect = '' ) { $plugins_dir = $wp_filesystem->wp_plugins_dir(); if ( empty($plugins_dir) ) return new WP_Error('fs_no_plugins_dir', __('Unable to locate WordPress Plugin directory.')); - + $plugins_dir = trailingslashit( $plugins_dir ); $errors = array(); foreach( $plugins as $plugin_file ) { + // Run Uninstall hook + if ( is_uninstallable_plugin( $plugin_file ) ) + uninstall_plugin($plugin_file); + $this_plugin_dir = trailingslashit( dirname($plugins_dir . $plugin_file) ); // If plugin is in its own directory, recursively delete the directory. if ( strpos($plugin_file, '/') && $this_plugin_dir != $plugins_dir ) //base check on if plugin includes directory seperator AND that its not the root plugin folder $deleted = $wp_filesystem->delete($this_plugin_dir, true); else $deleted = $wp_filesystem->delete($plugins_dir . $plugin_file); - + if ( ! $deleted ) $errors[] = $plugin_file; } - - if( ! empty($errors) ) + + if ( ! empty($errors) ) return new WP_Error('could_not_remove_plugin', sprintf(__('Could not fully remove the plugin(s) %s'), implode(', ', $errors)) ); - + + // Force refresh of plugin update information + delete_option('update_plugins'); + return true; } @@ -240,7 +446,7 @@ function validate_active_plugins() { } //Invalid is any plugin that is deactivated due to error. - $invalid = array(); + $invalid = array(); // If a plugin file does not exist, remove it from the list of active // plugins. @@ -254,25 +460,109 @@ function validate_active_plugins() { return $invalid; } +/** + * Validate the plugin path. + * + * Checks that the file exists and {@link validate_file() is valid file}. + * + * @since unknown + * + * @param string $plugin Plugin Path + * @return WP_Error|int 0 on success, WP_Error on failure. + */ function validate_plugin($plugin) { if ( validate_file($plugin) ) - return new WP_Error('plugin_invalid', __('Invalid plugin.')); + return new WP_Error('plugin_invalid', __('Invalid plugin path.')); if ( ! file_exists(WP_PLUGIN_DIR . '/' . $plugin) ) return new WP_Error('plugin_not_found', __('Plugin file does not exist.')); return 0; } +/** + * Whether the plugin can be uninstalled. + * + * @since 2.7.0 + * + * @param string $plugin Plugin path to check. + * @return bool Whether plugin can be uninstalled. + */ +function is_uninstallable_plugin($plugin) { + $file = plugin_basename($plugin); + + $uninstallable_plugins = (array) get_option('uninstall_plugins'); + if ( isset( $uninstallable_plugins[$file] ) || file_exists( WP_PLUGIN_DIR . '/' . dirname($file) . '/uninstall.php' ) ) + return true; + + return false; +} + +/** + * Uninstall a single plugin. + * + * Calls the uninstall hook, if it is available. + * + * @since 2.7.0 + * + * @param string $plugin Relative plugin path from Plugin Directory. + */ +function uninstall_plugin($plugin) { + $file = plugin_basename($plugin); + + $uninstallable_plugins = (array) get_option('uninstall_plugins'); + if ( file_exists( WP_PLUGIN_DIR . '/' . dirname($file) . '/uninstall.php' ) ) { + if ( isset( $uninstallable_plugins[$file] ) ) { + unset($uninstallable_plugins[$file]); + update_option('uninstall_plugins', $uninstallable_plugins); + } + unset($uninstallable_plugins); + + define('WP_UNINSTALL_PLUGIN', $file); + include WP_PLUGIN_DIR . '/' . dirname($file) . '/uninstall.php'; + + return true; + } + + if ( isset( $uninstallable_plugins[$file] ) ) { + $callable = $uninstallable_plugins[$file]; + unset($uninstallable_plugins[$file]); + update_option('uninstall_plugins', $uninstallable_plugins); + unset($uninstallable_plugins); + + include WP_PLUGIN_DIR . '/' . $file; + + add_action( 'uninstall_' . $file, $callable ); + do_action( 'uninstall_' . $file ); + } +} + // // Menu // -function add_menu_page( $page_title, $menu_title, $access_level, $file, $function = '' ) { +function add_menu_page( $page_title, $menu_title, $access_level, $file, $function = '', $icon_url = '' ) { global $menu, $admin_page_hooks; $file = plugin_basename( $file ); - $menu[] = array ( $menu_title, $access_level, $file, $page_title ); + $admin_page_hooks[$file] = sanitize_title( $menu_title ); + + $hookname = get_plugin_page_hookname( $file, '' ); + if (!empty ( $function ) && !empty ( $hookname )) + add_action( $hookname, $function ); + + if ( empty($icon_url) ) + $icon_url = 'images/generic.png'; + + $menu[] = array ( $menu_title, $access_level, $file, $page_title, 'menu-top ' . $hookname, $hookname, $icon_url ); + + return $hookname; +} + +function add_object_page( $page_title, $menu_title, $access_level, $file, $function = '', $icon_url = '') { + global $menu, $admin_page_hooks, $_wp_last_object_menu; + + $file = plugin_basename( $file ); $admin_page_hooks[$file] = sanitize_title( $menu_title ); @@ -280,6 +570,34 @@ function add_menu_page( $page_title, $menu_title, $access_level, $file, $functio if (!empty ( $function ) && !empty ( $hookname )) add_action( $hookname, $function ); + if ( empty($icon_url) ) + $icon_url = 'images/generic.png'; + + $_wp_last_object_menu++; + + $menu[$_wp_last_object_menu] = array ( $menu_title, $access_level, $file, $page_title, 'menu-top ' . $hookname, $hookname, $icon_url ); + + return $hookname; +} + +function add_utility_page( $page_title, $menu_title, $access_level, $file, $function = '', $icon_url = '') { + global $menu, $admin_page_hooks, $_wp_last_utility_menu; + + $file = plugin_basename( $file ); + + $admin_page_hooks[$file] = sanitize_title( $menu_title ); + + $hookname = get_plugin_page_hookname( $file, '' ); + if (!empty ( $function ) && !empty ( $hookname )) + add_action( $hookname, $function ); + + if ( empty($icon_url) ) + $icon_url = 'images/generic.png'; + + $_wp_last_utility_menu++; + + $menu[$_wp_last_utility_menu] = array ( $menu_title, $access_level, $file, $page_title, 'menu-top ' . $hookname, $hookname, $icon_url ); + return $hookname; } @@ -320,8 +638,18 @@ function add_submenu_page( $parent, $page_title, $menu_title, $access_level, $fi return $hookname; } +/** + * Add sub menu page to the tools main menu. + * + * @param string $page_title + * @param unknown_type $menu_title + * @param unknown_type $access_level + * @param unknown_type $file + * @param unknown_type $function + * @return unknown + */ function add_management_page( $page_title, $menu_title, $access_level, $file, $function = '' ) { - return add_submenu_page( 'edit.php', $page_title, $menu_title, $access_level, $file, $function ); + return add_submenu_page( 'tools.php', $page_title, $menu_title, $access_level, $file, $function ); } function add_options_page( $page_title, $menu_title, $access_level, $file, $function = '' ) { @@ -340,11 +668,35 @@ function add_users_page( $page_title, $menu_title, $access_level, $file, $functi return add_submenu_page( $parent, $page_title, $menu_title, $access_level, $file, $function ); } +function add_dashboard_page( $page_title, $menu_title, $access_level, $file, $function = '' ) { + return add_submenu_page( 'index.php', $page_title, $menu_title, $access_level, $file, $function ); +} + +function add_posts_page( $page_title, $menu_title, $access_level, $file, $function = '' ) { + return add_submenu_page( 'edit.php', $page_title, $menu_title, $access_level, $file, $function ); +} + +function add_media_page( $page_title, $menu_title, $access_level, $file, $function = '' ) { + return add_submenu_page( 'upload.php', $page_title, $menu_title, $access_level, $file, $function ); +} + +function add_links_page( $page_title, $menu_title, $access_level, $file, $function = '' ) { + return add_submenu_page( 'link-manager.php', $page_title, $menu_title, $access_level, $file, $function ); +} + +function add_pages_page( $page_title, $menu_title, $access_level, $file, $function = '' ) { + return add_submenu_page( 'edit-pages.php', $page_title, $menu_title, $access_level, $file, $function ); +} + +function add_comments_page( $page_title, $menu_title, $access_level, $file, $function = '' ) { + return add_submenu_page( 'edit-comments.php', $page_title, $menu_title, $access_level, $file, $function ); +} + // // Pluggable Menu Support -- Private // -function get_admin_page_parent() { +function get_admin_page_parent( $parent = '' ) { global $parent_file; global $menu; global $submenu; @@ -354,12 +706,19 @@ function get_admin_page_parent() { global $_wp_menu_nopriv; global $_wp_submenu_nopriv; + if ( !empty ( $parent ) && 'admin.php' != $parent ) { + if ( isset( $_wp_real_parent_file[$parent] ) ) + $parent = $_wp_real_parent_file[$parent]; + return $parent; + } +/* if ( !empty ( $parent_file ) ) { if ( isset( $_wp_real_parent_file[$parent_file] ) ) $parent_file = $_wp_real_parent_file[$parent_file]; return $parent_file; } +*/ if ( $pagenow == 'admin.php' && isset( $plugin_page ) ) { foreach ( $menu as $parent_menu ) { @@ -400,7 +759,8 @@ function get_admin_page_parent() { } } - $parent_file = ''; + if ( empty($parent_file) ) + $parent_file = ''; return ''; } @@ -418,6 +778,7 @@ function get_admin_page_title() { $hook = get_plugin_page_hook( $plugin_page, $pagenow ); $parent = $parent1 = get_admin_page_parent(); + if ( empty ( $parent) ) { foreach ( $menu as $menu_array ) { if ( isset( $menu_array[3] ) ) { @@ -473,17 +834,17 @@ function get_plugin_page_hook( $plugin_page, $parent_page ) { function get_plugin_page_hookname( $plugin_page, $parent_page ) { global $admin_page_hooks; - $parent = get_admin_page_parent(); + $parent = get_admin_page_parent( $parent_page ); $page_type = 'admin'; - if ( empty ( $parent_page ) || 'admin.php' == $parent_page ) { - if ( isset( $admin_page_hooks[$plugin_page] )) + if ( empty ( $parent_page ) || 'admin.php' == $parent_page || isset( $admin_page_hooks[$plugin_page] ) ) { + if ( isset( $admin_page_hooks[$plugin_page] ) ) $page_type = 'toplevel'; else if ( isset( $admin_page_hooks[$parent] )) $page_type = $admin_page_hooks[$parent]; - } else if ( isset( $admin_page_hooks[$parent_page] ) ) { - $page_type = $admin_page_hooks[$parent_page]; + } else if ( isset( $admin_page_hooks[$parent] ) ) { + $page_type = $admin_page_hooks[$parent]; } $plugin_name = preg_replace( '!\.php!', '', $plugin_page ); @@ -501,7 +862,7 @@ function user_can_access_admin_page() { $parent = get_admin_page_parent(); - if ( isset( $_wp_submenu_nopriv[$parent][$pagenow] ) ) + if ( !isset( $plugin_page ) && isset( $_wp_submenu_nopriv[$parent][$pagenow] ) ) return false; if ( isset( $plugin_page ) && isset( $_wp_submenu_nopriv[$parent][$plugin_page] ) ) @@ -551,4 +912,154 @@ function user_can_access_admin_page() { return true; } +/* Whitelist functions */ + +/** + * Register a setting and its sanitization callback + * + * @since 2.7.0 + * + * @param string $option_group A settings group name. Can be anything. + * @param string $option_name The name of an option to sanitize and save. + * @param unknown_type $sanitize_callback A callback function that sanitizes the option's value. + * @return unknown + */ +function register_setting($option_group, $option_name, $sanitize_callback = '') { + return add_option_update_handler($option_group, $option_name, $sanitize_callback); +} + +/** + * Unregister a setting + * + * @since 2.7.0 + * + * @param unknown_type $option_group + * @param unknown_type $option_name + * @param unknown_type $sanitize_callback + * @return unknown + */ +function unregister_setting($option_group, $option_name, $sanitize_callback = '') { + return remove_option_update_handler($option_group, $option_name, $sanitize_callback); +} + +/** + * {@internal Missing Short Description}} + * + * @since unknown + * + * @param unknown_type $option_group + * @param unknown_type $option_name + * @param unknown_type $sanitize_callback + */ +function add_option_update_handler($option_group, $option_name, $sanitize_callback = '') { + global $new_whitelist_options; + $new_whitelist_options[ $option_group ][] = $option_name; + if ( $sanitize_callback != '' ) + add_filter( "sanitize_option_{$option_name}", $sanitize_callback ); +} + +/** + * {@internal Missing Short Description}} + * + * @since unknown + * + * @param unknown_type $option_group + * @param unknown_type $option_name + * @param unknown_type $sanitize_callback + */ +function remove_option_update_handler($option_group, $option_name, $sanitize_callback = '') { + global $new_whitelist_options; + $pos = array_search( $option_name, $new_whitelist_options ); + if ( $pos !== false ) + unset( $new_whitelist_options[ $option_group ][ $pos ] ); + if ( $sanitize_callback != '' ) + remove_filter( "sanitize_option_{$option_name}", $sanitize_callback ); +} + +/** + * {@internal Missing Short Description}} + * + * @since unknown + * + * @param unknown_type $options + * @return unknown + */ +function option_update_filter( $options ) { + global $new_whitelist_options; + + if ( is_array( $new_whitelist_options ) ) + $options = add_option_whitelist( $new_whitelist_options, $options ); + + return $options; +} +add_filter( 'whitelist_options', 'option_update_filter' ); + +/** + * {@internal Missing Short Description}} + * + * @since unknown + * + * @param unknown_type $new_options + * @param unknown_type $options + * @return unknown + */ +function add_option_whitelist( $new_options, $options = '' ) { + if( $options == '' ) { + global $whitelist_options; + } else { + $whitelist_options = $options; + } + foreach( $new_options as $page => $keys ) { + foreach( $keys as $key ) { + if ( !isset($whitelist_options[ $page ]) || !is_array($whitelist_options[ $page ]) ) { + $whitelist_options[ $page ] = array(); + $whitelist_options[ $page ][] = $key; + } else { + $pos = array_search( $key, $whitelist_options[ $page ] ); + if ( $pos === false ) + $whitelist_options[ $page ][] = $key; + } + } + } + return $whitelist_options; +} + +/** + * {@internal Missing Short Description}} + * + * @since unknown + * + * @param unknown_type $del_options + * @param unknown_type $options + * @return unknown + */ +function remove_option_whitelist( $del_options, $options = '' ) { + if( $options == '' ) { + global $whitelist_options; + } else { + $whitelist_options = $options; + } + foreach( $del_options as $page => $keys ) { + foreach( $keys as $key ) { + $pos = array_search( $key, $whitelist_options[ $page ] ); + if( $pos !== false ) + unset( $whitelist_options[ $page ][ $pos ] ); + } + } + return $whitelist_options; +} + +/** + * Output nonce, action, and option_page fields for a settings page. + * + * @since 2.7.0 + * + * @param string $option_group A settings group name. This should match the group name used in register_setting(). + */ +function settings_fields($option_group) { + echo ""; + echo ''; + wp_nonce_field("$option_group-options"); +} + ?>