Web.Admin/2014/wordpress/wp-includes/capabilities.php
<?php
/**
* WordPress Roles and Capabilities.
*
* @package WordPress
* @subpackage User
*/
/**
* WordPress User Roles.
*
* The role option is simple, the structure is organized by role name that store
* the name in value of the 'name' key. The capabilities are stored as an array
* in the value of the 'capability' key.
*
* <code>
* array (
* 'rolename' => array (
* 'name' => 'rolename',
* 'capabilities' => array()
* )
* )
* </code>
*
* @since 2.0.0
* @package WordPress
* @subpackage User
*/
class WP_Roles {
/**
* List of roles and capabilities.
*
* @since 2.0.0
* @access public
* @var array
*/
var $roles;
/**
* List of the role objects.
*
* @since 2.0.0
* @access public
* @var array
*/
var $role_objects = array();
/**
* List of role names.
*
* @since 2.0.0
* @access public
* @var array
*/
var $role_names = array();
/**
* Option name for storing role list.
*
* @since 2.0.0
* @access public
* @var string
*/
var $role_key;
/**
* Whether to use the database for retrieval and storage.
*
* @since 2.1.0
* @access public
* @var bool
*/
var $use_db = true;
/**
* PHP4 Constructor - Call {@link WP_Roles::_init()} method.
*
* @since 2.0.0
* @access public
*
* @return WP_Roles
*/
function WP_Roles() {
$this->_init();
}
/**
* Setup the object properties.
*
* The role key is set to the current prefix for the $wpdb object with
* 'user_roles' appended. If the $wp_user_roles global is set, then it will
* be used and the role option will not be updated or used.
*
* @since 2.1.0
* @access protected
* @uses $wpdb Used to get the database prefix.
* @global array $wp_user_roles Used to set the 'roles' property value.
*/
function _init () {
global $wpdb;
global $wp_user_roles;
$this->role_key = $wpdb->prefix . 'user_roles';
if ( ! empty( $wp_user_roles ) ) {
$this->roles = $wp_user_roles;
$this->use_db = false;
} else {
$this->roles = get_option( $this->role_key );
}
if ( empty( $this->roles ) )
return;
$this->role_objects = array();
$this->role_names = array();
foreach ( (array) $this->roles as $role => $data ) {
$this->role_objects[$role] = new WP_Role( $role, $this->roles[$role]['capabilities'] );
$this->role_names[$role] = $this->roles[$role]['name'];
}
}
/**
* Add role name with capabilities to list.
*
* Updates the list of roles, if the role doesn't already exist.
*
* The capabilities are defined in the following format `array( 'read' => true );`
* To explicitly deny a role a capability you set the value for that capability to false.
*
* @since 2.0.0
* @access public
*
* @param string $role Role name.
* @param string $display_name Role display name.
* @param array $capabilities List of role capabilities in the above format.
* @return null|WP_Role WP_Role object if role is added, null if already exists.
*/
function add_role( $role, $display_name, $capabilities = array() ) {
if ( isset( $this->roles[$role] ) )
return;
$this->roles[$role] = array(
'name' => $display_name,
'capabilities' => $capabilities
);
if ( $this->use_db )
update_option( $this->role_key, $this->roles );
$this->role_objects[$role] = new WP_Role( $role, $capabilities );
$this->role_names[$role] = $display_name;
return $this->role_objects[$role];
}
/**
* Remove role by name.
*
* @since 2.0.0
* @access public
*
* @param string $role Role name.
*/
function remove_role( $role ) {
if ( ! isset( $this->role_objects[$role] ) )
return;
unset( $this->role_objects[$role] );
unset( $this->role_names[$role] );
unset( $this->roles[$role] );
if ( $this->use_db )
update_option( $this->role_key, $this->roles );
}
/**
* Add capability to role.
*
* @since 2.0.0
* @access public
*
* @param string $role Role name.
* @param string $cap Capability name.
* @param bool $grant Optional, default is true. Whether role is capable of performing capability.
*/
function add_cap( $role, $cap, $grant = true ) {
$this->roles[$role]['capabilities'][$cap] = $grant;
if ( $this->use_db )
update_option( $this->role_key, $this->roles );
}
/**
* Remove capability from role.
*
* @since 2.0.0
* @access public
*
* @param string $role Role name.
* @param string $cap Capability name.
*/
function remove_cap( $role, $cap ) {
unset( $this->roles[$role]['capabilities'][$cap] );
if ( $this->use_db )
update_option( $this->role_key, $this->roles );
}
/**
* Retrieve role object by name.
*
* @since 2.0.0
* @access public
*
* @param string $role Role name.
* @return object|null Null, if role does not exist. WP_Role object, if found.
*/
function &get_role( $role ) {
if ( isset( $this->role_objects[$role] ) )
return $this->role_objects[$role];
else
return null;
}
/**
* Retrieve list of role names.
*
* @since 2.0.0
* @access public
*
* @return array List of role names.
*/
function get_names() {
return $this->role_names;
}
/**
* Whether role name is currently in the list of available roles.
*
* @since 2.0.0
* @access public
*
* @param string $role Role name to look up.
* @return bool
*/
function is_role( $role )
{
return isset( $this->role_names[$role] );
}
}
/**
* WordPress Role class.
*
* @since 2.0.0
* @package WordPress
* @subpackage User
*/
class WP_Role {
/**
* Role name.
*
* @since 2.0.0
* @access public
* @var string
*/
var $name;
/**
* List of capabilities the role contains.
*
* @since 2.0.0
* @access public
* @var array
*/
var $capabilities;
/**
* PHP4 Constructor - Setup object properties.
*
* The list of capabilities, must have the key as the name of the capability
* and the value a boolean of whether it is granted to the role or not.
*
* @since 2.0.0
* @access public
*
* @param string $role Role name.
* @param array $capabilities List of capabilities.
* @return WP_Role
*/
function WP_Role( $role, $capabilities ) {
$this->name = $role;
$this->capabilities = $capabilities;
}
/**
* Assign role a capability.
*
* @see WP_Roles::add_cap() Method uses implementation for role.
* @since 2.0.0
* @access public
*
* @param string $cap Capability name.
* @param bool $grant Whether role has capability privilege.
*/
function add_cap( $cap, $grant = true ) {
global $wp_roles;
if ( ! isset( $wp_roles ) )
$wp_roles = new WP_Roles();
$this->capabilities[$cap] = $grant;
$wp_roles->add_cap( $this->name, $cap, $grant );
}
/**
* Remove capability from role.
*
* This is a container for {@link WP_Roles::remove_cap()} to remove the
* capability from the role. That is to say, that {@link
* WP_Roles::remove_cap()} implements the functionality, but it also makes
* sense to use this class, because you don't need to enter the role name.
*
* @since 2.0.0
* @access public
*
* @param string $cap Capability name.
*/
function remove_cap( $cap ) {
global $wp_roles;
if ( ! isset( $wp_roles ) )
$wp_roles = new WP_Roles();
unset( $this->capabilities[$cap] );
$wp_roles->remove_cap( $this->name, $cap );
}
/**
* Whether role has capability.
*
* The capabilities is passed through the 'role_has_cap' filter. The first
* parameter for the hook is the list of capabilities the class has
* assigned. The second parameter is the capability name to look for. The
* third and final parameter for the hook is the role name.
*
* @since 2.0.0
* @access public
*
* @param string $cap Capability name.
* @return bool True, if user has capability. False, if doesn't have capability.
*/
function has_cap( $cap ) {
$capabilities = apply_filters( 'role_has_cap', $this->capabilities, $cap, $this->name );
if ( !empty( $capabilities[$cap] ) )
return $capabilities[$cap];
else
return false;
}
}
/**
* WordPress User class.
*
* @since 2.0.0
* @package WordPress
* @subpackage User
*/
class WP_User {
/**
* User data container.
*
* This will be set as properties of the object.
*
* @since 2.0.0
* @access private
* @var array
*/
var $data;
/**
* The user's ID.
*
* @since 2.1.0
* @access public
* @var int
*/
var $ID = 0;
/**
* The deprecated user's ID.
*
* @since 2.0.0
* @access public
* @deprecated Use WP_User::$ID
* @see WP_User::$ID
* @var int
*/
var $id = 0;
/**
* The individual capabilities the user has been given.
*
* @since 2.0.0
* @access public
* @var array
*/
var $caps = array();
/**
* User metadata option name.
*
* @since 2.0.0
* @access public
* @var string
*/
var $cap_key;
/**
* The roles the user is part of.
*
* @since 2.0.0
* @access public
* @var array
*/
var $roles = array();
/**
* All capabilities the user has, including individual and role based.
*
* @since 2.0.0
* @access public
* @var array
*/
var $allcaps = array();
/**
* First name of the user.
*
* Created to prevent notices.
*
* @since 2.7.0
* @access public
* @var string
*/
var $first_name = '';
/**
* Last name of the user.
*
* Created to prevent notices.
*
* @since 2.7.0
* @access public
* @var string
*/
var $last_name = '';
/**
* The filter context applied to user data fields.
*
* @since 2.9.0
* @access private
* @var string
*/
var $filter = null;
/**
* PHP4 Constructor - Sets up the object properties.
*
* Retrieves the userdata and then assigns all of the data keys to direct
* properties of the object. Calls {@link WP_User::_init_caps()} after
* setting up the object's user data properties.
*
* @since 2.0.0
* @access public
*
* @param int|string $id User's ID or username
* @param int $name Optional. User's username
* @return WP_User
*/
function WP_User( $id, $name = '' ) {
if ( empty( $id ) && empty( $name ) )
return;
if ( ! is_numeric( $id ) ) {
$name = $id;
$id = 0;
}
if ( ! empty( $id ) )
$this->data = get_userdata( $id );
else
$this->data = get_userdatabylogin( $name );
if ( empty( $this->data->ID ) )
return;
foreach ( get_object_vars( $this->data ) as $key => $value ) {
$this->{$key} = $value;
}
$this->id = $this->ID;
$this->_init_caps();
}
/**
* Setup capability object properties.
*
* Will set the value for the 'cap_key' property to current database table
* prefix, followed by 'capabilities'. Will then check to see if the
* property matching the 'cap_key' exists and is an array. If so, it will be
* used.
*
* @since 2.1.0
* @access protected
*/
function _init_caps() {
global $wpdb;
$this->cap_key = $wpdb->prefix . 'capabilities';
$this->caps = &$this->{$this->cap_key};
if ( ! is_array( $this->caps ) )
$this->caps = array();
$this->get_role_caps();
}
/**
* Retrieve all of the role capabilities and merge with individual capabilities.
*
* All of the capabilities of the roles the user belongs to are merged with
* the users individual roles. This also means that the user can be denied
* specific roles that their role might have, but the specific user isn't
* granted permission to.
*
* @since 2.0.0
* @uses $wp_roles
* @access public
*/
function get_role_caps() {
global $wp_roles;
if ( ! isset( $wp_roles ) )
$wp_roles = new WP_Roles();
//Filter out caps that are not role names and assign to $this->roles
if ( is_array( $this->caps ) )
$this->roles = array_filter( array_keys( $this->caps ), array( &$wp_roles, 'is_role' ) );
//Build $allcaps from role caps, overlay user's $caps
$this->allcaps = array();
foreach ( (array) $this->roles as $role ) {
$role =& $wp_roles->get_role( $role );
$this->allcaps = array_merge( (array) $this->allcaps, (array) $role->capabilities );
}
$this->allcaps = array_merge( (array) $this->allcaps, (array) $this->caps );
}
/**
* Add role to user.
*
* Updates the user's meta data option with capabilities and roles.
*
* @since 2.0.0
* @access public
*
* @param string $role Role name.
*/
function add_role( $role ) {
$this->caps[$role] = true;
update_usermeta( $this->ID, $this->cap_key, $this->caps );
$this->get_role_caps();
$this->update_user_level_from_caps();
}
/**
* Remove role from user.
*
* @since 2.0.0
* @access public
*
* @param string $role Role name.
*/
function remove_role( $role ) {
if ( empty( $this->roles[$role] ) || ( count( $this->roles ) <= 1 ) )
return;
unset( $this->caps[$role] );
update_usermeta( $this->ID, $this->cap_key, $this->caps );
$this->get_role_caps();
}
/**
* Set the role of the user.
*
* This will remove the previous roles of the user and assign the user the
* new one. You can set the role to an empty string and it will remove all
* of the roles from the user.
*
* @since 2.0.0
* @access public
*
* @param string $role Role name.
*/
function set_role( $role ) {
foreach ( (array) $this->roles as $oldrole )
unset( $this->caps[$oldrole] );
if ( !empty( $role ) ) {
$this->caps[$role] = true;
$this->roles = array( $role => true );
} else {
$this->roles = false;
}
update_usermeta( $this->ID, $this->cap_key, $this->caps );
$this->get_role_caps();
$this->update_user_level_from_caps();
do_action( 'set_user_role', $this->ID, $role );
}
/**
* Choose the maximum level the user has.
*
* Will compare the level from the $item parameter against the $max
* parameter. If the item is incorrect, then just the $max parameter value
* will be returned.
*
* Used to get the max level based on the capabilities the user has. This
* is also based on roles, so if the user is assigned the Administrator role
* then the capability 'level_10' will exist and the user will get that
* value.
*
* @since 2.0.0
* @access public
*
* @param int $max Max level of user.
* @param string $item Level capability name.
* @return int Max Level.
*/
function level_reduction( $max, $item ) {
if ( preg_match( '/^level_(10|[0-9])$/i', $item, $matches ) ) {
$level = intval( $matches[1] );
return max( $max, $level );
} else {
return $max;
}
}
/**
* Update the maximum user level for the user.
*
* Updates the 'user_level' user metadata (includes prefix that is the
* database table prefix) with the maximum user level. Gets the value from
* the all of the capabilities that the user has.
*
* @since 2.0.0
* @access public
*/
function update_user_level_from_caps() {
global $wpdb;
$this->user_level = array_reduce( array_keys( $this->allcaps ), array( &$this, 'level_reduction' ), 0 );
update_usermeta( $this->ID, $wpdb->prefix.'user_level', $this->user_level );
}
/**
* Add capability and grant or deny access to capability.
*
* @since 2.0.0
* @access public
*
* @param string $cap Capability name.
* @param bool $grant Whether to grant capability to user.
*/
function add_cap( $cap, $grant = true ) {
$this->caps[$cap] = $grant;
update_usermeta( $this->ID, $this->cap_key, $this->caps );
}
/**
* Remove capability from user.
*
* @since 2.0.0
* @access public
*
* @param string $cap Capability name.
*/
function remove_cap( $cap ) {
if ( empty( $this->caps[$cap] ) ) return;
unset( $this->caps[$cap] );
update_usermeta( $this->ID, $this->cap_key, $this->caps );
}
/**
* Remove all of the capabilities of the user.
*
* @since 2.1.0
* @access public
*/
function remove_all_caps() {
global $wpdb;
$this->caps = array();
update_usermeta( $this->ID, $this->cap_key, '' );
update_usermeta( $this->ID, $wpdb->prefix.'user_level', '' );
$this->get_role_caps();
}
/**
* Whether user has capability or role name.
*
* This is useful for looking up whether the user has a specific role
* assigned to the user. The second optional parameter can also be used to
* check for capabilities against a specfic post.
*
* @since 2.0.0
* @access public
*
* @param string|int $cap Capability or role name to search.
* @param int $post_id Optional. Post ID to check capability against specific post.
* @return bool True, if user has capability; false, if user does not have capability.
*/
function has_cap( $cap ) {
if ( is_numeric( $cap ) )
$cap = $this->translate_level_to_cap( $cap );
$args = array_slice( func_get_args(), 1 );
$args = array_merge( array( $cap, $this->ID ), $args );
$caps = call_user_func_array( 'map_meta_cap', $args );
// Must have ALL requested caps
$capabilities = apply_filters( 'user_has_cap', $this->allcaps, $caps, $args );
foreach ( (array) $caps as $cap ) {
//echo "Checking cap $cap<br />";
if ( empty( $capabilities[$cap] ) || !$capabilities[$cap] )
return false;
}
return true;
}
/**
* Convert numeric level to level capability name.
*
* Prepends 'level_' to level number.
*
* @since 2.0.0
* @access public
*
* @param int $level Level number, 1 to 10.
* @return string
*/
function translate_level_to_cap( $level ) {
return 'level_' . $level;
}
}
/**
* Map meta capabilities to primitive capabilities.
*
* This does not actually compare whether the user ID has the actual capability,
* just what the capability or capabilities are. Meta capability list value can
* be 'delete_user', 'edit_user', 'delete_post', 'delete_page', 'edit_post',
* 'edit_page', 'read_post', or 'read_page'.
*
* @since 2.0.0
*
* @param string $cap Capability name.
* @param int $user_id User ID.
* @return array Actual capabilities for meta capability.
*/
function map_meta_cap( $cap, $user_id ) {
$args = array_slice( func_get_args(), 2 );
$caps = array();
switch ( $cap ) {
case 'delete_user':
$caps[] = 'delete_users';
break;
case 'edit_user':
if ( !isset( $args[0] ) || $user_id != $args[0] ) {
$caps[] = 'edit_users';
}
break;
case 'delete_post':
$author_data = get_userdata( $user_id );
//echo "post ID: {$args[0]}<br />";
$post = get_post( $args[0] );
if ( 'page' == $post->post_type ) {
$args = array_merge( array( 'delete_page', $user_id ), $args );
return call_user_func_array( 'map_meta_cap', $args );
}
if ('' != $post->post_author) {
$post_author_data = get_userdata( $post->post_author );
} else {
//No author set yet so default to current user for cap checks
$post_author_data = $author_data;
}
// If the user is the author...
if ( $user_id == $post_author_data->ID ) {
// If the post is published...
if ( 'publish' == $post->post_status ) {
$caps[] = 'delete_published_posts';
} elseif ( 'trash' == $post->post_status ) {
if ('publish' == get_post_meta($post->ID, '_wp_trash_meta_status', true) )
$caps[] = 'delete_published_posts';
} else {
// If the post is draft...
$caps[] = 'delete_posts';
}
} else {
// The user is trying to edit someone else's post.
$caps[] = 'delete_others_posts';
// The post is published, extra cap required.
if ( 'publish' == $post->post_status )
$caps[] = 'delete_published_posts';
elseif ( 'private' == $post->post_status )
$caps[] = 'delete_private_posts';
}
break;
case 'delete_page':
$author_data = get_userdata( $user_id );
//echo "post ID: {$args[0]}<br />";
$page = get_page( $args[0] );
$page_author_data = get_userdata( $page->post_author );
//echo "current user id : $user_id, page author id: " . $page_author_data->ID . "<br />";
// If the user is the author...
if ('' != $page->post_author) {
$page_author_data = get_userdata( $page->post_author );
} else {
//No author set yet so default to current user for cap checks
$page_author_data = $author_data;
}
if ( $user_id == $page_author_data->ID ) {
// If the page is published...
if ( $page->post_status == 'publish' ) {
$caps[] = 'delete_published_pages';
} elseif ( 'trash' == $page->post_status ) {
if ('publish' == get_post_meta($page->ID, '_wp_trash_meta_status', true) )
$caps[] = 'delete_published_pages';
} else {
// If the page is draft...
$caps[] = 'delete_pages';
}
} else {
// The user is trying to edit someone else's page.
$caps[] = 'delete_others_pages';
// The page is published, extra cap required.
if ( $page->post_status == 'publish' )
$caps[] = 'delete_published_pages';
elseif ( $page->post_status == 'private' )
$caps[] = 'delete_private_pages';
}
break;
// edit_post breaks down to edit_posts, edit_published_posts, or
// edit_others_posts
case 'edit_post':
$author_data = get_userdata( $user_id );
//echo "post ID: {$args[0]}<br />";
$post = get_post( $args[0] );
if ( 'page' == $post->post_type ) {
$args = array_merge( array( 'edit_page', $user_id ), $args );
return call_user_func_array( 'map_meta_cap', $args );
}
$post_author_data = get_userdata( $post->post_author );
//echo "current user id : $user_id, post author id: " . $post_author_data->ID . "<br />";
// If the user is the author...
if ( $user_id == $post_author_data->ID ) {
// If the post is published...
if ( 'publish' == $post->post_status ) {
$caps[] = 'edit_published_posts';
} elseif ( 'trash' == $post->post_status ) {
if ('publish' == get_post_meta($post->ID, '_wp_trash_meta_status', true) )
$caps[] = 'edit_published_posts';
} else {
// If the post is draft...
$caps[] = 'edit_posts';
}
} else {
// The user is trying to edit someone else's post.
$caps[] = 'edit_others_posts';
// The post is published, extra cap required.
if ( 'publish' == $post->post_status )
$caps[] = 'edit_published_posts';
elseif ( 'private' == $post->post_status )
$caps[] = 'edit_private_posts';
}
break;
case 'edit_page':
$author_data = get_userdata( $user_id );
//echo "post ID: {$args[0]}<br />";
$page = get_page( $args[0] );
$page_author_data = get_userdata( $page->post_author );
//echo "current user id : $user_id, page author id: " . $page_author_data->ID . "<br />";
// If the user is the author...
if ( $user_id == $page_author_data->ID ) {
// If the page is published...
if ( 'publish' == $page->post_status ) {
$caps[] = 'edit_published_pages';
} elseif ( 'trash' == $page->post_status ) {
if ('publish' == get_post_meta($page->ID, '_wp_trash_meta_status', true) )
$caps[] = 'edit_published_pages';
} else {
// If the page is draft...
$caps[] = 'edit_pages';
}
} else {
// The user is trying to edit someone else's page.
$caps[] = 'edit_others_pages';
// The page is published, extra cap required.
if ( 'publish' == $page->post_status )
$caps[] = 'edit_published_pages';
elseif ( 'private' == $page->post_status )
$caps[] = 'edit_private_pages';
}
break;
case 'read_post':
$post = get_post( $args[0] );
if ( 'page' == $post->post_type ) {
$args = array_merge( array( 'read_page', $user_id ), $args );
return call_user_func_array( 'map_meta_cap', $args );
}
if ( 'private' != $post->post_status ) {
$caps[] = 'read';
break;
}
$author_data = get_userdata( $user_id );
$post_author_data = get_userdata( $post->post_author );
if ( $user_id == $post_author_data->ID )
$caps[] = 'read';
else
$caps[] = 'read_private_posts';
break;
case 'read_page':
$page = get_page( $args[0] );
if ( 'private' != $page->post_status ) {
$caps[] = 'read';
break;
}
$author_data = get_userdata( $user_id );
$page_author_data = get_userdata( $page->post_author );
if ( $user_id == $page_author_data->ID )
$caps[] = 'read';
else
$caps[] = 'read_private_pages';
break;
case 'unfiltered_upload':
if ( defined('ALLOW_UNFILTERED_UPLOADS') && ALLOW_UNFILTERED_UPLOADS == true )
$caps[] = $cap;
else
$caps[] = 'do_not_allow';
break;
default:
// If no meta caps match, return the original cap.
$caps[] = $cap;
}
return apply_filters('map_meta_cap', $caps, $cap, $user_id, $args);
}
/**
* Whether current user has capability or role.
*
* @since 2.0.0
*
* @param string $capability Capability or role name.
* @return bool
*/
function current_user_can( $capability ) {
$current_user = wp_get_current_user();
if ( empty( $current_user ) )
return false;
$args = array_slice( func_get_args(), 1 );
$args = array_merge( array( $capability ), $args );
return call_user_func_array( array( &$current_user, 'has_cap' ), $args );
}
/**
* Whether author of supplied post has capability or role.
*
* @since 2.9.0
*
* @param int|object $post Post ID or post object.
* @param string $capability Capability or role name.
* @return bool
*/
function author_can( $post, $capability ) {
if ( !$post = get_post($post) )
return false;
$author = new WP_User( $post->post_author );
if ( empty( $author ) )
return false;
$args = array_slice( func_get_args(), 2 );
$args = array_merge( array( $capability ), $args );
return call_user_func_array( array( &$author, 'has_cap' ), $args );
}
/**
* Retrieve role object.
*
* @see WP_Roles::get_role() Uses method to retrieve role object.
* @since 2.0.0
*
* @param string $role Role name.
* @return object
*/
function get_role( $role ) {
global $wp_roles;
if ( ! isset( $wp_roles ) )
$wp_roles = new WP_Roles();
return $wp_roles->get_role( $role );
}
/**
* Add role, if it does not exist.
*
* @see WP_Roles::add_role() Uses method to add role.
* @since 2.0.0
*
* @param string $role Role name.
* @param string $display_name Display name for role.
* @param array $capabilities List of capabilities.
* @return null|WP_Role WP_Role object if role is added, null if already exists.
*/
function add_role( $role, $display_name, $capabilities = array() ) {
global $wp_roles;
if ( ! isset( $wp_roles ) )
$wp_roles = new WP_Roles();
return $wp_roles->add_role( $role, $display_name, $capabilities );
}
/**
* Remove role, if it exists.
*
* @see WP_Roles::remove_role() Uses method to remove role.
* @since 2.0.0
*
* @param string $role Role name.
* @return null
*/
function remove_role( $role ) {
global $wp_roles;
if ( ! isset( $wp_roles ) )
$wp_roles = new WP_Roles();
return $wp_roles->remove_role( $role );
}
?>