WordPress/wp-includes/capabilities.php

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<?php
/**
* Core User Role & Capabilities API
*
* @package WordPress
* @subpackage Users
*/
/**
* Maps a capability to the primitive capabilities required of the given user to
* satisfy the capability being checked.
*
* This function also accepts an ID of an object to map against if the capability is a meta capability. Meta
* capabilities such as `edit_post` and `edit_user` are capabilities used by this function to map to primitive
* capabilities that a user or role requires, such as `edit_posts` and `edit_others_posts`.
*
* Example usage:
*
* map_meta_cap( 'edit_posts', $user->ID );
* map_meta_cap( 'edit_post', $user->ID, $post->ID );
* map_meta_cap( 'edit_post_meta', $user->ID, $post->ID, $meta_key );
*
* This function does not check whether the user has the required capabilities,
* it just returns what the required capabilities are.
*
* @since 2.0.0
* @since 4.9.6 Added the `export_others_personal_data`, `erase_others_personal_data`,
* and `manage_privacy_options` capabilities.
* @since 5.1.0 Added the `update_php` capability.
* @since 5.2.0 Added the `resume_plugin` and `resume_theme` capabilities.
* @since 5.3.0 Formalized the existing and already documented `...$args` parameter
* by adding it to the function signature.
* @since 5.7.0 Added the `create_app_password`, `list_app_passwords`, `read_app_password`,
* `edit_app_password`, `delete_app_passwords`, `delete_app_password`,
* and `update_https` capabilities.
*
* @global array $post_type_meta_caps Used to get post type meta capabilities.
*
* @param string $cap Capability being checked.
* @param int $user_id User ID.
* @param mixed ...$args Optional further parameters, typically starting with an object ID.
* @return string[] Primitive capabilities required of the user.
*/
function map_meta_cap( $cap, $user_id, ...$args ) {
$caps = array();
switch ( $cap ) {
case 'remove_user':
// In multisite the user must be a super admin to remove themselves.
if ( isset( $args[0] ) && $user_id == $args[0] && ! is_super_admin( $user_id ) ) {
$caps[] = 'do_not_allow';
} else {
$caps[] = 'remove_users';
}
break;
case 'promote_user':
case 'add_users':
$caps[] = 'promote_users';
break;
case 'edit_user':
case 'edit_users':
// Allow user to edit themselves.
if ( 'edit_user' === $cap && isset( $args[0] ) && $user_id == $args[0] ) {
break;
}
// In multisite the user must have manage_network_users caps. If editing a super admin, the user must be a super admin.
if ( is_multisite() && ( ( ! is_super_admin( $user_id ) && 'edit_user' === $cap && is_super_admin( $args[0] ) ) || ! user_can( $user_id, 'manage_network_users' ) ) ) {
$caps[] = 'do_not_allow';
} else {
$caps[] = 'edit_users'; // edit_user maps to edit_users.
}
break;
case 'delete_post':
case 'delete_page':
$post = get_post( $args[0] );
if ( ! $post ) {
$caps[] = 'do_not_allow';
break;
}
if ( 'revision' === $post->post_type ) {
$caps[] = 'do_not_allow';
break;
}
if ( ( get_option( 'page_for_posts' ) == $post->ID ) || ( get_option( 'page_on_front' ) == $post->ID ) ) {
$caps[] = 'manage_options';
break;
}
$post_type = get_post_type_object( $post->post_type );
if ( ! $post_type ) {
/* translators: 1: Post type, 2: Capability name. */
_doing_it_wrong( __FUNCTION__, sprintf( __( 'The post type %1$s is not registered, so it may not be reliable to check the capability "%2$s" against a post of that type.' ), $post->post_type, $cap ), '4.4.0' );
$caps[] = 'edit_others_posts';
break;
}
if ( ! $post_type->map_meta_cap ) {
$caps[] = $post_type->cap->$cap;
// Prior to 3.1 we would re-call map_meta_cap here.
if ( 'delete_post' === $cap ) {
$cap = $post_type->cap->$cap;
}
break;
}
// If the post author is set and the user is the author...
if ( $post->post_author && $user_id == $post->post_author ) {
// If the post is published or scheduled...
if ( in_array( $post->post_status, array( 'publish', 'future' ), true ) ) {
$caps[] = $post_type->cap->delete_published_posts;
} elseif ( 'trash' === $post->post_status ) {
$status = get_post_meta( $post->ID, '_wp_trash_meta_status', true );
if ( in_array( $status, array( 'publish', 'future' ), true ) ) {
$caps[] = $post_type->cap->delete_published_posts;
} else {
$caps[] = $post_type->cap->delete_posts;
}
} else {
// If the post is draft...
$caps[] = $post_type->cap->delete_posts;
}
} else {
// The user is trying to edit someone else's post.
$caps[] = $post_type->cap->delete_others_posts;
// The post is published or scheduled, extra cap required.
if ( in_array( $post->post_status, array( 'publish', 'future' ), true ) ) {
$caps[] = $post_type->cap->delete_published_posts;
} elseif ( 'private' === $post->post_status ) {
$caps[] = $post_type->cap->delete_private_posts;
}
}
/*
* Setting the privacy policy page requires `manage_privacy_options`,
* so deleting it should require that too.
*/
if ( (int) get_option( 'wp_page_for_privacy_policy' ) === $post->ID ) {
$caps = array_merge( $caps, map_meta_cap( 'manage_privacy_options', $user_id ) );
}
break;
// edit_post breaks down to edit_posts, edit_published_posts, or
// edit_others_posts.
case 'edit_post':
case 'edit_page':
$post = get_post( $args[0] );
if ( ! $post ) {
$caps[] = 'do_not_allow';
break;
}
if ( 'revision' === $post->post_type ) {
$post = get_post( $post->post_parent );
if ( ! $post ) {
$caps[] = 'do_not_allow';
break;
}
}
$post_type = get_post_type_object( $post->post_type );
if ( ! $post_type ) {
/* translators: 1: Post type, 2: Capability name. */
_doing_it_wrong( __FUNCTION__, sprintf( __( 'The post type %1$s is not registered, so it may not be reliable to check the capability "%2$s" against a post of that type.' ), $post->post_type, $cap ), '4.4.0' );
$caps[] = 'edit_others_posts';
break;
}
if ( ! $post_type->map_meta_cap ) {
$caps[] = $post_type->cap->$cap;
// Prior to 3.1 we would re-call map_meta_cap here.
if ( 'edit_post' === $cap ) {
$cap = $post_type->cap->$cap;
}
break;
}
// If the post author is set and the user is the author...
if ( $post->post_author && $user_id == $post->post_author ) {
// If the post is published or scheduled...
if ( in_array( $post->post_status, array( 'publish', 'future' ), true ) ) {
$caps[] = $post_type->cap->edit_published_posts;
} elseif ( 'trash' === $post->post_status ) {
$status = get_post_meta( $post->ID, '_wp_trash_meta_status', true );
if ( in_array( $status, array( 'publish', 'future' ), true ) ) {
$caps[] = $post_type->cap->edit_published_posts;
} else {
$caps[] = $post_type->cap->edit_posts;
}
} else {
// If the post is draft...
$caps[] = $post_type->cap->edit_posts;
}
} else {
// The user is trying to edit someone else's post.
$caps[] = $post_type->cap->edit_others_posts;
// The post is published or scheduled, extra cap required.
if ( in_array( $post->post_status, array( 'publish', 'future' ), true ) ) {
$caps[] = $post_type->cap->edit_published_posts;
} elseif ( 'private' === $post->post_status ) {
$caps[] = $post_type->cap->edit_private_posts;
}
}
/*
* Setting the privacy policy page requires `manage_privacy_options`,
* so editing it should require that too.
*/
if ( (int) get_option( 'wp_page_for_privacy_policy' ) === $post->ID ) {
$caps = array_merge( $caps, map_meta_cap( 'manage_privacy_options', $user_id ) );
}
break;
case 'read_post':
case 'read_page':
$post = get_post( $args[0] );
if ( ! $post ) {
$caps[] = 'do_not_allow';
break;
}
if ( 'revision' === $post->post_type ) {
$post = get_post( $post->post_parent );
if ( ! $post ) {
$caps[] = 'do_not_allow';
break;
}
}
$post_type = get_post_type_object( $post->post_type );
if ( ! $post_type ) {
/* translators: 1: Post type, 2: Capability name. */
_doing_it_wrong( __FUNCTION__, sprintf( __( 'The post type %1$s is not registered, so it may not be reliable to check the capability "%2$s" against a post of that type.' ), $post->post_type, $cap ), '4.4.0' );
$caps[] = 'edit_others_posts';
break;
}
if ( ! $post_type->map_meta_cap ) {
$caps[] = $post_type->cap->$cap;
// Prior to 3.1 we would re-call map_meta_cap here.
if ( 'read_post' === $cap ) {
$cap = $post_type->cap->$cap;
}
break;
}
$status_obj = get_post_status_object( get_post_status( $post ) );
if ( ! $status_obj ) {
/* translators: 1: Post status, 2: Capability name. */
_doing_it_wrong( __FUNCTION__, sprintf( __( 'The post status %1$s is not registered, so it may not be reliable to check the capability "%2$s" against a post with that status.' ), get_post_status( $post ), $cap ), '5.4.0' );
$caps[] = 'edit_others_posts';
break;
}
if ( $status_obj->public ) {
$caps[] = $post_type->cap->read;
break;
}
if ( $post->post_author && $user_id == $post->post_author ) {
$caps[] = $post_type->cap->read;
} elseif ( $status_obj->private ) {
$caps[] = $post_type->cap->read_private_posts;
} else {
$caps = map_meta_cap( 'edit_post', $user_id, $post->ID );
}
break;
case 'publish_post':
$post = get_post( $args[0] );
if ( ! $post ) {
$caps[] = 'do_not_allow';
break;
}
$post_type = get_post_type_object( $post->post_type );
if ( ! $post_type ) {
/* translators: 1: Post type, 2: Capability name. */
_doing_it_wrong( __FUNCTION__, sprintf( __( 'The post type %1$s is not registered, so it may not be reliable to check the capability "%2$s" against a post of that type.' ), $post->post_type, $cap ), '4.4.0' );
$caps[] = 'edit_others_posts';
break;
}
$caps[] = $post_type->cap->publish_posts;
break;
case 'edit_post_meta':
case 'delete_post_meta':
case 'add_post_meta':
case 'edit_comment_meta':
case 'delete_comment_meta':
case 'add_comment_meta':
case 'edit_term_meta':
case 'delete_term_meta':
case 'add_term_meta':
case 'edit_user_meta':
case 'delete_user_meta':
case 'add_user_meta':
$object_type = explode( '_', $cap )[1];
$object_id = (int) $args[0];
$object_subtype = get_object_subtype( $object_type, $object_id );
if ( empty( $object_subtype ) ) {
$caps[] = 'do_not_allow';
break;
}
$caps = map_meta_cap( "edit_{$object_type}", $user_id, $object_id );
$meta_key = isset( $args[1] ) ? $args[1] : false;
if ( $meta_key ) {
$allowed = ! is_protected_meta( $meta_key, $object_type );
if ( ! empty( $object_subtype ) && has_filter( "auth_{$object_type}_meta_{$meta_key}_for_{$object_subtype}" ) ) {
/**
* Filters whether the user is allowed to edit a specific meta key of a specific object type and subtype.
*
* The dynamic portions of the hook name, `$object_type`, `$meta_key`,
* and `$object_subtype`, refer to the metadata object type (comment, post, term or user),
* the meta key value, and the object subtype respectively.
*
* @since 4.9.8
*
* @param bool $allowed Whether the user can add the object meta. Default false.
* @param string $meta_key The meta key.
* @param int $object_id Object ID.
* @param int $user_id User ID.
* @param string $cap Capability name.
* @param string[] $caps Array of the user's capabilities.
*/
$allowed = apply_filters( "auth_{$object_type}_meta_{$meta_key}_for_{$object_subtype}", $allowed, $meta_key, $object_id, $user_id, $cap, $caps );
} else {
/**
* Filters whether the user is allowed to edit a specific meta key of a specific object type.
*
* Return true to have the mapped meta caps from `edit_{$object_type}` apply.
*
* The dynamic portion of the hook name, `$object_type` refers to the object type being filtered.
* The dynamic portion of the hook name, `$meta_key`, refers to the meta key passed to map_meta_cap().
*
* @since 3.3.0 As `auth_post_meta_{$meta_key}`.
* @since 4.6.0
*
* @param bool $allowed Whether the user can add the object meta. Default false.
* @param string $meta_key The meta key.
* @param int $object_id Object ID.
* @param int $user_id User ID.
* @param string $cap Capability name.
* @param string[] $caps Array of the user's capabilities.
*/
$allowed = apply_filters( "auth_{$object_type}_meta_{$meta_key}", $allowed, $meta_key, $object_id, $user_id, $cap, $caps );
}
if ( ! empty( $object_subtype ) ) {
/**
* Filters whether the user is allowed to edit meta for specific object types/subtypes.
*
* Return true to have the mapped meta caps from `edit_{$object_type}` apply.
*
* The dynamic portion of the hook name, `$object_type` refers to the object type being filtered.
* The dynamic portion of the hook name, `$object_subtype` refers to the object subtype being filtered.
* The dynamic portion of the hook name, `$meta_key`, refers to the meta key passed to map_meta_cap().
*
* @since 4.6.0 As `auth_post_{$post_type}_meta_{$meta_key}`.
* @since 4.7.0 Renamed from `auth_post_{$post_type}_meta_{$meta_key}` to
* `auth_{$object_type}_{$object_subtype}_meta_{$meta_key}`.
* @deprecated 4.9.8 Use {@see 'auth_{$object_type}_meta_{$meta_key}_for_{$object_subtype}'} instead.
*
* @param bool $allowed Whether the user can add the object meta. Default false.
* @param string $meta_key The meta key.
* @param int $object_id Object ID.
* @param int $user_id User ID.
* @param string $cap Capability name.
* @param string[] $caps Array of the user's capabilities.
*/
$allowed = apply_filters_deprecated(
"auth_{$object_type}_{$object_subtype}_meta_{$meta_key}",
array( $allowed, $meta_key, $object_id, $user_id, $cap, $caps ),
'4.9.8',
"auth_{$object_type}_meta_{$meta_key}_for_{$object_subtype}"
);
}
if ( ! $allowed ) {
$caps[] = $cap;
}
}
break;
case 'edit_comment':
$comment = get_comment( $args[0] );
if ( ! $comment ) {
$caps[] = 'do_not_allow';
break;
}
$post = get_post( $comment->comment_post_ID );
/*
* If the post doesn't exist, we have an orphaned comment.
* Fall back to the edit_posts capability, instead.
*/
if ( $post ) {
$caps = map_meta_cap( 'edit_post', $user_id, $post->ID );
} else {
$caps = map_meta_cap( 'edit_posts', $user_id );
}
break;
case 'unfiltered_upload':
if ( defined( 'ALLOW_UNFILTERED_UPLOADS' ) && ALLOW_UNFILTERED_UPLOADS && ( ! is_multisite() || is_super_admin( $user_id ) ) ) {
$caps[] = $cap;
} else {
$caps[] = 'do_not_allow';
}
break;
case 'edit_css':
case 'unfiltered_html':
// Disallow unfiltered_html for all users, even admins and super admins.
if ( defined( 'DISALLOW_UNFILTERED_HTML' ) && DISALLOW_UNFILTERED_HTML ) {
$caps[] = 'do_not_allow';
} elseif ( is_multisite() && ! is_super_admin( $user_id ) ) {
$caps[] = 'do_not_allow';
} else {
$caps[] = 'unfiltered_html';
}
break;
case 'edit_files':
case 'edit_plugins':
case 'edit_themes':
// Disallow the file editors.
if ( defined( 'DISALLOW_FILE_EDIT' ) && DISALLOW_FILE_EDIT ) {
$caps[] = 'do_not_allow';
} elseif ( ! wp_is_file_mod_allowed( 'capability_edit_themes' ) ) {
$caps[] = 'do_not_allow';
} elseif ( is_multisite() && ! is_super_admin( $user_id ) ) {
$caps[] = 'do_not_allow';
} else {
$caps[] = $cap;
}
break;
case 'update_plugins':
case 'delete_plugins':
case 'install_plugins':
case 'upload_plugins':
case 'update_themes':
case 'delete_themes':
case 'install_themes':
case 'upload_themes':
case 'update_core':
// Disallow anything that creates, deletes, or updates core, plugin, or theme files.
// Files in uploads are excepted.
if ( ! wp_is_file_mod_allowed( 'capability_update_core' ) ) {
$caps[] = 'do_not_allow';
} elseif ( is_multisite() && ! is_super_admin( $user_id ) ) {
$caps[] = 'do_not_allow';
} elseif ( 'upload_themes' === $cap ) {
$caps[] = 'install_themes';
} elseif ( 'upload_plugins' === $cap ) {
$caps[] = 'install_plugins';
} else {
$caps[] = $cap;
}
break;
case 'install_languages':
case 'update_languages':
if ( ! wp_is_file_mod_allowed( 'can_install_language_pack' ) ) {
$caps[] = 'do_not_allow';
} elseif ( is_multisite() && ! is_super_admin( $user_id ) ) {
$caps[] = 'do_not_allow';
} else {
$caps[] = 'install_languages';
}
break;
case 'activate_plugins':
case 'deactivate_plugins':
case 'activate_plugin':
case 'deactivate_plugin':
$caps[] = 'activate_plugins';
if ( is_multisite() ) {
// update_, install_, and delete_ are handled above with is_super_admin().
$menu_perms = get_site_option( 'menu_items', array() );
if ( empty( $menu_perms['plugins'] ) ) {
$caps[] = 'manage_network_plugins';
}
}
break;
case 'resume_plugin':
$caps[] = 'resume_plugins';
break;
case 'resume_theme':
$caps[] = 'resume_themes';
break;
case 'delete_user':
case 'delete_users':
// If multisite only super admins can delete users.
if ( is_multisite() && ! is_super_admin( $user_id ) ) {
$caps[] = 'do_not_allow';
} else {
$caps[] = 'delete_users'; // delete_user maps to delete_users.
}
break;
case 'create_users':
if ( ! is_multisite() ) {
$caps[] = $cap;
} elseif ( is_super_admin( $user_id ) || get_site_option( 'add_new_users' ) ) {
$caps[] = $cap;
} else {
$caps[] = 'do_not_allow';
}
break;
case 'manage_links':
if ( get_option( 'link_manager_enabled' ) ) {
$caps[] = $cap;
} else {
$caps[] = 'do_not_allow';
}
break;
case 'customize':
$caps[] = 'edit_theme_options';
break;
case 'delete_site':
if ( is_multisite() ) {
$caps[] = 'manage_options';
} else {
$caps[] = 'do_not_allow';
}
break;
case 'edit_term':
case 'delete_term':
case 'assign_term':
$term_id = (int) $args[0];
$term = get_term( $term_id );
if ( ! $term || is_wp_error( $term ) ) {
$caps[] = 'do_not_allow';
break;
}
$tax = get_taxonomy( $term->taxonomy );
if ( ! $tax ) {
$caps[] = 'do_not_allow';
break;
}
if ( 'delete_term' === $cap
&& ( get_option( 'default_' . $term->taxonomy ) == $term->term_id
|| get_option( 'default_term_' . $term->taxonomy ) == $term->term_id )
) {
$caps[] = 'do_not_allow';
break;
}
$taxo_cap = $cap . 's';
$caps = map_meta_cap( $tax->cap->$taxo_cap, $user_id, $term_id );
break;
case 'manage_post_tags':
case 'edit_categories':
case 'edit_post_tags':
case 'delete_categories':
case 'delete_post_tags':
$caps[] = 'manage_categories';
break;
case 'assign_categories':
case 'assign_post_tags':
$caps[] = 'edit_posts';
break;
case 'create_sites':
case 'delete_sites':
case 'manage_network':
case 'manage_sites':
case 'manage_network_users':
case 'manage_network_plugins':
case 'manage_network_themes':
case 'manage_network_options':
case 'upgrade_network':
$caps[] = $cap;
break;
case 'setup_network':
if ( is_multisite() ) {
$caps[] = 'manage_network_options';
} else {
$caps[] = 'manage_options';
}
break;
case 'update_php':
if ( is_multisite() && ! is_super_admin( $user_id ) ) {
$caps[] = 'do_not_allow';
} else {
$caps[] = 'update_core';
}
break;
Security, Site Health: Make migrating a site to HTTPS a one-click interaction. Switching a WordPress site from HTTP to HTTPS has historically been a tedious task. While on the surface the Site Address and WordPress Address have to be updated, existing content still remains using HTTP URLs where hard-coded in the database. Furthermore, updating _two_ URLs to migrate to HTTPS is still a fairly unintuitive step which is not clearly explained. This changeset simplifies migration from HTTP to HTTPS and, where possible, makes it a one-click interaction. * Automatically replace insecure versions of the Site Address (`home_url()`) with its HTTPS counterpart on the fly if the site has been migrated from HTTP to HTTPS. This is accomplished by introducing a `https_migration_required` option and enabling it when the `home_url()` is accordingly changed. * A new `wp_replace_insecure_home_url()` function is hooked into various pieces of content to replace URLs accordingly. * The migration only kicks in when the Site Address (`home_url()`) and WordPress Address (`site_url()`) match, which is the widely common case. Configurations where these differ are often maintained by more advanced users, where this migration routine would be less essential - something to potentially iterate on in the future though. * The migration does not actually update content in the database. More savvy users that prefer to do that can prevent the migration logic from running by either deleting the `https_migration_required` option or using the new `wp_should_replace_insecure_home_url` filter. * For fresh sites that do not have any content yet at the point of changing the URLs to HTTPS, the migration will also be skipped since it would not be relevant. * Expose a primary action in the Site Health recommendation, if HTTPS is already supported by the environment, built on top of the HTTPS detection mechanism from [49904]. When clicked, the default behavior is to update `home_url()` and `site_url()` in one go to their HTTPS counterpart. * A new `wp_update_urls_to_https()` function takes care of the update routine. * A new `update_https` meta capability is introduced to control access. * If the site's URLs are controlled by constants, this update is not automatically possible, so in these scenarios the user is informed about that in the HTTPS status check in Site Health. * Allow hosting providers to modify the URLs linked to in the HTTPS status check in Site Health, similar to how that is possible for the URLs around updating the PHP version. * A `WP_UPDATE_HTTPS_URL` environment variable or `wp_update_https_url` filter can be used to provide a custom URL with guidance about updating the site to use HTTPS. * A `WP_DIRECT_UPDATE_HTTPS_URL` environment variable or `wp_direct_update_https_url` filter can be used to provide a custom URL for the primary CTA to update the site to use HTTPS. Props flixos90, timothyblynjacobs. Fixes #51437. Built from https://develop.svn.wordpress.org/trunk@50131 git-svn-id: http://core.svn.wordpress.org/trunk@49810 1a063a9b-81f0-0310-95a4-ce76da25c4cd
2021-02-01 19:10:01 -05:00
case 'update_https':
if ( is_multisite() && ! is_super_admin( $user_id ) ) {
$caps[] = 'do_not_allow';
} else {
$caps[] = 'manage_options';
$caps[] = 'update_core';
}
break;
case 'export_others_personal_data':
case 'erase_others_personal_data':
case 'manage_privacy_options':
$caps[] = is_multisite() ? 'manage_network' : 'manage_options';
break;
case 'create_app_password':
case 'list_app_passwords':
case 'read_app_password':
case 'edit_app_password':
case 'delete_app_passwords':
case 'delete_app_password':
$caps = map_meta_cap( 'edit_user', $user_id, $args[0] );
break;
default:
// Handle meta capabilities for custom post types.
global $post_type_meta_caps;
if ( isset( $post_type_meta_caps[ $cap ] ) ) {
return map_meta_cap( $post_type_meta_caps[ $cap ], $user_id, ...$args );
}
// Block capabilities map to their post equivalent.
$block_caps = array(
'edit_blocks',
'edit_others_blocks',
'publish_blocks',
'read_private_blocks',
'delete_blocks',
'delete_private_blocks',
'delete_published_blocks',
'delete_others_blocks',
'edit_private_blocks',
'edit_published_blocks',
);
if ( in_array( $cap, $block_caps, true ) ) {
$cap = str_replace( '_blocks', '_posts', $cap );
}
// If no meta caps match, return the original cap.
$caps[] = $cap;
}
/**
* Filters the primitive capabilities required of the given user to satisfy the
* capability being checked.
*
* @since 2.8.0
*
* @param string[] $caps Primitive capabilities required of the user.
* @param string $cap Capability being checked.
* @param int $user_id The user ID.
* @param array $args Adds context to the capability check, typically
* starting with an object ID.
*/
return apply_filters( 'map_meta_cap', $caps, $cap, $user_id, $args );
}
/**
* Returns whether the current user has the specified capability.
*
* This function also accepts an ID of an object to check against if the capability is a meta capability. Meta
* capabilities such as `edit_post` and `edit_user` are capabilities used by the `map_meta_cap()` function to
* map to primitive capabilities that a user or role has, such as `edit_posts` and `edit_others_posts`.
*
* Example usage:
*
* current_user_can( 'edit_posts' );
* current_user_can( 'edit_post', $post->ID );
* current_user_can( 'edit_post_meta', $post->ID, $meta_key );
*
* While checking against particular roles in place of a capability is supported
* in part, this practice is discouraged as it may produce unreliable results.
*
* Note: Will always return true if the current user is a super admin, unless specifically denied.
*
* @since 2.0.0
* @since 5.3.0 Formalized the existing and already documented `...$args` parameter
* by adding it to the function signature.
*
* @see WP_User::has_cap()
* @see map_meta_cap()
*
* @param string $capability Capability name.
* @param mixed ...$args Optional further parameters, typically starting with an object ID.
* @return bool Whether the current user has the given capability. If `$capability` is a meta cap and `$object_id` is
* passed, whether the current user has the given meta capability for the given object.
*/
function current_user_can( $capability, ...$args ) {
$current_user = wp_get_current_user();
if ( empty( $current_user ) ) {
return false;
}
return $current_user->has_cap( $capability, ...$args );
}
/**
* Returns whether the current user has the specified capability for a given site.
*
* This function also accepts an ID of an object to check against if the capability is a meta capability. Meta
* capabilities such as `edit_post` and `edit_user` are capabilities used by the `map_meta_cap()` function to
* map to primitive capabilities that a user or role has, such as `edit_posts` and `edit_others_posts`.
*
* Example usage:
*
* current_user_can_for_blog( $blog_id, 'edit_posts' );
* current_user_can_for_blog( $blog_id, 'edit_post', $post->ID );
* current_user_can_for_blog( $blog_id, 'edit_post_meta', $post->ID, $meta_key );
*
* @since 3.0.0
* @since 5.3.0 Formalized the existing and already documented `...$args` parameter
* by adding it to the function signature.
*
* @param int $blog_id Site ID.
* @param string $capability Capability name.
* @param mixed ...$args Optional further parameters, typically starting with an object ID.
* @return bool Whether the user has the given capability.
*/
function current_user_can_for_blog( $blog_id, $capability, ...$args ) {
$switched = is_multisite() ? switch_to_blog( $blog_id ) : false;
$current_user = wp_get_current_user();
if ( empty( $current_user ) ) {
if ( $switched ) {
restore_current_blog();
}
return false;
}
$can = $current_user->has_cap( $capability, ...$args );
if ( $switched ) {
restore_current_blog();
}
return $can;
}
/**
* Returns whether the author of the supplied post has the specified capability.
*
* This function also accepts an ID of an object to check against if the capability is a meta capability. Meta
* capabilities such as `edit_post` and `edit_user` are capabilities used by the `map_meta_cap()` function to
* map to primitive capabilities that a user or role has, such as `edit_posts` and `edit_others_posts`.
*
* Example usage:
*
* author_can( $post, 'edit_posts' );
* author_can( $post, 'edit_post', $post->ID );
* author_can( $post, 'edit_post_meta', $post->ID, $meta_key );
*
* @since 2.9.0
* @since 5.3.0 Formalized the existing and already documented `...$args` parameter
* by adding it to the function signature.
*
* @param int|WP_Post $post Post ID or post object.
* @param string $capability Capability name.
* @param mixed ...$args Optional further parameters, typically starting with an object ID.
* @return bool Whether the post author has the given capability.
*/
function author_can( $post, $capability, ...$args ) {
$post = get_post( $post );
if ( ! $post ) {
return false;
}
$author = get_userdata( $post->post_author );
if ( ! $author ) {
return false;
}
return $author->has_cap( $capability, ...$args );
}
/**
* Returns whether a particular user has the specified capability.
*
* This function also accepts an ID of an object to check against if the capability is a meta capability. Meta
* capabilities such as `edit_post` and `edit_user` are capabilities used by the `map_meta_cap()` function to
* map to primitive capabilities that a user or role has, such as `edit_posts` and `edit_others_posts`.
*
* Example usage:
*
* user_can( $user->ID, 'edit_posts' );
* user_can( $user->ID, 'edit_post', $post->ID );
* user_can( $user->ID, 'edit_post_meta', $post->ID, $meta_key );
*
* @since 3.1.0
* @since 5.3.0 Formalized the existing and already documented `...$args` parameter
* by adding it to the function signature.
*
* @param int|WP_User $user User ID or object.
* @param string $capability Capability name.
* @param mixed ...$args Optional further parameters, typically starting with an object ID.
* @return bool Whether the user has the given capability.
*/
function user_can( $user, $capability, ...$args ) {
if ( ! is_object( $user ) ) {
$user = get_userdata( $user );
}
if ( ! $user || ! $user->exists() ) {
return false;
}
return $user->has_cap( $capability, ...$args );
}
/**
* Retrieves the global WP_Roles instance and instantiates it if necessary.
*
* @since 4.3.0
*
* @global WP_Roles $wp_roles WordPress role management object.
*
* @return WP_Roles WP_Roles global instance if not already instantiated.
*/
function wp_roles() {
global $wp_roles;
if ( ! isset( $wp_roles ) ) {
$wp_roles = new WP_Roles();
}
return $wp_roles;
}
/**
* Retrieve role object.
*
* @since 2.0.0
*
* @param string $role Role name.
* @return WP_Role|null WP_Role object if found, null if the role does not exist.
*/
function get_role( $role ) {
return wp_roles()->get_role( $role );
}
/**
* Add role, if it does not exist.
*
* @since 2.0.0
*
* @param string $role Role name.
* @param string $display_name Display name for role.
* @param bool[] $capabilities List of capabilities keyed by the capability name,
* e.g. array( 'edit_posts' => true, 'delete_posts' => false ).
* @return WP_Role|null WP_Role object if role is added, null if already exists.
*/
function add_role( $role, $display_name, $capabilities = array() ) {
if ( empty( $role ) ) {
return;
}
return wp_roles()->add_role( $role, $display_name, $capabilities );
}
/**
* Remove role, if it exists.
*
* @since 2.0.0
*
* @param string $role Role name.
*/
function remove_role( $role ) {
wp_roles()->remove_role( $role );
}
/**
* Retrieve a list of super admins.
*
* @since 3.0.0
*
* @global array $super_admins
*
* @return string[] List of super admin logins.
*/
function get_super_admins() {
global $super_admins;
if ( isset( $super_admins ) ) {
return $super_admins;
} else {
return get_site_option( 'site_admins', array( 'admin' ) );
}
}
/**
* Determine if user is a site admin.
*
* @since 3.0.0
*
* @param int|false $user_id Optional. The ID of a user. Defaults to false, to check the current user.
* @return bool Whether the user is a site admin.
*/
function is_super_admin( $user_id = false ) {
if ( ! $user_id || get_current_user_id() == $user_id ) {
$user = wp_get_current_user();
} else {
$user = get_userdata( $user_id );
}
if ( ! $user || ! $user->exists() ) {
return false;
}
if ( is_multisite() ) {
$super_admins = get_super_admins();
if ( is_array( $super_admins ) && in_array( $user->user_login, $super_admins, true ) ) {
return true;
}
} else {
if ( $user->has_cap( 'delete_users' ) ) {
return true;
}
}
return false;
}
/**
* Grants Super Admin privileges.
*
* @since 3.0.0
*
* @global array $super_admins
*
* @param int $user_id ID of the user to be granted Super Admin privileges.
* @return bool True on success, false on failure. This can fail when the user is
* already a super admin or when the `$super_admins` global is defined.
*/
function grant_super_admin( $user_id ) {
// If global super_admins override is defined, there is nothing to do here.
if ( isset( $GLOBALS['super_admins'] ) || ! is_multisite() ) {
return false;
}
/**
* Fires before the user is granted Super Admin privileges.
*
* @since 3.0.0
*
* @param int $user_id ID of the user that is about to be granted Super Admin privileges.
*/
do_action( 'grant_super_admin', $user_id );
// Directly fetch site_admins instead of using get_super_admins().
$super_admins = get_site_option( 'site_admins', array( 'admin' ) );
$user = get_userdata( $user_id );
if ( $user && ! in_array( $user->user_login, $super_admins, true ) ) {
$super_admins[] = $user->user_login;
update_site_option( 'site_admins', $super_admins );
/**
* Fires after the user is granted Super Admin privileges.
*
* @since 3.0.0
*
* @param int $user_id ID of the user that was granted Super Admin privileges.
*/
do_action( 'granted_super_admin', $user_id );
return true;
}
return false;
}
/**
* Revokes Super Admin privileges.
*
* @since 3.0.0
*
* @global array $super_admins
*
* @param int $user_id ID of the user Super Admin privileges to be revoked from.
* @return bool True on success, false on failure. This can fail when the user's email
* is the network admin email or when the `$super_admins` global is defined.
*/
function revoke_super_admin( $user_id ) {
// If global super_admins override is defined, there is nothing to do here.
if ( isset( $GLOBALS['super_admins'] ) || ! is_multisite() ) {
return false;
}
/**
* Fires before the user's Super Admin privileges are revoked.
*
* @since 3.0.0
*
* @param int $user_id ID of the user Super Admin privileges are being revoked from.
*/
do_action( 'revoke_super_admin', $user_id );
// Directly fetch site_admins instead of using get_super_admins().
$super_admins = get_site_option( 'site_admins', array( 'admin' ) );
$user = get_userdata( $user_id );
if ( $user && 0 !== strcasecmp( $user->user_email, get_site_option( 'admin_email' ) ) ) {
$key = array_search( $user->user_login, $super_admins, true );
if ( false !== $key ) {
unset( $super_admins[ $key ] );
update_site_option( 'site_admins', $super_admins );
/**
* Fires after the user's Super Admin privileges are revoked.
*
* @since 3.0.0
*
* @param int $user_id ID of the user Super Admin privileges were revoked from.
*/
do_action( 'revoked_super_admin', $user_id );
return true;
}
}
return false;
}
/**
* Filters the user capabilities to grant the 'install_languages' capability as necessary.
*
* A user must have at least one out of the 'update_core', 'install_plugins', and
* 'install_themes' capabilities to qualify for 'install_languages'.
*
* @since 4.9.0
*
* @param bool[] $allcaps An array of all the user's capabilities.
* @return bool[] Filtered array of the user's capabilities.
*/
function wp_maybe_grant_install_languages_cap( $allcaps ) {
if ( ! empty( $allcaps['update_core'] ) || ! empty( $allcaps['install_plugins'] ) || ! empty( $allcaps['install_themes'] ) ) {
$allcaps['install_languages'] = true;
}
return $allcaps;
}
/**
* Filters the user capabilities to grant the 'resume_plugins' and 'resume_themes' capabilities as necessary.
*
* @since 5.2.0
*
* @param bool[] $allcaps An array of all the user's capabilities.
* @return bool[] Filtered array of the user's capabilities.
*/
function wp_maybe_grant_resume_extensions_caps( $allcaps ) {
// Even in a multisite, regular administrators should be able to resume plugins.
if ( ! empty( $allcaps['activate_plugins'] ) ) {
$allcaps['resume_plugins'] = true;
}
// Even in a multisite, regular administrators should be able to resume themes.
if ( ! empty( $allcaps['switch_themes'] ) ) {
$allcaps['resume_themes'] = true;
}
return $allcaps;
}
/**
* Filters the user capabilities to grant the 'view_site_health_checks' capabilities as necessary.
*
* @since 5.2.2
*
* @param bool[] $allcaps An array of all the user's capabilities.
* @param string[] $caps Required primitive capabilities for the requested capability.
* @param array $args {
* Arguments that accompany the requested capability check.
*
* @type string $0 Requested capability.
* @type int $1 Concerned user ID.
* @type mixed ...$2 Optional second and further parameters, typically object ID.
* }
* @param WP_User $user The user object.
* @return bool[] Filtered array of the user's capabilities.
*/
function wp_maybe_grant_site_health_caps( $allcaps, $caps, $args, $user ) {
if ( ! empty( $allcaps['install_plugins'] ) && ( ! is_multisite() || is_super_admin( $user->ID ) ) ) {
$allcaps['view_site_health_checks'] = true;
}
return $allcaps;
}
return;
// Dummy gettext calls to get strings in the catalog.
/* translators: User role for administrators. */
_x( 'Administrator', 'User role' );
/* translators: User role for editors. */
_x( 'Editor', 'User role' );
/* translators: User role for authors. */
_x( 'Author', 'User role' );
/* translators: User role for contributors. */
_x( 'Contributor', 'User role' );
/* translators: User role for subscribers. */
_x( 'Subscriber', 'User role' );