WP_Roles::remove_cap( string $role, string $cap )

Removes a capability from role.

Parameters

$rolestringrequired: Role name.
$capstringrequired: Capability name.

More Information

Changing the capabilities of a role is persistent, meaning the removed capability will stay in effect until explicitly granted.

This setting is saved to the database (in table wp_options, field 'wp_user_roles'), so you should run this only once, on theme/plugin activation and/or deactivation.

Source

public function remove_cap( $role, $cap ) {
	if ( ! isset( $this->roles[ $role ] ) ) {
		return;
	}

	unset( $this->roles[ $role ]['capabilities'][ $cap ] );
	if ( $this->use_db ) {
		update_option( $this->role_key, $this->roles );
	}
}

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Uses	Description
update_option()`wp-includes/option.php`	Updates the value of an option that was already added.

Used by	Description
WP_Role::remove_cap()`wp-includes/class-wp-role.php`	Removes a capability from a role.

Changelog

Version	Description
2.0.0	Introduced.

User Contributed Notes

Akira Tachibana 6 years ago

From Codex

/**
 * Don't let editors read private posts.
 *
 * An alternative using WP_Roles instead of WP_Role.
 *
 * You should call the function when your plugin is activated.
 *
 * @uses $wp_roles
 * @uses WP_Roles::remove_cap()
 */
function remove_editor_read_private_posts(){

	// $wp_roles is an instance of WP_Roles.
	global $wp_roles;
	$wp_roles->remove_cap( 'editor', 'read_private_posts' );
}

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