staylor / WordPress

	 * @param string $cap Capability name.

	 * @param bool $grant Optional, default is true. Whether role is capable of performing capability.

	 */

	public function add_cap( $role, $cap, $grant = true ) {

		if ( ! isset( $this->roles[$role] ) )

			return;

		$this->roles[$role]['capabilities'][$cap] = $grant;

		if ( $this->use_db )

			update_option( $this->role_key, $this->roles );

	}

	/**

	 * Remove capability from role.

	 * @param string $role Role name.

	 * @param string $cap Capability name.

	 */

	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 );

	}

	/**

	 * Retrieve role object by name.