GP_Project::sub_projects PHP Method

    public function sub_projects()
    {
        $sub_projects = $this->many("SELECT * FROM {$this->table} WHERE parent_project_id = %d ORDER BY active DESC, id ASC", $this->id);
        /**
         * Filter the list of sub-projects of a project.
         *
         * @since 1.0.0
         *
         * @param array  $sub_projects An array of sub projects as GP_Project.
         * @param string $project_id   ID of the current project. Can be zero at the top level.
         */
        $sub_projects = apply_filters('gp_projects', $sub_projects, $this->id);
        return $sub_projects;
    }