This method is the class constructor, it's called when an instance of the 'CustomEngine' class is created, it requires an instance of 'ReportOptions' class to pass all needed report options.

This method returns the calling object, so it can be chained with other methods in the ‘ReportOptions’ class

 
           try{
$report = new ReportOptions(SRE_PUBLIC_REPORT);
$report->select_tables(array("items"))
       ->set_grouping(array("country"))
       ->select_all_fields();
$engine = new CustomEngine($report);
$report_path = $engine->create_report();
echo "Your report URL:" . $report_path;
} catch (Exception $ex) {
   echo 'Caught exception message:  '.  $ex->getMessage();
}
            

create_report

Basic usage of Smart Report Engine
Converting Your SQL Queries To Reports