เขียน php ให้พิมพ์ Report โดยใช้ Crystal Report ไม่รู้ว่าจะเริ่มต้นยังไงดี

<?php
 // Create an Crystal Object Factory.
 $o_CrObjectFactory = new COM('CrystalReports11.ObjectFactory.1');

 // Create the Crystal Reports Runtime Application.
 $o_CrApplication =
 $o_CrObjectFactory->CreateObject("CrystalRunTime.Application.11");

 // Register the typelibrary.
 com_load_typelib('CrystalDesignRunTime.Application');

 // Load the report.
 $o_CrReport = $o_CrApplication->OpenReport('C:\Report.rpt', 1); // 1
 == crOpenReportByTempCopy.

 // Logon to the database.
 $o_CrReport->Database->LogOnServer
 (
 'odbc',
 'Accounts',
 registryDatabaseLocations::Database('Accounts'),
 registryDatabaseLocations::Username('Accounts'),
 registryDatabaseLocations::Password('Accounts')
 );

 // Don't tell anyone what is going on when running live.
 $o_CrReport->DisplayProgressDialog = False;

 $s_ExportedReport = 'C:\Report.pdf';

 // Run the report and save the PDF to disk.
 $o_CrReport->ExportOptions->DiskFileName = $s_ExportedReport;
 $o_CrReport->ExportOptions->PDFExportAllPages = True;
 $o_CrReport->ExportOptions->DestinationType = 1; // Export to File
 $o_CrReport->ExportOptions->FormatType = 31; // 31 = PDF, 36 = XLS, 14 =
 DOC

 // Assign the parameters to the report.
 $m_Stuff = new Variant();

 $o_CrPeriodsParam =
 $o_CrReport->ParameterFields->GetItemByName('PeriodIDs', $m_Stuff);
 $o_CrPeriodsParam->ClearCurrentValueAndRange();

 foreach($_SESSION['tabRG_PeriodIDs'] as $i_Period)
 {
 $o_CrPeriodsParam->AddCurrentValue(intval($i_Period));
 }

 $o_CrReport->ReadRecords();
 $o_CrReport->Export(False);
?>