通过 PHP 生成晶体报告挂起

我正在尝试使用 php 脚本生成一个水晶报告。脚本似乎在 ReadRecords（） 之后挂起;日志文件中不会生成任何错误消息。我做错了什么吗？

$my_report = "C:''inetpub''wwwroot''mamobile''reports''invoice.rpt";
$my_pdf = "C:''inetpub''wwwroot''mamobile''reports''test.pdf";
$ObjectFactory = new COM("CrystalReports115.ObjectFactory.1");
$crapp = $ObjectFactory->CreateObject("CrystalDesignRuntime.Application.11");
$creport = $crapp->OpenReport($my_report, 1);
$creport->EnableParameterPrompting = 0;
$creport->DiscardSavedData;
$creport->ReadRecords();
$creport->FormulaSyntax = 0;
$creport->RecordSelectionFormula = "{invoice.invoiceid} = 20070128114815";
$creport->ExportOptions->DiskFileName = $my_pdf;
$creport->ExportOptions->FormatType = 31;
$creport->ExportOptions->DestinationType=1;
$creport->Export(false);
$creport = null;
$crapp = null;
$ObjectFactory = null;

此代码的类似版本适用于不同的报表。

$my_report = "C:''inetpub''wwwroot''mamobile''reports''" . $name;
$my_pdf = "C:''inetpub''wwwroot''mamobile''reports''test.pdf";
$ObjectFactory = new COM("CrystalReports115.ObjectFactory.1");
$crapp = $ObjectFactory->CreateObject("CrystalDesignRuntime.Application.11");
$creport = $crapp->OpenReport($my_report, 1);
$creport->EnableParameterPrompting = 0;
$creport->DiscardSavedData;
$creport->ReadRecords();
$creport->ExportOptions->DiskFileName = $my_pdf;
$creport->ExportOptions->FormatType = 31;
$creport->ExportOptions->DestinationType=1;
$creport->Export(false);
$creport = null;
$crapp = null;
$ObjectFactory = null;