PDFMerger类重新声明问题

I have to merge two PDF files - PDF, created by TCPDF and existing file. I've tried to use PDFMerger library (http://pdfmerger.codeplex.com/) for that, but simple object creation

$merger = new PDFMerger;

throws that fatal error:

PHP Fatal error: Cannot redeclare class FPDF in /home/roman/www/comfin/plugins/wiPDFMergerPlugin/lib/PDFMerger/fpdi/fpdi2tcpdf_bridge.php on line 171

Maybe someone know how can I fix that or can advice another way to merge two PDF.

Don't know how fpdi2tcpdf_bridge should work - class redeclare problem appears. But for my needs quick fix was just not use it.

//    require_once('fpdi2tcpdf_bridge.php');

in fpdi.php.