RelsRibbon.php

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<?php
class PHPExcel_Writer_Excel2007_RelsRibbon extends PHPExcel_Writer_Excel2007_WriterPart
{
        public function writeRibbonRelationships(PHPExcel $pPHPExcel = null){
                // Create XML writer
                $objWriter = null;
                if ($this->getParentWriter()->getUseDiskCaching()) {
                        $objWriter = new PHPExcel_Shared_XMLWriter(PHPExcel_Shared_XMLWriter::STORAGE_DISK, $this->getParentWriter()->getDiskCachingDirectory());
                } else {
                        $objWriter = new PHPExcel_Shared_XMLWriter(PHPExcel_Shared_XMLWriter::STORAGE_MEMORY);
                }

                // XML header
                $objWriter->startDocument('1.0','UTF-8','yes');

                // Relationships
                $objWriter->startElement('Relationships');
                $objWriter->writeAttribute('xmlns', 'http://schemas.openxmlformats.org/package/2006/relationships');
                $localRels=$pPHPExcel->getRibbonBinObjects('names');
                if(is_array($localRels)){
                        foreach($localRels as $aId=>$aTarget){
                                $objWriter->startElement('Relationship');
                                $objWriter->writeAttribute('Id', $aId);
                                $objWriter->writeAttribute('Type', 'http://schemas.openxmlformats.org/officeDocument/2006/relationships/image');
                                $objWriter->writeAttribute('Target', $aTarget);
                                $objWriter->endElement();//Relationship
                        }
                }
                $objWriter->endElement();//Relationships

                // Return
                return $objWriter->getData();

        }

}