StringTable.php

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<?php
class PHPExcel_Writer_Excel2007_StringTable extends PHPExcel_Writer_Excel2007_WriterPart
{
        public function createStringTable($pSheet = null, $pExistingTable = null)
        {
                if (!is_null($pSheet)) {
                        // Create string lookup table
                        $aStringTable = array();
                        $cellCollection = null;
                        $aFlippedStringTable = null;    // For faster lookup

                        // Is an existing table given?
                        if (!is_null($pExistingTable) && is_array($pExistingTable)) {
                                $aStringTable = $pExistingTable;
                        }

                        // Fill index array
                        $aFlippedStringTable = $this->flipStringTable($aStringTable);

                        // Loop through cells
                        foreach ($pSheet->getCellCollection() as $cellID) {
                                $cell = $pSheet->getCell($cellID);
                                $cellValue = $cell->getValue();
                                if (!is_object($cellValue) &&
                                        !is_null($cellValue) &&
                                        $cellValue !== '' &&
                                        !isset($aFlippedStringTable[$cellValue]) &&
                                        ($cell->getDataType() == PHPExcel_Cell_DataType::TYPE_STRING || $cell->getDataType() == PHPExcel_Cell_DataType::TYPE_STRING2 || $cell->getDataType() == PHPExcel_Cell_DataType::TYPE_NULL)) {
                                                $aStringTable[] = $cellValue;
                                                $aFlippedStringTable[$cellValue] = 1;
                                } elseif ($cellValue instanceof PHPExcel_RichText &&
                                                  !is_null($cellValue) &&
                                                  !isset($aFlippedStringTable[$cellValue->getHashCode()])) {
                                                                $aStringTable[] = $cellValue;
                                                                $aFlippedStringTable[$cellValue->getHashCode()] = 1;
                        }
                }

                // Return
                return $aStringTable;
                } else {
                        throw new Exception("Invalid PHPExcel_Worksheet object passed.");
                }
        }

        public function writeStringTable($pStringTable = null)
        {
                if (!is_null($pStringTable)) {
                        // 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');

                        // String table
                        $objWriter->startElement('sst');
                        $objWriter->writeAttribute('xmlns', 'http://schemas.openxmlformats.org/spreadsheetml/2006/main');
                        $objWriter->writeAttribute('uniqueCount', count($pStringTable));

                                // Loop through string table
                                foreach ($pStringTable as $textElement) {
                                        $objWriter->startElement('si');

                                                if (! $textElement instanceof PHPExcel_RichText) {
                                                        $textToWrite = PHPExcel_Shared_String::ControlCharacterPHP2OOXML( $textElement );
                                                        $objWriter->startElement('t');
                                                        if ($textToWrite !== trim($textToWrite)) {
                                                                $objWriter->writeAttribute('xml:space', 'preserve');
                                                        }
                                                        $objWriter->writeRawData($textToWrite);
                                                        $objWriter->endElement();
                                                } else if ($textElement instanceof PHPExcel_RichText) {
                                                        $this->writeRichText($objWriter, $textElement);
                                                }

                    $objWriter->endElement();
                                }

                        $objWriter->endElement();

                        // Return
                        return $objWriter->getData();
                } else {
                        throw new Exception("Invalid string table array passed.");
                }
        }

        public function writeRichText(PHPExcel_Shared_XMLWriter $objWriter = null, PHPExcel_RichText $pRichText = null)
        {
                // Loop through rich text elements
                $elements = $pRichText->getRichTextElements();
                foreach ($elements as $element) {
                        // r
                        $objWriter->startElement('r');

                                // rPr
                                if ($element instanceof PHPExcel_RichText_Run) {
                                        // rPr
                                        $objWriter->startElement('rPr');

                                                // rFont
                                                $objWriter->startElement('rFont');
                                                $objWriter->writeAttribute('val', $element->getFont()->getName());
                                                $objWriter->endElement();

                                                // Bold
                                                $objWriter->startElement('b');
                                                $objWriter->writeAttribute('val', ($element->getFont()->getBold() ? 'true' : 'false'));
                                                $objWriter->endElement();

                                                // Italic
                                                $objWriter->startElement('i');
                                                $objWriter->writeAttribute('val', ($element->getFont()->getItalic() ? 'true' : 'false'));
                                                $objWriter->endElement();

                                                // Superscript / subscript
                                                if ($element->getFont()->getSuperScript() || $element->getFont()->getSubScript()) {
                                                        $objWriter->startElement('vertAlign');
                                                        if ($element->getFont()->getSuperScript()) {
                                                                $objWriter->writeAttribute('val', 'superscript');
                                                        } else if ($element->getFont()->getSubScript()) {
                                                                $objWriter->writeAttribute('val', 'subscript');
                                                        }
                                                        $objWriter->endElement();
                                                }

                                                // Strikethrough
                                                $objWriter->startElement('strike');
                                                $objWriter->writeAttribute('val', ($element->getFont()->getStrikethrough() ? 'true' : 'false'));
                                                $objWriter->endElement();

                                                // Color
                                                $objWriter->startElement('color');
                                                $objWriter->writeAttribute('rgb', $element->getFont()->getColor()->getARGB());
                                                $objWriter->endElement();

                                                // Size
                                                $objWriter->startElement('sz');
                                                $objWriter->writeAttribute('val', $element->getFont()->getSize());
                                                $objWriter->endElement();

                                                // Underline
                                                $objWriter->startElement('u');
                                                $objWriter->writeAttribute('val', $element->getFont()->getUnderline());
                                                $objWriter->endElement();

                                        $objWriter->endElement();
                                }

                                // t
                                $objWriter->startElement('t');
                                $objWriter->writeAttribute('xml:space', 'preserve');
                                $objWriter->writeRawData(PHPExcel_Shared_String::ControlCharacterPHP2OOXML( $element->getText() ));
                                $objWriter->endElement();

                        $objWriter->endElement();
                }
        }

        public function flipStringTable($stringTable = array()) {
                // Return value
                $returnValue = array();

                // Loop through stringtable and add flipped items to $returnValue
                foreach ($stringTable as $key => $value) {
                        if (! $value instanceof PHPExcel_RichText) {
                                $returnValue[$value] = $key;
                        } else if ($value instanceof PHPExcel_RichText) {
                                $returnValue[$value->getHashCode()] = $key;
                        }
                }

                // Return
                return $returnValue;
        }
}