public function writeComments(\PhpOffice\PhpSpreadsheet\Worksheet\Worksheet $pWorksheet)
    {
        // Create XML writer
        $objWriter = null;
        if ($this->getParentWriter()->getUseDiskCaching()) {
            $objWriter = new XMLWriter(XMLWriter::STORAGE_DISK, $this->getParentWriter()->getDiskCachingDirectory());
        } else {
            $objWriter = new XMLWriter(XMLWriter::STORAGE_MEMORY);
        }

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

        // Comments cache
        $comments = $pWorksheet->getComments();

        // Authors cache
        $authors = [];
        $authorId = 0;
        foreach ($comments as $comment) {
            if (!isset($authors[$comment->getAuthor()])) {
                $authors[$comment->getAuthor()] = $authorId++;
            }
        }

        // comments
        $objWriter->startElement('comments');
        $objWriter->writeAttribute('xmlns', 'http://schemas.openxmlformats.org/spreadsheetml/2006/main');

        // Loop through authors
        $objWriter->startElement('authors');
        foreach ($authors as $author => $index) {
            $objWriter->writeElement('author', $author);
        }
        $objWriter->endElement();

        // Loop through comments
        $objWriter->startElement('commentList');
        foreach ($comments as $key => $value) {
            $this->writeComment($objWriter, $key, $value, $authors);
        }
        $objWriter->endElement();

        $objWriter->endElement();

        // Return
        return $objWriter->getData();
    }
public function writeComments(\PhpOffice\PhpSpreadsheet\Worksheet\Worksheet $pWorksheet)
    {
        // Create XML writer
        $objWriter = null;
        if ($this->getParentWriter()->getUseDiskCaching()) {
            $objWriter = new XMLWriter(XMLWriter::STORAGE_DISK, $this->getParentWriter()->getDiskCachingDirectory());
        } else {
            $objWriter = new XMLWriter(XMLWriter::STORAGE_MEMORY);
        }

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

        // Comments cache
        $comments = $pWorksheet->getComments();

        // Authors cache
        $authors = [];
        $authorId = 0;
        foreach ($comments as $comment) {
            if (!isset($authors[$comment->getAuthor()])) {
                $authors[$comment->getAuthor()] = $authorId++;
            }
        }

        // comments
        $objWriter->startElement('comments');
        $objWriter->writeAttribute('xmlns', 'http://schemas.openxmlformats.org/spreadsheetml/2006/main');

        // Loop through authors
        $objWriter->startElement('authors');
        foreach ($authors as $author => $index) {
            $objWriter->writeElement('author', $author);
        }
        $objWriter->endElement();

        // Loop through comments
        $objWriter->startElement('commentList');
        foreach ($comments as $key => $value) {
            $this->writeComment($objWriter, $key, $value, $authors);
        }
        $objWriter->endElement();

        $objWriter->endElement();

        // Return
        return $objWriter->getData();
    }
public function writeComments ( \ PhpOffice \ PhpSpreadsheet \ Worksheet \ Worksheet $ pWorksheet ) { // Create XML writer $ objWriter = null ; if ( $ this -> getParentWriter ( ) -> getUseDiskCaching ( ) ) { $ objWriter = new XMLWriter ( XMLWriter :: STORAGE_DISK , $ this -> getParentWriter ( ) -> getDiskCachingDirectory ( ) ) ; } else { $ objWriter = new XMLWriter ( XMLWriter :: STORAGE_MEMORY ) ; } // XML header $ objWriter -> startDocument ( '1.0' , 'UTF-8' , 'yes' ) ; // Comments cache $ comments = $ pWorksheet -> getComments ( ) ; // Authors cache $ authors = [ ] ; $ authorId = 0 ; foreach ( $ comments as $ comment ) { if ( ! isset ( $ authors [ $ comment -> getAuthor ( ) ] ) ) { $ authors [ $ comment -> getAuthor ( ) ] = $ authorId ++ ; } } // comments $ objWriter -> startElement ( 'comments' ) ; $ objWriter -> writeAttribute ( 'xmlns' , 'http://schemas.openxmlformats.org/spreadsheetml/2006/main' ) ; // Loop through authors $ objWriter -> startElement ( 'authors' ) ; foreach ( $ authors as $ author => $ index ) { $ objWriter -> writeElement ( 'author' , $ author ) ; } $ objWriter -> endElement ( ) ; // Loop through comments $ objWriter -> startElement ( 'commentList' ) ; foreach ( $ comments as $ key => $ value ) { $ this -> writeComment ( $ objWriter , $ key , $ value , $ authors ) ; } $ objWriter -> endElement ( ) ; $ objWriter -> endElement ( ) ; // Return return $ objWriter -> getData ( ) ; }
Write comments to XML format.

@param \PhpOffice\PhpSpreadsheet\Worksheet\Worksheet $pWorksheet

@throws \PhpOffice\PhpSpreadsheet\Writer\Exception

@return string XML Output
Write comments to XML format .