protected function createMetaFile()
    {
        $appName = self::APP_NAME;
        $createdDate = (new \DateTime())->format(\DateTime::W3C);

        $metaXmlFileContents = <<<EOD
<?xml version="1.0" encoding="UTF-8" standalone="yes"?>
<office:document-meta office:version="1.2" xmlns:dc="http://purl.org/dc/elements/1.1/" xmlns:meta="urn:oasis:names:tc:opendocument:xmlns:meta:1.0" xmlns:office="urn:oasis:names:tc:opendocument:xmlns:office:1.0" xmlns:xlink="http://www.w3.org/1999/xlink">
    <office:meta>
        <dc:creator>$appName</dc:creator>
        <meta:creation-date>$createdDate</meta:creation-date>
        <dc:date>$createdDate</dc:date>
    </office:meta>
</office:document-meta>
EOD;

        $this->createFileWithContents($this->rootFolder, self::META_XML_FILE_NAME, $metaXmlFileContents);

        return $this;
    }
protected function createMetaFile()
    {
        $appName = self::APP_NAME;
        $createdDate = (new \DateTime())->format(\DateTime::W3C);

        $metaXmlFileContents = <<<EOD
<?xml version="1.0" encoding="UTF-8" standalone="yes"?>
<office:document-meta office:version="1.2" xmlns:dc="http://purl.org/dc/elements/1.1/" xmlns:meta="urn:oasis:names:tc:opendocument:xmlns:meta:1.0" xmlns:office="urn:oasis:names:tc:opendocument:xmlns:office:1.0" xmlns:xlink="http://www.w3.org/1999/xlink">
    <office:meta>
        <dc:creator>$appName</dc:creator>
        <meta:creation-date>$createdDate</meta:creation-date>
        <dc:date>$createdDate</dc:date>
    </office:meta>
</office:document-meta>
EOD;

        $this->createFileWithContents($this->rootFolder, self::META_XML_FILE_NAME, $metaXmlFileContents);

        return $this;
    }
protected function createMetaFile ( ) { $ appName = self :: APP_NAME ; $ createdDate = ( new \ DateTime ( ) ) -> format ( \ DateTime :: W3C ) ; $ metaXmlFileContents =  <<<EOD
<?xml version="1.0" encoding="UTF-8" standalone="yes"?>
<office:document-meta office:version="1.2" xmlns:dc="http://purl.org/dc/elements/1.1/" xmlns:meta="urn:oasis:names:tc:opendocument:xmlns:meta:1.0" xmlns:office="urn:oasis:names:tc:opendocument:xmlns:office:1.0" xmlns:xlink="http://www.w3.org/1999/xlink">
    <office:meta>
        <dc:creator>$appName</dc:creator>
        <meta:creation-date>$createdDate</meta:creation-date>
        <dc:date>$createdDate</dc:date>
    </office:meta>
</office:document-meta>
EOD ; $ this -> createFileWithContents ( $ this -> rootFolder , self :: META_XML_FILE_NAME , $ metaXmlFileContents ) ; return $ this ; }
Creates the "meta.xml" file under the root folder

@return FileSystemHelper
@throws \Box\Spout\Common\Exception\IOException If unable to create the file
Creates the meta . xml file under the root folder