Moodle: Create and save an excel file in moodle filesystem

Hello,

Moodle filesystem is powerful but it's hard to understand too. In this code we will see how to create an excel file and save it in the moodle filesystem:

Documentation:
https://docs.moodle.org/dev/File_API_internals
https://docs.moodle.org/dev/File_API

// Create excel file
require_once("$CFG->libdir/phpexcel/PHPExcel.php");
$filenameTmp = tempnam(sys_get_temp_dir(), time());

$objPHPExcel = new PHPExcel();

// Excel metadata $objPHPExcel->getProperties()->setCreator("www.ibancardonasubiela.tk") ->setLastModifiedBy("www.ibancardonasubiela.tk") ->setTitle("www.ibancardonasubiela.tk") ->setSubject("www.ibancardonasubiela.tk") ->setDescription("www.ibancardonasubiela.tk")

// Crear the first sheet
$objPHPExcel->setActiveSheetIndex(0);
$objPHPExcel->getActiveSheet()->setTitle("www.ibancardonasubiela.tk");

// Header
$arrayHeader = array('aaa', 'bbb');
$countHeader = count($arrayHeader);
foreach ($arrayHeader as $pos => $value) {
$excelLetter = PHPExcel_Cell::stringFromColumnIndex($pos);
$objPHPExcel->getActiveSheet()->getStyle($excelLetter.'1')->getFont()->setSize(14);
$objPHPExcel->getActiveSheet()->getStyle($excelLetter.'1')->getFont()->setBold(true);
$objPHPExcel->getActiveSheet()->setCellValue($excelLetter.'1', $value);
$objPHPExcel->getActiveSheet()->getColumnDimension($excelLetter)->setAutoSize(true);
}

// Add content

// Save excel in a temporal file
$objWriter = new PHPExcel_Writer_Excel2007($objPHPExcel);
$objWriter->save($filenameTmp);

// Copy excel to moodle filesystem
$fs = get_file_storage();
$file_record = array(
'contextid' => 0,
'component' => 'backup', // "mod_forum", "course", "mod_assignment", "backup"...
'filearea' => 'course', // "submissions", "intro" and "content" , "blogs","userfiles"...
'itemid' => 0,
'filepath' => '/',
'timecreated' => time(),
'timemodified' => time(),
'filename' => 'excel'.'_'.time().'.xlsx'
);
$fs->create_file_from_pathname($file_record, $filenameTmp);

// Delete temp file
unlink($filenameTmp);

Best regards!