Php converting from XLS to CSV destroys data.

Duration (min., sec.)
2:24
4:20
4:20
4:20
3:54

Duration(min., sec.)
0.1
0.180555556
0.180555556
0.180555556
0.1625

function convertXLStoCSV($infile, $outfile) // the function that converts the file
{
    $fileType = PHPExcel_IOFactory::identify($infile);
    $objReader = PHPExcel_IOFactory::createReader($fileType);
    $objReader->setReadDataOnly(true);
    $objPHPExcel = $objReader->load($infile);

    $writer = PHPExcel_IOFactory::createWriter($objPHPExcel, 'CSV');
    $writer->setDelimiter(",");
    //$writer->setEnclosure("");
    //$writer->save("test123.csv");
    foreach ($objPHPExcel->getWorksheetIterator() as $workSheetIndex => $worksheet) {
        $objPHPExcel->setActiveSheetIndex($workSheetIndex);
        $writer->setSheetIndex($workSheetIndex);
        $writer->save('converted/' . $outfile ."_" . $worksheet->getTitle() . ".csv");
}

$writer->setDelimiter(",");
$writer->setEnclosure("");