conversion of xlsx into csv not work on server - php

Question

I want to import the data from xlsx file into my database for this i used phpexcel library to convert xls or xlsx file into csv and then read data.
This code is working properly to convert xls file into csv on local-host and server both but xlsx to csv conversion is done only on local-host.
here is my code:
function convertXLStoCSV($infile,$outfile)
{
$fileType = PHPExcel_IOFactory::identify($infile);
$objReader = PHPExcel_IOFactory::createReader($fileType);
$objReader->setReadDataOnly(true);
$objPHPExcel = $objReader->load($infile);
$objWriter = PHPExcel_IOFactory::createWriter($objPHPExcel, 'CSV');
$objWriter->save($outfile);
}
and call this function using:
if($ext == 'xls' or $ext == 'xlsx')
{
$new_doc_name = time() . "." .$ext;
$target_path = "../../uploaded_files/";
$target_path = $target_path . $new_doc_name ;
if ($_FILES["CSV_file"]["type"] == "application/xls" or $_FILES["CSV_file"]["type"] == "application/xlsx" or $_FILES["CSV_file"]["type"] == "application/vnd.ms-excel" or $_FILES["CSV_file"]["type"] == "application/vnd.openxmlformats-officedocument.spreadsheetml.sheet"){
if(move_uploaded_file($_FILES['CSV_file']['tmp_name'], $target_path)) {
convertXLStoCSV($target_path,'output.csv');
if(($handle = fopen("output.csv" , "r")) !== FALSE)
please help

Answer 1

Try this
$objReader = PHPExcel_IOFactory::createReader('Excel2007');
$objPHPExcel = $objReader->load($uploadFIle);
$objWorksheet = $objPHPExcel->setActiveSheetIndex(0);
$highestRow = $objWorksheet->getHighestRow();
$highestColumn = $objWorksheet->getHighestColumn();
$objWriter = PHPExcel_IOFactory::createWriter($objPHPExcel, 'CSV');
$index = 0;
foreach ($objPHPExcel->getWorksheetIterator() as $worksheet) {
$objPHPExcel->setActiveSheetIndex($index);
// write out each worksheet to it's name with CSV extension
$outFile = str_replace(array("-"," "), "_", $worksheet->getTitle()) .".csv";
$objWriter->setSheetIndex($index);
$objWriter->save($outFile);
$index++;
}