setDelimiter(',') ->setEnclosure('') ->setLineEnding("\r\n") ->setSheetIndex(0) ->save(str_replace('.php', '.csv', __FILE__)); echo date('H:i:s') . " Read from CSV format\n"; $objReader = PHPExcel_IOFactory::createReader('CSV') ->setDelimiter(',') ->setEnclosure('') ->setLineEnding("\r\n") ->setSheetIndex(0); $objPHPExcelFromCSV = $objReader->load(str_replace('.php', '.csv', __FILE__)); echo date('H:i:s') . " Write to Excel2007 format\n"; $objWriter2007 = PHPExcel_IOFactory::createWriter($objPHPExcelFromCSV, 'Excel2007'); $objWriter2007->save(str_replace('.php', '.xlsx', __FILE__)); // Echo memory peak usage echo date('H:i:s') . " Peak memory usage: " . (memory_get_peak_usage(true) / 1024 / 1024) . " MB\r\n"; // Echo done echo date('H:i:s') . " Done writing files.\r\n";