PHPExcel 读取Excel以xlsx格式的文件

<?php
require_once dirname(__FILE__) . '/Classes/PHPExcel.php';
require_once dirname(__FILE__) . '/Classes/PHPExcel/IOFactory.php';
$path = "./data.xlsx";
$fileType = PHPExcel_IOFactory::identify($path);
$objReader = PHPExcel_IOFactory::createReader($fileType);
$objPHPExcel = $objReader->load($path);
$currentSheet = $objPHPExcel->getSheet(0);

for ($i = 10; $i <= 17; $i++){
$result = (string) ($currentSheet->getCell('I'.$i)->getValue());
echo $result . "</br>";
}