PHPExcel을 사용하여 Excel 파일을 쓰고 읽는 방법

<?php
 $dir = dirname(__FILE__); //找出当前脚本所在路径
 /*require $dir.&#39;\lib\PHPExcel_1.8.0_doc\Classes\PHPExcel.php&#39;; //添加读取excel所需的类文件
 $objPHPExcel = new PHPExcel();   //实例化一个PHPExcel()对象
 $objSheet = $objPHPExcel->getActiveSheet(); //选取当前的sheet对象
 $objSheet->setTitle(&#39;helen&#39;);   //对当前sheet对象命名
 //常规方式：利用setCellValue()填充数据
 $objSheet->setCellValue("A1","张三")->setCellValue("B1","李四"); //利用setCellValues()填充数据
 //取巧模式：利用fromArray()填充数据
 $array = array(
 array("","B1","张三"),
 array("","B2","李四")
 );
 $objSheet->fromArray($array); //利用fromArray()直接一次性填充数据
 $objWriter = PHPExcel_IOFactory::createWriter($objPHPExcel,&#39;Excel2007&#39;); //设定写入excel的类型
 $objWriter->save($dir.&#39;/test.xlsx&#39;);*/ //保存文件
 //利用php读取excel数据
 require $dir.&#39;\lib\PHPExcel_1.8.0_doc\Classes\PHPExcel\IOFactory.php&#39;;
 $filename = $dir.&#39;\test.xlsx&#39;;
 $objPHPExcelReader = PHPExcel_IOFactory::load($filename); //加载excel文件
 foreach($objPHPExcelReader->getWorksheetIterator() as $sheet) //循环读取sheet
 {
 foreach($sheet->getRowIterator() as $row) //逐行处理
 {
  if($row->getRowIndex()<2) //确定从哪一行开始读取
  {
  continue;
  }
  foreach($row->getCellIterator() as $cell) //逐列读取
  {
  $data = $cell->getValue(); //获取cell中数据
  echo $data;
  }
  echo &#39;<br/>&#39;;
 }
 }
?>