如何使用php通过PHPExcel导入Excel表格到MySQL数据库？

<?php

define('BASE_URL', realpath(dirname(__FILE__)));
require_once BASE_URL . '/PHPExcel/PHPExcel.php';//引入PHPExcel类文件

//excel文件的地址
$excel_fiel_path = './phpexcel.xls';


$PHPExcel = new PHPExcel();// 实例化PHPExcel工具类
//分析文件获取后缀判断是2007版本还是2003
$extend = pathinfo("./" . $excel_fiel_path);
$extend = strtolower($extend["extension"]); 
// 判断xlsx版本，如果是xlsx的就是2007版本的，否则就是2003
if ($extend=="xlsx") {
 $PHPReader = new PHPExcel_Reader_Excel2007();
 $PHPExcel = $PHPReader->load("./" . $excel_fiel_path);
}else{
 $PHPReader = new PHPExcel_Reader_Excel5();
 $PHPExcel = $PHPReader->load("./" . $excel_fiel_path);
}

 /* 第二种方法*/
$objWorksheet = $PHPExcel->getActiveSheet();
$highestRow = $objWorksheet->getHighestRow(); 
echo 'highestRow='.$highestRow;
echo "<br>";
$highestColumn = $objWorksheet->getHighestColumn();
$highestColumnIndex = PHPExcel_Cell::columnIndexFromString($highestColumn);//总列数
echo 'highestColumnIndex='.$highestColumnIndex;
echo "<br>";
$headtitle=array(); 
for ($row = 2;$row <= $highestRow;$row++) 
{
 $strs=array();
 //注意highestColumnIndex的列数索引从0开始
 for ($col = 0;$col < $highestColumnIndex;$col++)
 {
  $strs[$col] =$objWorksheet->getCellByColumnAndRow($col, $row)->getValue();

 } 
 //todo
 //连接mysql ，一条条写入
 
}