Excel表格导入和导出

在libraies中引用PHPExcel这个类（phpexcel.php） public function excel_put(){     //先做一个文件上传，保存文件     $path=$_FILES['file'];     $filePath = "uploads/".$path["name"];     move_uploaded_file($path["tmp_name"],$filePath);     //$data=array('B'=>'name','C'=>'pwd','D'=>'money1','E'=>'salt');     $data=array('B'=>'name','C'=>'pid');     $tablename='city2';//表名字     $this->excel_fileput($filePath,$data,$tablename); } private function excel_fileput($filePath,$data,$tablename){     $this->load->library("phpexcel");//ci框架中引入excel类     $PHPExcel = new PHPExcel();     $PHPReader = new PHPExcel_Reader_Excel2007();     if(!$PHPReader->canRead($filePath)){         $PHPReader = new PHPExcel_Reader_Excel5();         if(!$PHPReader->canRead($filePath)){             echo 'no Excel';             return ;         }     }     // 加载excel文件     $PHPExcel = $PHPReader->load($filePath);     // 读取excel文件中的第一个工作表     $currentSheet = $PHPExcel->getSheet(0);     // 取得最大的列号     $allColumn = $currentSheet->getHighestColumn();     // 取得一共有多少行     $allRow = $currentSheet->getHighestRow();     // 从第二行开始输出，因为excel表中第一行为列名     for($currentRow = 2;$currentRow <= $allRow;$currentRow++){         /**从第A列开始输出*/         //echo $allColumn;         for($currentColumn= 'A';$currentColumn<= $allColumn; $currentColumn++){             $val = $currentSheet->getCellByColumnAndRow(ord($currentColumn) - 65,$currentRow)->getValue();             //print_r($val);             //die;             if($currentColumn == 'A')             {                 //echo $val."\t";             }else if($currentColumn <= $allColumn){                 $data1[$currentColumn]=$val;             }         }         foreach($data as $key=>$val){             $data2[$val]=$data1[$key];         }         $this->db->insert($tablename,$data2);         //print_r($data2);         //echo "</br>";     }     //echo "\n";     echo "导入成功"; } 导出数据 public function excel_out(){     header("Content-type:text/html");     header("Content-Disposition:attachment;filename=123.xls");     $array=$this->db->get("city")->result_array();     $str="id\t"."name\t"."pid\n";     foreach($array as $val){         $str.=$val['id']."\t".$val['name']."\t".$val['pid']."\n";     }     echo $str; }