php import csv to mysql database

2，执行页面insertdb.php

session_start();
header("Content-type:text/html;charset:utf-8");
//全局变量
$file=$_FILES['filename'];
$max_size="2000000"; //最大文件限制（单位：byte）
$fname=$file['name'];
$ftype=strtolower(substr(strrchr($fname,'.'),1));
 //文件格式
 $uploadfile=$file['tmp_name'];
 if($_SERVER['REQUEST_METHOD']=='POST'){
     if(is_uploaded_file($uploadfile)){
          if($file['size']>$max_size){
         echo "Import file is too large";
         exit;
         }
          if($ftype!='csv'){
         echo "Import file type is error";
          exit;
         }
     }else{
     echo "The file is not empty!";
      exit;
     }
 }
require("./conn.php");  //连接mysql数据库
$row=0;
$filename=$file['tmp_name'];
$handle=fopen($filename,'r');
while(!feof($handle) && $data=fgetcsv($handle,1000,',')){
 $arr_result=array();
 if($row==0){
   $row++;
   continue;
 }
 if($row>0 && !empty($data)){
    $num=count($data);
    for($i=0;$i<$num;$i++){
     array_push($arr_result,$data[$i]);
  }
 $name = iconv('gb2312','utf-8',$arr_result[1]);
 $sex = iconv('gb2312','utf-8',$arr_result[2]);
 $sql="insert into student(typeId,name,sex,age) value($arr_result[0],'$name','$sex',$arr_result[3])";
 //echo $sql;
 mysql_query("set names utf8");
    $result=mysql_query($sql);
 if($result){
 echo "插入成功！！！";
 }else{
 echo "插入失败！！！";
    }
  }
  $row++;
}
fclose($handle);
?>