php实现csv文件导入mysql数据库

<?php
$username="root";
$userpass="123";
$dbhost="localhost";
$dbdatabase="credits2stakes";
//生成一个连接
$db_connect=mysql_connect($dbhost,$username,$userpass) or die("Unable to connect to the MySQL!");

//选择一个需要操作的数据库
mysql_select_db($dbdatabase,$db_connect);

<meta http-equiv="Content-Type"content="text/html; charset=utf-8" />
<form name="frm1" enctype="multipart/form-data" action="insertdb.php" method="post">
   <input name="filename" type="file" /><input name="submit" type="submit" value="import" />
</form>

<?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("./config.db.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]);
    $sql="insert into inviter(inviter,invitees,time) value($arr_result[1],$arr_result[2],$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);

?>