PHP编程实现csv文件导入mysql数据库的方法

<?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>

<?phpsession_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);?>