php导入导出cvs文件格式

<?php

header("Content-type: text/html; charset=gb2312");

$fname = $_FILES['myfile']['tmp_name'];

error_reporting(0);// 导入csv格式的文件

$connect=mysql_connect("localhost","root","***") or die("could not connect to database");

mysql_select_db("mydb",$connect) or die (mysql_error());

mysql_query("set names 'gbk'");

if(file_exists($fname)){

$handle = fopen($fname, 'r');

$result = input_csv($handle); //解析csv

$len_result = count($result);

if($len_result==0){

echo '没有任何数据！';

exit;

}

for ($i = 1; $i < $len_result; $i++) { //循环获取各字段值,从1开始，不插入第一行表头

//$name = iconv('gb2312', 'utf-8', $result[$i][0]); //中文转码

//$sex = iconv('gb2312', 'utf-8', $result[$i][1]);

$name  =  $result[$i][0];

$sex  =   $result[$i][1];

$age = $result[$i][2];

$data_values .= "('$name','$sex','$age'),";

}

$data_values = substr($data_values,0,-1); //去掉最后一个逗号

fclose($handle); //关闭指针

$sql  =	 "insert into student (name,sex,age) values $data_values";

$query = mysql_query($sql);

if($query){

echo '导入成功！';

}else{

echo '导入失败！';

}
}else{

echo "文件不存在，请重新选择";exit;

}

function input_csv($handle) {

$out = array ();

$n = 0;

while ($data = fgetcsv($handle, 10000)) {

$num = count($data);

for ($i = 0; $i < $num; $i++) {

$out[$n][$i] = $data[$i];

}

$n++;

}

return $out;

}

?>

$result = mysql_query("select * from student order by id asc");
$str = "姓名,性别,年龄\n";
$str = iconv('utf-8','gb2312',$str);
while($row=mysql_fetch_array($result))
{
$name = iconv('utf-8','gb2312',$row['name']); //中文转码
$sex = iconv('utf-8','gb2312',$row['sex']);
$str .= $name.",".$sex.",".$row['age']."\n"; //用引文逗号分开
}
$filename = date('Ymd').'.csv'; //设置文件名
export_csv($filename,$str);

function export_csv($filename,$data)
{
header("Content-type:text/csv");
header("Content-Disposition:attachment;filename=".$filename);
header('Cache-Control:must-revalidate,post-check=0,pre-check=0');
header('Expires:0'); header('Pragma:public');
echo $data;
}

CREATE TABLE `student` (
`id` int(11) NOT NULL auto_increment,
`name` varchar(50) NOT NULL,
`sex` varchar(10) NOT NULL,
`age` smallint(3) NOT NULL default '0',
PRIMARY KEY  (`id`)
) ENGINE=MyISAM  DEFAULT CHARSET=utf8;