PHP把导入和导出CSV文件到mysql数据库方法

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;

if ($action == 'import') { //导入CSV
$filename = $_FILES['file']['tmp_name'];
if (empty ($filename)) {
echo '请选择要导入的CSV文件！';
exit;
}
$handle = fopen($filename, '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 $name = iconv('gb2312', 'utf-8', $result[$i][0]); //中文转码
$sex = iconv('gb2312', 'utf-8', $result[$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
$query = mysql_query("insert into student (name,sex,age) values $data_values");//批量插入数据表中
if($query){
echo '导入成功！';
}else{
echo '导入失败！';
}
}

function input_csv($handle) {
$out = array ();
$n = 0;
while ($data = fgetcsv($handle, 10000)) {
$num = count($data);
for ($i = 0; $i $out[$n][$i] = $data[$i];
}
$n++;
}
return $out;
}

...
} elseif ($action=='export') { //导出CSV
$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); //导出
}

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;
}