使用PHP导入和导出CSV文件

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;

<form id="addform" action="do.php?action=import" method="post" enctype="multipart/form-data">    <p>请选择要导入的CSV文件：<br/><input type="file" name="file"> <input type="submit"	class="btn" value="导入CSV">    <input type="button" class="btn" value="导出CSV" onclick="window.location.href='do.php?	action=export'"></p>
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include_once ("connect.php"); //连接数据库$action = $_GET['action'];if ($action == 'import') { //导入CSV   //导入处理} elseif ($action=='export') { //导出CSV   //导出处理}

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 < $len_result; $i++) { //循环获取各字段值		$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 < $num; $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;}