上传与下载模块

上传：

1.form

<input type="file" name="news_file">
<input type="hidden" name="MAX_FILE_SIZE" value="10485760">
<input type="submit" value="ok!">

2.上传

$message=upload($_FILES["news_file"],"uploads");
con();
mysql_query("insert into news values(null,'$title','$content','$file_name')");

3.upload 函数

function upload($file,$file_path){
	$error=$file['error'];
	switch($error){
		case 0:
		$file_name=$file['name'];
		$file_temp=$file['tmp_name'];
		$destination=$file_path."/".$file_name;
		move_uploaded_file($file_temp,$destination);
		return "文件上传成功!";
		case 1:
		return "上传附件超过了php.ini中upload_max_filesize选项限制的值!";
		case 2:
		return "上传附件的大小超过了form表单MAX_FILE_SIZE选项指定的值!";
		case 3:
		
		return "附件只有部分被上传!";
		case 4:
		return "没有选择上传附件!";
	}
}

下载：

1.连接

<a href="download.php?attachment=<?php echo $row['attachment'];?>"><?php echo $row['attachment']?></a>

2.下载

$file_name=$_GET["attachment"];
download("uploads/","$file_name");

3.download 函数

function download($file_dir,$file_name){
	if(!file_exists($file_dir.$file_name)){
		exit("文件不存在或已删除");
	}
	else
	{
		$file=fopen($file_dir.$file_name,"r");
		header("Content-Disposition:attachment;filename=".$file_name);
		echo fread($file,filesize($file_dir.$file_name));
		fclose($file);
		exit;
	}
}