php学习笔记（十）文件的上传与下载
<?php/**
* 文件上传和下载
* 1.表单提交
* 表单必须要改的method="post"
* enctype="multipart/form-data"
* php.ini:
* file_uploads=On;
* upload_max_filesize = 2M;//上传限制
* post_max_size = 8M;//表单传递的最大尺寸
* $myfile1：可以用来控制上传文件的类型
* type是MIME类型：网络
* text
* text/html
* text/plain
* image
* image/gif
* image/jpeg
* image/png
* audio
* audio/x-midi .mid .midi
* audio/x-wav
* video
* video/quicktime .qt .mov
* video/mpeg .mpeg
* application
* application/pdf
* application/msword .doc .dot
* application/vnd.ms-excel .xls
* application/vnd.ms-powerpoint .ppt
* application/zip .zip
* application/rar .rar
* application/xml .xml
* application/mshelp .hlp .chm
* application/octet-stream .ext .bin .com .dll
* multipart
* message
* 2.对文件的操作
* 上传文件拷贝的函数：
* move_uploaded_file()
* error的提示符及原因:
* case 1:上传文件超过了upload_max_filesize这个值
* case 2:上传文件超过了表单中MAX_FILE_SIZE选项指定的值
* case 3:文件只有部分被上传
* case 4:没有文件上传
*
* 3.下载文件（在下载页面，只允许写如下代码，不可以写其他的html多余代码）
* 对于图片和html或者php下载应该写头
* header();方法前不许有输出，即使是html也不可以
* 图片下载：
header("Content-type:image/jpeg");
//设置下载文件
header('Content-disposition:attachment:filename='.$filename);
*
*/
$filename = "one.html";
//设置下载类型
header("Content-type:text/html");
//设置下载文件
header('Content-Disposition:attachment;filename='.$filename);
//设置文件下载大小
header("Content-Length:".filesize($filename));
$fp = fopen($filename, "r");
while (feof($fp)==FALSE){
echo fread($fp, 1024);
}
fclose($fp);
?>
<html>
<head>
<title>文件上传</title>
</head>
<body>
<form action="" method="post" enctype="multipart/form-data">
用户名：<input type="text" name="username"><br>
密码：<input type="password"" name="password"><br>
<hr><br>
<input type="file" name="myfile1">
<input type="hidden" name="MAX_FILE_SIZE" value="100000">
<input type="file" name="myfile2">
<input type="file" name="myfile[]">
<input type="file" name="myfile[]">
<input type="file" name="myfile[]">
<input type="file" name="myfile[]">
<input type="file" name="myfile[]">
<input type="file" name="myfile[]">
<input type="file" name="myfile[]">
<input type="submit" value="提交"><br>
</form>
</body>
</html>
<?php
$username = $_POST["username"];
$password = $_POST["password"];
//可以重名；然后按照数组来取值
$myfile1 = $_FILES["myfile1"];
$myfile2 = $_FILES["myfile2"];
$name3 = $_FILES["myfile"];
$name4 = $_FILES["myfile"];
$name5 = $_FILES["myfile"];
print_r($_FILES)."<br>";
echo "用户名：".$username."密码：".$password."<br>";
echo "文件一名：".$myfile1."<br>";
echo "文件一类型：".$myfile1."<br>";
echo "文件一文件路径：".$myfile1."<br>";
echo "文件一错误信息：".$myfile1."<br>";
echo "文件二：".$myfile2."<br>";
echo "文件三：".$name3."<br>";
echo "文件四：".$name4."<br>";
echo "文件五：".$name5."<br>";
$uploadfile = $myfile1;
$copyto = "test/".time().$uploadfile;
if (is_uploaded_file($uploadfile)){
if (move_uploaded_file($uploadfile, $copyto)){
echo "上传文件成功<br>";
}else{
echo "上传文件失败<br>";
}
}
?>
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