上传下载

表格：
<center>
        <form action="upload_do.php" method="post" enctype="multipart/form-data">
            <table>
                <tr>
                    <td>请选择要上传的文件</td>
                    <td><input type="file" name="myfile"></td>
                </tr>
                <tr>
                    <td></td>
                    <td><input type="submit" value="提交"></td>
                </tr>
            </table>
</form>
</center>


上传：
<?php
header("content-type:text/html;charset=utf-8");
$myfile=$_FILES['myfile'];
//print_r($myfile);
if(!file_exists('load')){
    mkdir('load');
}
if(move_uploaded_file($myfile['tmp_name'],'./load/'.$myfile['name'])){
    echo "上传成功！";
}else{
    echo "上传失败！";
};


下载：
<?php
$img=$_GET['img'];
$filename=pathinfo($img);
$file=$filename['basename'];
header('content-type:application/octet-stream');
header("content-disposition:attachment;filename='$file'");
readfile($img);