php基础练习--多文件上传和下载

php基础练习--多文件上传和下载:

<html>

<head>

    <meta charset="utf-8">

    <title>index_uploads</title>

</head>

<body>

    <form action="uploads.php" method="post" enctype="multipart/form-data">

        <input type="file" name="file[]">

        <br>

        <input type="file" name="file[]">

        <br>

        <input type="file" name="file[]">

        <br>

        <input type="file" name="file[]">

        <br>

        <input type="file" name="file[]">

        <br>

        <input type="submit" value="uploads">

    </form>

</body>

</html>
index_uploads.php
<?php

    echo "<pre>";

    print_r($_FILES);

    echo "</pre>";



    $count = count($_FILES['file']['name']);



    for ($i = 0; $i < $count; $i++) {

        $tmpfile = $_FILES['file']['tmp_name'][$i];

        $filefix = array_pop(explode(".", $_FILES['file']['name'][$i]));

        $dstfile = "uploads/files/".time()."_".mt_rand().".".$filefix;



        if (move_uploaded_file($tmpfile, $dstfile)) {

            echo "<script>alert('succeed!');window.location.href='listdir.php';</script>";

        } else {

            echo "<script>alert('fail!');window.location.href='index_uploads.php';</script>";

        }

    }
uploads.php
<?php

    header("content-type:text/html;charset=utf-8");

    $dirname = "uploads/files";



    function listdir($dirname) {

        $ds = opendir($dirname);

        while ($file = readdir($ds)) {

            $path = $dirname.'/'.$file;

            if ($file != '.' && $file != '..'){

                if (is_dir($path)) {

                    listdir($path);

                } else {

                    echo "<tr>";

                    echo "<td><img src='$path'></td>";

                    echo "<td><a href='download.php?imgfile=$file'>Download</a></td>";

                    echo "</tr>";

                }

            }

        }

    }

    

    echo "<h2>图片下载|<a href='index_uploads.php'>图片上传</a></h2>";

    echo "<table width='700px' border='1px'>";

    listdir($dirname);

    echo "</table>";
listdir.php
<?php

    $imgfile = $_GET['imgfile'];

    $path = './uploads/files/'.$imgfile;

    $imgsize = filesize($path);



    header("content-type:application/octet-stream");

    header("content-disposition:attachment;filename={$imgfile}");

    header("content-length:{$imgsize}");

    readfile($path);
download.php

核心:下载:

header("content-type:application/octet-stream");

header("content-disposition:attachment;filename={$imgfile}");

header("content-length:{$imgsize}");

readfile($path);

 

 

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