文章介紹了用php實現多文件上傳和下載的實現方法，希望可以幫助到有所需求的朋友！
核心思路：
header("content-type:application/octet-stream");
header("content-disposition:attachment;filename={$imgfile}");
header("content-length:{$imgsize}");
readfile($path);
index_uploads.php文件代碼：
<html>
<head>
<meta charset="utf-8">
<title>index_uploads</title>
</head>
<body>
<form action="uploads.php" method="post" enctype="multipart/form-data">
<input type="file" name="file[]">
<br>
<input type="file" name="file[]">
<br>
<input type="file" name="file[]">
<br>
<input type="file" name="file[]">
<br>
<input type="file" name="file[]">
<br>
<input type="submit" value="uploads">
</form>
</body>
</html>
uploads.php文件代碼：
<?php
echo "<pre>";
print_r($_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>";
}
}
listdir.php文件代碼：
<?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=$file'>Download</a></td>";
echo "</tr>";
}
}
}
}
echo "<h2>圖片下載|<a href='index_uploads.php'>圖片上傳</a></h2>";
echo "<table width='700px' border='1px'>";
listdir($dirname);
echo "</table>";
download.php文件代碼：
<?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);
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