我在这里遇到一个小问题。我有以下表单，用于允许用户上传一个或多个文件：
<form action="RejoinReq.php" method="post" enctype="multipart/form-data">
Attachment 1: <input type="file" name="file[]" id="file" maxlength="500" accept="application/pdf,image/*" />
<input type="submit" name="submit" value="Request" />
</form>
接下来，我需要在将文件保存到服务器之前重命名文件。为此，我试图使用：
RejoinReq.php
<?php
function findexts ($filename) {
$filename = strtolower($filename);
$exts = explode(".", $_FILES["file"]["name"]);
$n = count($exts) - 1;
$exts = $exts[$n];
return $exts;
}
$ext = findexts($_FILES['file']['name']);
$target = "upload/";
$target = $target . $_SESSION['myusername'] . "Rejoin." . $ext;
if (file_exists("upload/" . $_FILES["file"]["name"])) {
//echo $_FILES["file"]["name"] . " already exists. ";
}
else {
move_uploaded_file($_FILES["file"]["tmp_name"],$target);
//echo "Stored in: " . "upload/" . $_FILES["file"]["name"];
}
已更新 - 对PHP代码的修改
警告：
findexts()期望参数1为字符串，给定数组警告：
move_uploaded_file()期望参数1为字符串，给定数组
答案 0 :(得分：2)
此代码需要完全重写才有用。
<?PHP
$filekeys=array_keys($_FILES);
foreach($filekeys as $activefile)
{
if($_FILES[$activefile]['error']==0)
{
$file= fopen($_FILES[$activefile]['tmp_name'],'r');
$content = fread($file, filesize($_FILES[$activefile]['tmp_name']));
fclose($file);
//determine $target here
$file2= fopen($target,"w");
fwrite($file2,$content);
fclose($file2);
}
}
?>
此代码适用于任意数量的文件，但您需要处理将$ target更改为每个文件的所需内容。
这有点过于复杂，但它确实允许你操纵$ content。它改编自我用于将加密文件存储在数据库中的一些代码，因此需要提取文件内容。
答案 1 :(得分：1)
在这里，这应该就是你所需要的一切！
index.html ，格式为：
<form action="RejoinReq.php" method="post" enctype="multipart/form-data">
Attachment(s): <input type="file" name="file[]" id="file" maxlength="500" accept="application/pdf,image/*" multiple>
<input type="submit" name="submit" value="Request">
</form>
接收 RejoinReq.php ：
<?php
// config
$upload_dir = '/var/www/html/upload'; // set your upload dir
$max_size = 1048576; // max file size: 1 MB
$allow_override = FALSE; // allow uploading files overriding existing ones
$valid_exts = array( // allowed extensions
'gif',
'jpeg',
'jpg',
'png',
'pdf',
);
$valid_types = array(
'image/gif',
'image/jpeg',
'image/jpg',
'image/pjpeg',
'image/x-png',
'image/png',
'text/pdf',
'application/pdf',
);
// reorganize files array
$files = array();
foreach ($_FILES['file'] as $attr => $arr) {
foreach ($arr as $k => $v) {
$files[$k][$attr] = $v;
}
}
// loop thru files
foreach ($files as $file) {
$status = 'Failure';
// get extension
$extension = pathinfo($file['name'], PATHINFO_EXTENSION);
// make sure extension and type are not empty
if ( ! (strlen($extension) && strlen($file['type']))) {
$msg = 'File extension or type not found';
}
else {
// make sure extension and type are allowed
if ( ! (in_array($file['type'], $valid_types) && in_array($extension, $valid_exts))) {
$msg = "Extension '$extension' or file type '$file[type]' is not permitted";
}
else {
// make sure file is not empty
if ( ! $file['size']) {
$msg = 'File seems to be empty (0 KB)';
}
else {
// make sure file is not too large
if ($file['size'] > $max_size) {
$msg = 'File is too large (' . ceil($file['size'] / 1024) . 'kB > ' . floor($max_size / 1024) . 'kB)';
}
else {
// rename file here as you need
$target = "$upload_dir/$_SESSION[myusername]Rejoin.$file[name]";
// make sure files don't override
if ( ! $allow_override && file_exists($target)) {
$msg = "File already exists";
}
else {
// no other errors
if ($file['error'] > 0) {
$msg = "Unknown upload error (Code: $file[error])";
}
else {
// attempt uploading
if ( ! move_uploaded_file($file['tmp_name'], $target)) {
$msg = 'Upload failed. Folder issues?';
}
else {
// all good!
$msg = 'Upload successful!';
$status = 'Success';
}
}
}
}
}
}
}
$out[] = "$file[name]: $status. $msg";
}
echo implode("\n", $out);
/* End of file */
答案 2 :(得分：0)
试试这个：
<?php
class Upload_Rename{
const ALLOWED_TYPES = "jpg,gif,png";
public static function generate_new_name($extension,$uppercase=true,$prefix='',$sufix=''){
$new_name = $prefix.uniqid().'_'.time().$sufix;
return ($uppercase ? strtoupper($new_name) : $new_name).'.'.$extension;
}
public static function check_and_get_extension($file){
$file_part = pathinfo($file);
$allowed_types = explode(",",Upload_Rename::ALLOWED_TYPES);
if(!in_array($file_part['extension'], $allowed_types)){
throw new Exception('Not ok.. bad bad file type.');
}
return $file_part['extension'];
}
public function upload($file,$target_destination){
if(!isset($file['tmp_name'])){
throw new Exception('Whaaaat?');
}
$_name = $file['name'];
$_tmp = $file['tmp_name'];
$_type = $file['type'];
$_size = $file['size'];
$file_extension = '';
try{
$file_extension = Upload_Rename::check_and_get_extension($_name);
}catch(Exception $e){
throw new Exception('Ops.. file extension? what? '.$e->getMessage());
}
$new_name = Upload_Rename::generate_new_name($file_extension,true,'whaat_','_okey');
$destination = $target_destination . DIRECTORY_SEPARATOR . $new_name;
return move_uploaded_file($_tmp, $destination);
}
public function multiple_files($files,$destination){
$number_of_files = isset($files['tmp_name']) ? sizeof($files['tmp_name']) : 0;
$errors = array();
for($i=0;$i<$number_of_files;$i++){
if(isset($files['tmp_name'][$i]) && !empty($files['tmp_name'][$i])){
try{
$this->upload(array(
'name'=>$files['name'][$i],
'tmp_name'=>$files['tmp_name'][$i],
'size'=>$files['size'][$i],
'type'=>$files['type'][$i]
),$destination);
}catch(Exception $e){
array_push($errors,array('file'=>$files['name'][$i],'error'=>$e->getMessage()));
}
}
}
print_r($errors);
}
}
if($_FILES){
$upload = new Upload_Rename();
$destination = dirname(__FILE__);
$upload->multiple_files($_FILES['myfile'],$destination);
}
?>
<form method="post" enctype="multipart/form-data">
<?php for($i=0;$i<10;$i++): ?>
file: <input type="file" name="myfile[]"><hr>
<?php endfor; ?>
<input type="submit">
</form>