上传多个文件到服务器，并写入数据库 [英] upload multiple files to server, and write to database

问题描述

所以目前我在我的html < input type =file中有以下代码required =requiredname =imagemultiple => $ b

然后在添加 mutliple =标签之前，这对我来说总是有效的， / b>

  if（isset（$ _ POST ['Submit']））
 {
 $ current_image = $ _ FILES [ '图像'] [ '名称']; 
 $ extension = substr（strrchr（$ current_image，'。'，1）; （（$ extension！=png）&&（$ extension！=jpg））
 {
 die（'Unknown extension'）; 
} 
 $ time = date（fYhis）; 
 $ new_image = $ time。  。 $扩展; 
 $ destination =./../ img / treatments /。new_image; 
 $ action = copy（$ _ FILES ['image'] ['tmp_name']，$ destination）; 
  

但是现在我试图上传多个文件，我想我需要添加一个数组来命名它们但我不明白，我不想更改我的代码非常多，如果我可以。

此刻img只是我的数据库中的一个字段，这个问题有多大？

编辑

代码，但似乎无法弄清楚如何实现它，并使其工作...

在尝试了许多应该修复$ _FILES数组的怪癖我没有找到任何可以使用输入名称的工作：userfile [christiaan] [] [] [is] [gaaf] []

所以我想出了这个课程

 <？php 
 / ** 
 *从$ _FILES数组中取出痛苦的类
 * @author Christiaan Baartse< [e-mail]> 
 * / 
 class UploadedFiles extends ArrayObject 
 {
 public function current（）{
 return $ this-> _normalize（parent :: current（））; 
 
 
 public function offsetGet（$ offset）{
 return $ this-> _normalize（parent :: offsetGet（$ offset））; 
 
 
保护函数_normalize（$ entry）{
 if（isset（$ entry ['name']）&& is_array（$ entry ['name']] ））{
 $ files = array（）; 
 foreach（$ entry ['name'] as $ k => $ name）{
 $ files [$ k] = array（
'name'=> $ name，$ $ b'tmp_name'=> $ entry ['tmp_name'] [$ k]，
'size'=> $ entry ['size'] [$ k]，
'type' => $ entry ['type'] [$ k]，
'error'=> $ entry ['error'] [$ k] 
）; 
} 
返回新的自我（$文件）; 
} 
 return $ entry; 
} 
} 
？> 
  

这允许您使用以下输入类型
< input type =filename =userfile [christiaan] [] [] [is] [gaaf] []/>
像

 <？php 
 $ files = new UploadedFiles（$ _ FILES） ; 
 var_dump（$ files ['userfile'] ['christiaan'] [0] [0] ['is'] ['gaaf'] [0]）; 
 //或
 foreach（$ files ['userfile'] ['christiaan'] [0] [0] ['is'] ['gaaf'] as $ file）{
后续代码var_dump（$文件）; 
} 
？> 
  

解决方案

试试这个（你的问题似乎实际上是完全不知道如何在PHP中这一切工作，而不是一些具体的问题/错误/...): $ b $ p

whatever.php：

 < form enctype =multipart / form-dataaction =<？= $ _ SERVER ['PHP_SELF']？>> 
第一个文件：< input type =filename =uploads []/>< br> 
第二档案：< input type =filename =uploads []/>< br> 
一次多个文件（firefox，chrome，... not IE< 10）：< input type =filename =uploads_multiple []multiple =multiple/>< br> 
< input type =submitvalue =Go/> 
< / form> 
<？php 
 print_r（$ _ FILES）; 
  

尝试使用不同的输入（文件大小，缺少文件...）在PHP中。我认为，如果发布一些完成的代码，您将从中受益。

编辑：另外，不要使用副本！大多数情况下它不会工作，有时可能会带来意想不到的结果，有时候你只会打开一堆蠕虫。有一个原因move_uploaded_file存在 - 使用IT！

So at the moment I have the following code in my html <input type="file" required required="required" name="image" multiple="">

and then before I added the mutliple="" tag, this always worked for me,

if(isset($_POST['Submit']))
{
$current_image=$_FILES['image']['name'];
$extension = substr(strrchr($current_image, '.'), 1);
if (($extension!= "png") && ($extension != "jpg")) 
{
die('Unknown extension');
}
$time = date("fYhis");
$new_image = $time . "." . $extension;
$destination="./../img/treatments/".$new_image;
$action = copy($_FILES['image']['tmp_name'], $destination);

but now that i am trying to upload multiple files I think I need to add an array to name them but I cannot figure it out, I don't want to change my code very much if I can.

Also at the moment the img is only one field on my database, how much of an issue is this?

EDIT

I found this code but cant seem to figure out how to implement it and make it work...

After trying dozens of ways that are supposed to fix the wonkyness of the $_FILES array I didn't find any that could work with a input name like: userfile[christiaan][][][is][gaaf][]

So I came up with this class

<?php
/**
 * A class that takes the pain out of the $_FILES array
 * @author Christiaan Baartse <[e-mail]>
 */
class UploadedFiles extends ArrayObject
{
    public function current() {
        return $this->_normalize(parent::current());
    }

    public function offsetGet($offset) {
        return $this->_normalize(parent::offsetGet($offset));
    }

    protected function _normalize($entry) {
        if(isset($entry['name']) && is_array($entry['name'])) {
            $files = array();
            foreach($entry['name'] as $k => $name) {
                $files[$k] = array(
                    'name' => $name,
                    'tmp_name' => $entry['tmp_name'][$k],
                    'size' => $entry['size'][$k],
                    'type' => $entry['type'][$k],
                    'error' => $entry['error'][$k]
                );
            }
            return new self($files);
        }
        return $entry;
    }
    }
    ?>

This allows you to access a file uploaded using the following inputtype <input type="file" name="userfile[christiaan][][][is][gaaf][]" /> like

<?php
$files = new UploadedFiles($_FILES);
var_dump($files['userfile']['christiaan'][0][0]['is']['gaaf'][0]);
// or
foreach($files['userfile']['christiaan'][0][0]['is']['gaaf'] as $file) {
    var_dump($file);
}
?>

解决方案

Try this (your problem seems in fact to be the totally missing understanding of how this all works in php, instead of some specific problem/bug/...):

whatever.php:

<form enctype="multipart/form-data" action="<?=$_SERVER['PHP_SELF']?>">
First file: <input type="file" name="uploads[]" /><br>
Second File: <input type="file" name="uploads[]" /><br>
Multiple files at once (firefox, chrome, ... not IE < 10): <input type="file" name="uploads_multiple[]" multiple="multiple" /><br>
<input type="submit" value="Go" />
</form>
<?php
print_r($_FILES);

Try this with different inputs (filesizes, missing files, ...) to see what you get from that in php. I think you'll benefit from this way more than if posted some finished code.

Edit: Also, DON'T use copy for this! Most of the time it just won't work, sometimes it might give unexpected results, and sometimes you'll just be opening a can of worms. There is a reason the function move_uploaded_file exists - USE IT!

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