Caricamento di più file

È possibile inviare più file contemporanemante utilizzando differenti attributi name i per input.

E' possibile caricare più file contemporaneamente e avere le informazioni organizzate automaticamente in array. Per questo è necessario utilizzare la medesima sintassi di invio di array da form HTML che è utilizzata con select e checkbox multipli:

Example #1 Caricamento di più file

<form action="file-upload.php" method="post" enctype="multipart/form-data">
  Send these files:<br />
  <input name="userfile[]" type="file" /><br />
  <input name="userfile[]" type="file" /><br />
  <input type="submit" value="Send files" />
</form>

Quando la form è inviata, gli array $_FILES['userfile'], $_FILES['userfile']['name'], e $_FILES['userfile']['size'] saranno inizializzati.

Per esempio, si supponga che i nomi di file /home/test/review.html e /home/test/xwp.out siano inviati. In questo caso, $_FILES['userfile']['name'][0] conterrebbe il valore review.html, e $_FILES['userfile']['name'][1] conterrebbe il valore xwp.out. Analogamente, $_FILES['userfile']['size'][0] conterrebbe la dimensione di review.html, e così via.

$_FILES['userfile']['name'][0], $_FILES['userfile']['tmp_name'][0], $_FILES['userfile']['size'][0], e $_FILES['userfile']['type'][0] sono ugualmente impostati.

Avviso

Da PHP 5.2.12, il parametro di configurazione max_file_uploads limita il numero di file che possono essere caricati durante una richiesta. Occorre assicurarsi che il form non cerchi di caricare più file di questo limite.

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User Contributed Notes 8 notes

up
353
phpuser at gmail dot com
19 years ago
When uploading multiple files, the $_FILES variable is created in the form:

Array
(
[name] => Array
(
[0] => foo.txt
[1] => bar.txt
)

[type] => Array
(
[0] => text/plain
[1] => text/plain
)

[tmp_name] => Array
(
[0] => /tmp/phpYzdqkD
[1] => /tmp/phpeEwEWG
)

[error] => Array
(
[0] => 0
[1] => 0
)

[size] => Array
(
[0] => 123
[1] => 456
)
)

I found it made for a little cleaner code if I had the uploaded files array in the form

Array
(
[0] => Array
(
[name] => foo.txt
[type] => text/plain
[tmp_name] => /tmp/phpYzdqkD
[error] => 0
[size] => 123
)

[1] => Array
(
[name] => bar.txt
[type] => text/plain
[tmp_name] => /tmp/phpeEwEWG
[error] => 0
[size] => 456
)
)

I wrote a quick function that would convert the $_FILES array to the cleaner (IMHO) array.

<?php

function reArrayFiles(&$file_post) {

$file_ary = array();
$file_count = count($file_post['name']);
$file_keys = array_keys($file_post);

for (
$i=0; $i<$file_count; $i++) {
foreach (
$file_keys as $key) {
$file_ary[$i][$key] = $file_post[$key][$i];
}
}

return
$file_ary;
}

?>

Now I can do the following:

<?php

if ($_FILES['upload']) {
$file_ary = reArrayFiles($_FILES['ufile']);

foreach (
$file_ary as $file) {
print
'File Name: ' . $file['name'];
print
'File Type: ' . $file['type'];
print
'File Size: ' . $file['size'];
}
}

?>
up
18
i.g.e.o@ya (dot) ru
4 years ago
A bit update to 14 year ago note from "phpuser at gmail dot com".
That update converts to a really more friendly array form incoming _POST info for uploaded files.
And that variants works identical for non-multiple uploads and multiple uploads:
<?php
//Функция переформатирует массив поданных POST'ом файлов
function reArrayFiles(&$file_post){
$isMulti = is_array($file_post['name']);
$file_count = $isMulti?count($file_post['name']):1;
$file_keys = array_keys($file_post);

$file_ary = []; //Итоговый массив
for($i=0; $i<$file_count; $i++)
foreach(
$file_keys as $key)
if(
$isMulti)
$file_ary[$i][$key] = $file_post[$key][$i];
else
$file_ary[$i][$key] = $file_post[$key];

return
$file_ary;
}
?>
up
50
wizzard351 at yahoo dot com
10 years ago
This is also needed for <input type=file multiple> elements.

So, if you have an input element like this:
<input type="file" multiple="multiple" name="foobar" />
This should be written as
<input type="file" multiple="multiple" name="foobar[]" />
else you'll only be able to get one of the files.
up
1
steam dot bakyt2 at gmail dot com
11 months ago
Just combine temporary path with the filename which will result an array like:

array(2) {
["/tmp/phpAYCvcc"]=> string(10) "file1.jpg"
["/tmp/phpCDg79o"]=> string(10) "file2.jpg"
}

The code:

$files = array_combine(
$_FILES['receipt']['tmp_name'],
$_FILES['receipt']['name']
);

foreach ($files as $key => $value) {
// save your files locally
}
up
12
Corey Ballou
14 years ago
Here is a function to fix the indices of a multi-dimensional for easier parsing when dealing with file uploads. It takes a single $_FILES field array as a parameter and separates each individual uploaded file by numeric key. This allows for iterating like:

<?php
fixFilesArray
($_FILES['array_of_files']);
foreach (
$_FILES['array_of_files'] as $position => $file) {
// should output array with indices name, type, tmp_name, error, size
var_dump($file);
}
?>

Here's the code:

<?php
/**
* Fixes the odd indexing of multiple file uploads from the format:
*
* $_FILES['field']['key']['index']
*
* To the more standard and appropriate:
*
* $_FILES['field']['index']['key']
*
* @param array $files
* @author Corey Ballou
* @link http://www.jqueryin.com
*/
function fixFilesArray(&$files)
{
$names = array( 'name' => 1, 'type' => 1, 'tmp_name' => 1, 'error' => 1, 'size' => 1);

foreach (
$files as $key => $part) {
// only deal with valid keys and multiple files
$key = (string) $key;
if (isset(
$names[$key]) && is_array($part)) {
foreach (
$part as $position => $value) {
$files[$position][$key] = $value;
}
// remove old key reference
unset($files[$key]);
}
}
}
?>
up
15
timspeelman at live dot nl
12 years ago
The cleanest way to rearrange the $_FILES

<?php
function rearrange( $arr ){
foreach(
$arr as $key => $all ){
foreach(
$all as $i => $val ){
$new[$i][$key] = $val;
}
}
return
$new;
}
?>
up
6
lookphp at gmail dot com
8 years ago
This is a very simple example:

Part I : HTML

<!doctype html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>Document</title>
</head>
<body>
<form action="upload.php" method="post" multipart="" enctype="multipart/form-data">
<input type="file" name="img[]" multiple>
<input type="submit">
</form>
</body>
</html>

Part II : PHP

<?php
echo '<pre>';
$img = $_FILES['img'];

if(!empty(
$img))
{
$img_desc = reArrayFiles($img);
print_r($img_desc);

foreach(
$img_desc as $val)
{
$newname = date('YmdHis',time()).mt_rand().'.jpg';
move_uploaded_file($val['tmp_name'],'./uploads/'.$newname);
}
}

function
reArrayFiles($file)
{
$file_ary = array();
$file_count = count($file['name']);
$file_key = array_keys($file);

for(
$i=0;$i<$file_count;$i++)
{
foreach(
$file_key as $val)
{
$file_ary[$i][$val] = $file[$val][$i];
}
}
return
$file_ary;
}
up
0
sabryabdelmohsen at gmail dot com
4 years ago
function reArrayImages($file_post) {
$file_ary = [];
$file_keys = array_keys($file_post);
foreach ($file_post as $key => $value) {
foreach ($value as $key2 => $value2) {
$file_ary[$key2][$key] = $value2;
}
}
return $file_ary;
}
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