Uploading multiple files

Multiple files can be uploaded using different name for input.

It is also possible to upload multiple files simultaneously and have the information organized automatically in arrays for you. To do so, you need to use the same array submission syntax in the HTML form as you do with multiple selects and checkboxes:

Przykład #1 Uploading multiple files

<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>

When the above form is submitted, the arrays $_FILES['userfile'], $_FILES['userfile']['name'], and $_FILES['userfile']['size'] will be initialized (as well as in $HTTP_POST_FILES for PHP versions prior to 4.1.0). When register_globals is on, globals for uploaded files are also initialized. Each of these will be a numerically indexed array of the appropriate values for the submitted files.

For instance, assume that the filenames /home/test/review.html and /home/test/xwp.out are submitted. In this case, $_FILES['userfile']['name'][0] would contain the value review.html, and $_FILES['userfile']['name'][1] would contain the value xwp.out. Similarly, $_FILES['userfile']['size'][0] would contain review.html's file size, and so forth.

$_FILES['userfile']['name'][0], $_FILES['userfile']['tmp_name'][0], $_FILES['userfile']['size'][0], and $_FILES['userfile']['type'][0] are also set.

Ostrzeżenie

Since PHP 5.2.12, the max_file_uploads configuration setting acts as a limit on the number of files that can be uploaded in one request. You will need to ensure that your form does not try to upload more files in one request than this limit.

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User Contributed Notes 10 notes

up
82
phpuser at gmail dot com
9 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
12
wizzard351 at yahoo dot com
10 months 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
10
Corey Ballou
4 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
11
timspeelman at live dot nl
3 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
3
javad dot geek at gmail dot com
9 months ago
$countarray = count($_FILES['uploadfile']['name']);
                $newarray = array();
                for($i=0;$i<$countarray;$i++){
                    $newarray[$i]['name']=$_FILES['uploadfile']['name'][$i];
                    $newarray[$i]['type']=$_FILES['uploadfile']['type'][$i];
                    $newarray[$i]['tmp_name']=$_FILES['uploadfile']['tmp_name'][$i];
                    $newarray[$i]['error']=$_FILES['uploadfile']['error'][$i];
                    $newarray[$i]['size']=$_FILES['uploadfile']['size'][$i];
                }
up
3
jess at semlabs dot co dot uk
5 years ago
If you try and upload files with multi-dimensional names like this:

<input type="file" name="submission[screenshot]" />
<input type="file" name="other[dem][][img][]" />

You will get an unexpected format like this:

<?php
array(
   
'submission' => array
        (
           
'name' => array( 'screenshot' => 'monster_wallpaper.jpg' ),
           
'type' => array( 'screenshot' => 'image/jpeg' ),
           
'tmp_name' => array( 'screenshot' => '/tmp/php48lX2Y' ),
           
'error' => array( 'screenshot' => 0 ),
           
'size' => array( 'screenshot' => 223262 ),
        ),
....
?>

You can use the following function to re-format the array recursively in the usual format:

<?php
function format_files_array( $files, $name = null, &$new = false, $path = false ){
   
$names = array( 'name' => 'name', 'type' => 'type', 'tmp_name' => 'tmp_name', 'error' => 'error', 'size' => 'size' );
   
    foreach(
$files as $key => &$part )
    {
       
$key = ( string ) $key;
        if(
in_array( $key, $names ) )
           
$name = $key;
        if( !
in_array( $key, $names ) )
           
$path[] = $key;
        if(
is_array( $part ) )
           
$part = format_files_array( $part, $name, $new, $path );
        elseif( !
is_array( $part ) )
        {
           
$current =& $new;
            foreach(
$path as $p )
               
$current =& $current[$p];
           
$current[$name] = $part;
            unset(
$path );
           
$name = null;
        }
    }
   
    return
$new;
}
?>
up
1
contato at dgmike dot com dot br
3 years ago
I prefer something like this!

<?php
public function arrayImages ( &$file_post )
{
    if( empty(
$file_post ) ) {
        return
$file_post;
    }
    if(
'array'!==gettype($file_post['name']) ) {
        return
$file_post;
    }
   
$keys = array_keys($file_post['name']);
   
$file_array = array();
    foreach (
$keys as $key) {
       foreach (
$file_post as $res=>$item) {
          
$file_array[$key][$res] = $item[$key];
       }
   }
   return
$file_array;
}
?>
up
1
hotmail.com[at]notdefix
7 years ago
With multiple file uploads

post_max_size: the total amount of data posted by the client (all files, and all other form field)

upload_max_filesize: the maximum size of 1 single file. (just like <input type="hidden" name="MAX_FILE_SIZE" value="..."/>)

so, with the directives:
post_max_size 25M
upload_max_filesize 2M

you can send 12 files of up to 2 MB and use up to 1 MB for your additional form-values.

As long as you read only a single copy of 1 file into memory, the memory_limit directive can be held reasonable small as well.
up
-8
ohcnim at hotmail dot com
1 year ago
by simply naming differently each file input you'll get easily accesible arrays from $_FILES, in the form $_FILES['input_name']['file_attribute'].  For example:

$_FILES['input_name1']['name']...['input_name1']['size']
$_FILES['input_name2']['name']...['input_name2']['size']
$_FILES['input_nameX']['name']...['input_nameX']['size']
up
-12
christiaan at baartse dot nl
4 years ago
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 <christiaan@baartse.nl>
*/
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);
}
?>
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