Multiple file upload

Uploading multiple files with PHP requires checking for many possible errors. This script allows the setting of how many upload fields will be displayed in the HTML form and the maximum allowable filesize to upload. The php.ini file also contains an ini option named upload_max_filesize which has a default value of 2M, or two megabytes. This value is taken into consideration also when checking for errors.

The errors are stored in an array called messages and for each file upload a message is generated based on any errors or success of the upload. The form itself was validated with the w3c validator in accordance with the DOCTYPE.



<?php
    /*
     *
     * @ Multiple File upload script.
     *
     * @ Can do any number of file uploads
     * @ Just set the variables below and away you go
     *
     * @ Author: Kevin Waterson
     *
     * @copywrite 2008 PHPRO.ORG
     *
     */

    error_reporting(E_ALL);
 
    /*** the upload directory ***/
    $upload_dir= './uploads';

    /*** numver of files to upload ***/
    $num_uploads = 5;

    /*** maximum filesize allowed in bytes ***/
    $max_file_size  = 51200;
 
    /*** the maximum filesize from php.ini ***/
    $ini_max = str_replace('M', '', ini_get('upload_max_filesize'));
    $upload_max = $ini_max * 1024;

    /*** a message for users ***/
    $msg = 'Please select files for uploading';

    /*** an array to hold messages ***/
    $messages = array();

    /*** check if a file has been submitted ***/
    if(isset($_FILES['userfile']['tmp_name']))
    {
        /** loop through the array of files ***/
        for($i=0; $i < count($_FILES['userfile']['tmp_name']);$i++)
        {
            // check if there is a file in the array
            if(!is_uploaded_file($_FILES['userfile']['tmp_name'][$i]))
            {
                $messages[] = 'No file uploaded';
            }
            /*** check if the file is less then the max php.ini size ***/
            elseif($_FILES['userfile']['size'][$i] > $upload_max)
            {
                $messages[] = "File size exceeds $upload_max php.ini limit";
            }
            // check the file is less than the maximum file size
            elseif($_FILES['userfile']['size'][$i] > $max_file_size)
            {
                $messages[] = "File size exceeds $max_file_size limit";
            }
            else
            {
                // copy the file to the specified dir 
                if(@copy($_FILES['userfile']['tmp_name'][$i],$upload_dir.'/'.$_FILES['userfile']['name'][$i]))
                {
                    /*** give praise and thanks to the php gods ***/
                    $messages[] = $_FILES['userfile']['name'][$i].' uploaded';
                }
                else
                {
                    /*** an error message ***/
                    $messages[] = 'Uploading '.$_FILES['userfile']['name'][$i].' Failed';
                }
            }
        }
    }
?>
 <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN"
 "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
 <html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en" lang="en">
 <head>
 <title>Multiple File Upload</title>
 </head>

 <body>
 
 <h3><?php echo $msg; ?></h3>
 <p>
 <?php
    if(sizeof($messages) != 0)
    {
        foreach($messages as $err)
        {
            echo $err.'<br />';
        }
    }
 ?>
 </p>
 <form enctype="multipart/form-data" action="<?php echo htmlentities($_SERVER['PHP_SELF']);?>" method="post">
 <input type="hidden" name="MAX_FILE_SIZE" value="<?php echo $max_file_size; ?>" />
 <?php
    $num = 0;
    while($num < $num_uploads)
    {
        echo '<div><input name="userfile[]" type="file" /></div>';
        $num++;
    }
 ?>

 <input type="submit" value="Upload" />
 </form>

 </body>
 </html>