MY_Upload.php

<?php  if ( ! defined('BASEPATH')) exit('No direct script access allowed');


 /**
 * MY_Upload
 * Exenstion File Uploading Class
 * 
 * 	Installation
	============
	Copy MY_Upload.php to your application/libraries directory. If you are using a prefix other than MY_ for your classes and/or alternative file paths, adjust accordingly.

	Usage Load the Upload class as usual, in your controller call the function do_multi_upload(). If you are uploading a single file, it'll default to the regular do_upload() method. In the form, set field names to array (e.g. name="userfile[]")

 * 
 * 
 * 
 * @author Nic Rosental
 * @version $Id$
 * @access public
 */
class MY_Upload extends CI_Upload {
	
	/**
	 * MY_Upload::do_multi_upload()
	 * 
	 * @param string $field				Fields to fetch files from
	 * @param bool $return_info			Return array with all the upload data
	 * @param string $new_file_name		Destination file name format. you can use `whatever_you_want{i}` where {i} represents the current iteration in the loop. this will allow you to specify myfile[5], myfile[10] etc' and
	 * 									to use these array keys for the final file.
	 * @param bool $lowercase_ext		Should we lowercase the file extension.
	 * @return
	 */
	public function do_multi_upload( $field = 'userfile', $return_info = TRUE, $new_file_name = '' ,$lowercase_ext = TRUE){

		// Is $_FILES[$field] set? If not, no reason to continue.
		if ( ! isset($_FILES[$field]))
		{
			$this->set_error('upload_no_file_selected');
			return FALSE;
		}
		
		// Is the upload path valid?
		if ( ! $this->validate_upload_path($field))
		{
			// errors will already be set by validate_upload_path() so just return FALSE
			return FALSE;
		}
		
		//Multiple file upload
		if( is_array( $_FILES[$field] ) )
		{

			$count = count($_FILES[$field]['name']); //Number of files to process

			error_log('count => ' . $count );

			foreach ( $_FILES[$field]['name'] as $i => $value )
			{
			
				// Was the file able to be uploaded? If not, determine the reason why.
				if ( ! is_uploaded_file($_FILES[$field]['tmp_name'][$i]))
				{
					$error = ( ! isset($_FILES[$field]['error'][$i])) ? 4 : $_FILES[$field]['error'][$i];
		
					switch($error)
					{
						case 1:	// UPLOAD_ERR_INI_SIZE
							$this->set_error('upload_file_exceeds_limit');
							break;
						case 2: // UPLOAD_ERR_FORM_SIZE
							$this->set_error('upload_file_exceeds_form_limit');
							break;
						case 3: // UPLOAD_ERR_PARTIAL
							$this->set_error('upload_file_partial');
							break;
						case 4: // UPLOAD_ERR_NO_FILE
							$this->set_error('upload_no_file_selected');
							break;
						case 6: // UPLOAD_ERR_NO_TMP_DIR
							$this->set_error('upload_no_temp_directory');
							break;
						case 7: // UPLOAD_ERR_CANT_WRITE
							$this->set_error('upload_unable_to_write_file');
							break;
						case 8: // UPLOAD_ERR_EXTENSION
							$this->set_error('upload_stopped_by_extension');
							break;
						default :   $this->set_error('upload_no_file_selected');
							break;
					}
		
					return FALSE;
				}
								
				// Set the uploaded data as class variables
				$this->file_temp = $_FILES[$field]['tmp_name'][$i];
				$this->file_size = $_FILES[$field]['size'][$i];
				$this->file_type = preg_replace("/^(.+?);.*$/", "\\1", $_FILES[$field]['type'][$i]);
				$this->file_type = strtolower(trim(stripslashes($this->file_type), '"'));
				$this->file_name = $this->_prep_filename($_FILES[$field]['name'][$i]);
				$this->file_ext	 = $this->get_extension($this->file_name);
				$this->client_name = $this->file_name;
				
				// Is the file type allowed to be uploaded?
				if ( ! $this->is_allowed_filetype())
				{
					$this->set_error('upload_invalid_filetype');
					return FALSE;
				}
				
				// Lowercase extension
				if ( $lowercase_ext == TRUE ) {
					$this->file_ext = strtolower($this->file_ext);
				}

				// Rename destination filename
				if ( !empty($new_file_name) ) {
					$this->file_name = str_replace('{i}',$i,$new_file_name) . $this->file_ext;
				}

				// if we're overriding, let's now make sure the new name and type is allowed
				if ($this->_file_name_override != '')
				{
					$this->file_name = $this->_prep_filename($this->_file_name_override);
		
					// If no extension was provided in the file_name config item, use the uploaded one
					if (strpos($this->_file_name_override, '.') === FALSE)
					{
						$this->file_name .= $this->file_ext;
					}
		
					// An extension was provided, lets have it!
					else
					{
						$this->file_ext	 = $this->get_extension($this->_file_name_override);
					}
		
					if ( ! $this->is_allowed_filetype(TRUE))
					{
						$this->set_error('upload_invalid_filetype');
						return FALSE;
					}
				}
	
				// Convert the file size to kilobytes
				if ($this->file_size > 0)
				{
					$this->file_size = round($this->file_size/1024, 2);
				}
		
				// Is the file size within the allowed maximum?
				if ( ! $this->is_allowed_filesize())
				{
					$this->set_error('upload_invalid_filesize');
					return FALSE;
				}
		
				// Are the image dimensions within the allowed size?
				// Note: This can fail if the server has an open_basdir restriction.
				if ( ! $this->is_allowed_dimensions())
				{
					$this->set_error('upload_invalid_dimensions');
					return FALSE;
				}
	
				// Sanitize the file name for security
				$this->file_name = $this->clean_file_name($this->file_name);

				// Truncate the file name if it's too long
				if ($this->max_filename > 0)
				{
					$this->file_name = $this->limit_filename_length($this->file_name, $this->max_filename);
				}
		
				// Remove white spaces in the name
				if ($this->remove_spaces == TRUE)
				{
					$this->file_name = preg_replace("/\s+/", "_", $this->file_name);
				}
		
				/*
				 * Validate the file name
				 * This function appends an number onto the end of
				 * the file if one with the same name already exists.
				 * If it returns false there was a problem.
				 */
				$this->orig_name = $this->file_name;
		
				if ($this->overwrite == FALSE)
				{
					$this->file_name = $this->set_filename($this->upload_path, $this->file_name);
		
					if ($this->file_name === FALSE)
					{
						return FALSE;
					}
				}
		
				/*
				 * Run the file through the XSS hacking filter
				 * This helps prevent malicious code from being
				 * embedded within a file.  Scripts can easily
				 * be disguised as images or other file types.
				 */
				if ($this->xss_clean)
				{
					if ($this->do_xss_clean() === FALSE)
					{
						$this->set_error('upload_unable_to_write_file');
						return FALSE;
					}
				}
		
				/*
				 * Move the file to the final destination
				 * To deal with different server configurations
				 * we'll attempt to use copy() first.  If that fails
				 * we'll use move_uploaded_file().  One of the two should
				 * reliably work in most environments
				 */
				if ( ! @copy($this->file_temp, $this->upload_path.$this->file_name))
				{
					if ( ! @move_uploaded_file($this->file_temp, $this->upload_path.$this->file_name))
					{
						$this->set_error('upload_destination_error');
						return FALSE;
					}
				}
		
				/*
				 * Set the finalized image dimensions
				 * This sets the image width/height (assuming the
				 * file was an image).  We use this information
				 * in the "data" function.
				 */
				$this->set_image_properties($this->upload_path.$this->file_name);
		
				
				if( $return_info === TRUE )
				{
					
					$return_value[] = $this->data();
				
				}
				else
				{
				
					$return_value = TRUE;
				
				}
				
				
			}
			
			return $return_value;
		
		}
		else //Single file upload, rely on native CI upload class
		{
		
			$upload = self::do_upload();
			
			return $upload;
		
		}

	
	}

}