我扩展了 CI_Upload 类并为图像添加了 multi_upload 函数。这在本地工作正常，但在服务器上它抛出：
Fatal error: Call to undefined method CI_Upload::do_multi_upload()
这没有任何意义，因为我尝试了几种不同的解决方案，但我发现使用谷歌没有运气。
这是我的“应用程序/库/MY_upload.php”类：
class MY_Upload extends CI_Upload {
var $return_value;
function __construct($config = array())
{
parent::__construct($config);
}
function do_multi_upload( $field = 'userfile', $return_info = TRUE, $filenames = NULL ){
// Is $_FILES[$field] set? If not, no reason to continue.
if ( ! isset($_FILES[$field]))
{
$this->ci->set_error('upload_no_file_selected');
return FALSE;
}
//If not every file filled was used, clear the empties
foreach( $_FILES[$field]['name'] as $k => $n )
{
if( empty( $n ) )
{
foreach( $_FILES[$field] as $kk => $f )
{
unset( $_FILES[$field][$kk][$k] );
}
}
}
// Is the upload path valid?
if ( ! $this->ci->validate_upload_path($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
foreach( $_FILES[$field]['name'] as $k => $file )
{
// Was the file able to be uploaded? If not, determine the reason why.
if ( ! is_uploaded_file($_FILES[$field]['tmp_name'][$k] ) )
{
$error = ( ! isset($_FILES[$field]['error'][$k])) ? 4 : $_FILES[$field]['error'][$k];
switch($error)
{
case 1: // UPLOAD_ERR_INI_SIZE
$this->ci->set_error('upload_file_exceeds_limit');
break;
case 2: // UPLOAD_ERR_FORM_SIZE
$this->ci->set_error('upload_file_exceeds_form_limit');
break;
case 3: // UPLOAD_ERR_PARTIAL
$this->ci->set_error('upload_file_partial');
break;
case 4: // UPLOAD_ERR_NO_FILE
$this->ci->set_error('upload_no_file_selected');
break;
case 6: // UPLOAD_ERR_NO_TMP_DIR
$this->ci->set_error('upload_no_temp_directory');
break;
case 7: // UPLOAD_ERR_CANT_WRITE
$this->ci->set_error('upload_unable_to_write_file');
break;
case 8: // UPLOAD_ERR_EXTENSION
$this->ci->set_error('upload_stopped_by_extension');
break;
default : $this->ci->set_error('upload_no_file_selected');
break;
}
return FALSE;
}
// Set the uploaded data as class variables
$this->ci->file_temp = $_FILES[$field]['tmp_name'][$k];
$this->ci->file_size = $_FILES[$field]['size'][$k];
$this->ci->file_type = preg_replace("/^(.+?);.*$/", "\\1", $_FILES[$field]['type'][$k]);
$this->ci->file_type = strtolower(trim(stripslashes($this->ci->file_type), '"'));
if(empty($filenames))
{
$this->ci->file_name = $this->ci->_prep_filename($_FILES[$field]['name'][$k]);
}
else
{
$this->ci->file_name = $this->ci->_prep_filename($filenames[$k]);
}
$this->ci->file_ext = $this->ci->get_extension($this->ci->file_name);
$this->ci->client_name = $this->ci->file_name;
// Is the file type allowed to be uploaded?
if ( ! $this->ci->is_allowed_filetype())
{
$this->ci->set_error('upload_invalid_filetype');
return FALSE;
}
// if we're overriding, let's now make sure the new name and type is allowed
if ($this->ci->_file_name_override != '')
{
$this->ci->file_name = $this->ci->_prep_filename($this->ci->_file_name_override);
// If no extension was provided in the file_name config item, use the uploaded one
if (strpos($this->ci->_file_name_override, '.') === FALSE)
{
$this->ci->file_name .= $this->ci->file_ext;
}
// An extension was provided, lets have it!
else
{
$this->ci->file_ext = $this->ci->get_extension($this->ci->_file_name_override);
}
if ( ! $this->ci->is_allowed_filetype(TRUE))
{
$this->ci->set_error('upload_invalid_filetype');
return FALSE;
}
}
// Convert the file size to kilobytes
if ($this->ci->file_size > 0)
{
$this->ci->file_size = round($this->ci->file_size/1024, 2);
}
// Is the file size within the allowed maximum?
if ( ! $this->ci->is_allowed_filesize())
{
$this->ci->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->ci->is_allowed_dimensions())
{
$this->ci->set_error('upload_invalid_dimensions');
return FALSE;
}
// Sanitize the file name for security
$this->ci->file_name = $this->ci->clean_file_name($this->ci->file_name);
// Truncate the file name if it's too long
if ($this->ci->max_filename > 0)
{
$this->ci->file_name = $this->ci->limit_filename_length($this->ci->file_name, $this->ci->max_filename);
}
// Remove white spaces in the name
if ($this->ci->remove_spaces == TRUE)
{
$this->ci->file_name = preg_replace("/\s+/", "_", $this->ci->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->ci->orig_name = $this->ci->file_name;
if ($this->ci->overwrite == FALSE)
{
$this->ci->file_name = $this->ci->set_filename($this->ci->upload_path, $this->ci->file_name);
if ($this->ci->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 ($this->ci->xss_clean)
{
if ($this->ci->do_xss_clean() === FALSE)
{
$this->ci->set_error('upload_unable_to_write_file');
return FALSE;
}
}
/*
* Move the file to the final destination
* To deal with different server configurations
* we'll attempt to use copy() first. If that fails
* we'll use move_uploaded_file(). One of the two should
* reliably work in most environments
*/
if ( ! @copy($this->ci->file_temp, $this->ci->upload_path.$this->ci->file_name))
{
if ( ! @move_uploaded_file($this->ci->file_temp, $this->ci->upload_path.$this->ci->file_name))
{
$this->ci->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.
*/
$this->ci->set_image_properties($this->ci->upload_path.$this->ci->file_name);
if( $return_info === TRUE )
{
$return_value[$k] = $this->ci->data();
}
else
{
$return_value = TRUE;
}
}
return $return_value;
}
else //Single file upload, rely on native CI upload class
{
$upload = self::do_upload();
return $upload;
}
}
}
?>
以及调用该函数的控制器：
$config = array(
'allowed_types' => 'jpg|jpeg|gif|png',
'upload_path' => $this->image_path,
'max_size' => 1500000,
'remove_spaces' => TRUE,
);
$this->load->library('upload');
$this->upload->initialize($config);
if($files = $this->upload->do_multi_upload('userfile', TRUE)){
}
//Fatal error: Call to undefined method CI_Upload::do_multi_upload() in controllers/admin.php on line 160