我正在尝试使用CodeIgniter上传Excel文件。我想要做的就是只读取文件，而不是在配置中需要的上传路径中移动/上传文件。
是的，我可以使用本机PHP的$_FILES超全局变量。但是，我喜欢使用该库，因为它为我的应用程序提供了额外的安全性。
那么..如何使用CI的文件上传类上传文件而不上传到我的服务器？
$config['upload_path'] = './public/uploads/';
$config['allowed_types'] = 'xlsx|xls';
$this->load->library('upload', $config);
if(!$this->upload->do_upload('userfile'))
{
$this->output->set_output(array('result' => FALSE, 'message' => $this->upload->display_errors()))->_display();
exit(1);
}
else
{
$data = $this->upload->data();
// Let the model do his work!
$this->load->model('Userlist_Model');
$result = $this->Userlist_Model->extract_list($data);
$this->output->set_output($result)->_display();
}
答案 0 :(得分：0)
这是我的解决方案：只需在libraries文件夹中创建MY_Upload即可扩展Upload.php（CI_Upload）。复制do_upload()方法，然后删除上传开始的部分：
<强> MY_Upload.php
class MY_Upload extends CI_Upload
{
public function validate_file($field = 'userfile')
{
// Is $_FILES[$field] set? If not, no reason to continue.
if (isset($_FILES[$field]))
{
$_file = $_FILES[$field];
}
// Does the field name contain array notation?
elseif (($c = preg_match_all('/(?:^[^\[]+)|\[[^]]*\]/', $field, $matches)) > 1)
{
$_file = $_FILES;
for ($i = 0; $i < $c; $i++)
{
// We can't track numeric iterations, only full field names are accepted
if (($field = trim($matches[0][$i], '[]')) === '' OR ! isset($_file[$field]))
{
$_file = NULL;
break;
}
$_file = $_file[$field];
}
}
if ( ! isset($_file))
{
$this->set_error('upload_no_file_selected', 'debug');
return FALSE;
}
// Is the upload path valid?
if ( ! $this->validate_upload_path())
{
// errors will already be set by validate_upload_path() so just return FALSE
return FALSE;
}
// Was the file able to be uploaded? If not, determine the reason why.
if ( ! is_uploaded_file($_file['tmp_name']))
{
$error = isset($_file['error']) ? $_file['error'] : 4;
switch ($error)
{
case UPLOAD_ERR_INI_SIZE:
$this->set_error('upload_file_exceeds_limit', 'info');
break;
case UPLOAD_ERR_FORM_SIZE:
$this->set_error('upload_file_exceeds_form_limit', 'info');
break;
case UPLOAD_ERR_PARTIAL:
$this->set_error('upload_file_partial', 'debug');
break;
case UPLOAD_ERR_NO_FILE:
$this->set_error('upload_no_file_selected', 'debug');
break;
case UPLOAD_ERR_NO_TMP_DIR:
$this->set_error('upload_no_temp_directory', 'error');
break;
case UPLOAD_ERR_CANT_WRITE:
$this->set_error('upload_unable_to_write_file', 'error');
break;
case UPLOAD_ERR_EXTENSION:
$this->set_error('upload_stopped_by_extension', 'debug');
break;
default:
$this->set_error('upload_no_file_selected', 'debug');
break;
}
return FALSE;
}
// Set the uploaded data as class variables
$this->file_temp = $_file['tmp_name'];
$this->file_size = $_file['size'];
// Skip MIME type detection?
if ($this->detect_mime !== FALSE)
{
$this->_file_mime_type($_file);
}
$this->file_type = preg_replace('/^(.+?);.*$/', '\\1', $this->file_type);
$this->file_type = strtolower(trim(stripslashes($this->file_type), '"'));
$this->file_name = $this->_prep_filename($_file['name']);
$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())
{
$this->set_error('upload_invalid_filetype', 'debug');
return FALSE;
}
// if we're overriding, let's now make sure the new name and type is allowed
if ($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;
}
else
{
// An extension was provided, let's have it!
$this->file_ext = $this->get_extension($this->_file_name_override);
}
if ( ! $this->is_allowed_filetype(TRUE))
{
$this->set_error('upload_invalid_filetype', 'debug');
return FALSE;
}
}
// Convert the file size to kilobytes
if ($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', 'info');
return FALSE;
}
// Are the image dimensions within the allowed size?
// Note: This can fail if the server has an open_basedir restriction.
if ( ! $this->is_allowed_dimensions())
{
$this->set_error('upload_invalid_dimensions', 'info');
return FALSE;
}
// Sanitize the file name for security
$this->file_name = $this->_CI->security->sanitize_filename($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+/', '_', $this->file_name);
}
if ($this->file_ext_tolower && ($ext_length = strlen($this->file_ext)))
{
// file_ext was previously lower-cased by a get_extension() call
$this->file_name = substr($this->file_name, 0, -$ext_length).$this->file_ext;
}
/*
* 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 = $this->file_name;
if (FALSE === ($this->file_name = $this->set_filename($this->upload_path, $this->file_name)))
{
return FALSE;
}
/*
* Run the file through the XSS hacking filter
* This helps prevent malicious code from being
* embedded within a file. Scripts can easily
* be disguised as images or other file types.
*/
if ($this->xss_clean && $this->do_xss_clean() === FALSE)
{
$this->set_error('upload_unable_to_write_file', '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);
// Return true if the file passed the validation
return TRUE;
}
}