Use the CodeIgniter class library to upload images. CodeIgniter's file Upload class allows files to be uploaded. You can specify the file type to be uploaded and the file size to be specified. A common process of uploading files: CodeIgniter files used to upload files can be uploaded. You can specify the file type to be uploaded and the file size to be specified.
The general process of uploading files:
- A form used to upload a file. you can select a file and upload it.
- When this form is submitted, the file is uploaded to the specified directory.
- At the same time, the file will be verified to meet your set requirements.
- Once the file is uploaded successfully, a confirmation window is returned.
The following is a form:
Next is the upload class:
public function img_upload(){$this->load->helper('url');$config['upload_path'] = './images/'.date('Ym', time()).'/';$config['allowed_types'] = 'gif|jpg|png';$config['file_name'] = date('Y_m_d', time()).'_'.sprintf('%02d', rand(0,99));$config['max_size'] = '500';$config['max_width'] = '1024';$config['max_height'] = '768';$this->load->library('upload', $config);if ( !$this->upload->do_upload()) { $error = array('error' => $this->upload->display_errors()); } else { $data = array('upload_data' => $this->upload->data()); }}
Preference parameters
Preference settings |
Default value |
Option |
Description |
Upload_path |
None |
None |
File upload path. The path must be writable. the relative path and absolute path can both be used. |
Allowed_types |
None |
None |
The MIME type of the file to be uploaded. Generally, the file extension can be used as the MIME type. multiple types can be separated by vertical bars (| ). |
File_name |
None |
File name to be used |
If this parameter is set, CodeIgniter will rename the uploaded file based on the file name set here. The file name extension must also be of the allowed file type. |
Overwrite |
FALSE |
TRUE/FALSE (boolean) |
Overwrite or not. If this parameter is set to TRUE, the original file will be overwritten if the file is uploaded with a duplicate name. If this parameter is set to FALSE, CI will add a number after the file name of the new file. If set to true, if a file with the same name as the one you are uploading exists, it will be overwritten. if set to false, a number will be appended to the filename if another with the same name exists. |
Max_size |
0 |
None |
Maximum size of the file to be uploaded (in K ). If this parameter is set to 0, no restriction is imposed. Note: PHP also has this restriction, which can be specified in the php. ini file. The default value is 2 MB. |
Max_width |
0 |
None |
The maximum width (in pixels) of the uploaded file ). 0 is unlimited. |
Max_height |
0 |
None |
The maximum height (in pixels) of the uploaded file ). 0 is unlimited. |
Max_filename |
0 |
None |
The maximum length of a file name. 0 is unlimited. |
Encrypt_name |
FALSE |
TRUE/FALSE (boolean) |
Whether to rename the file. If this parameter is set to TRUE, the uploaded file is renamed as a random encrypted string. It is useful when you want the file uploader not to distinguish the file name uploaded by himself. This option takes effect only when overwrite is FALSE. |
Remove_spaces |
TRUE |
TRUE/FALSE (boolean) |
If the parameter is TRUE, the space in the file name is replaced with an underscore. Recommended. |
Several functions used
- $ This-> upload-> do_upload (): configure parameters according to your preference to perform the operation. Note: By default, the uploaded file is namedUserfileAnd the form must be of the "multipart" type.
- $ This-> upload-> display_errors (): ifDo_upload ()An error is returned. This function does not automatically output but returns data, so you can arrange it as required.
- $ This-> upload-> data (): this is an auxiliary function that returns an array of all relevant information about the uploaded file.
The file Upload class for the http://www.bkjia.com/PHPjc/752371.htmlwww.bkjia.comtruehttp://www.bkjia.com/PHPjc/752371.htmlTechArticleCodeIgniter allows the file to be uploaded. You can specify the file type to be uploaded and the file size to be specified. The general process of uploading files: a file used for uploading...