Upload Form

From 02a0518e1c56ba3506f370362ac5ebdb8a138312 Mon Sep 17 00:00:00 2001 From: Andrey Andreev Date: Sat, 13 Jan 2018 13:57:11 +0200 Subject: [ci skip] 3.1.7 release --- user_guide_src/source/libraries/file_uploading.rst | 355 --------------------- 1 file changed, 355 deletions(-) delete mode 100644 user_guide_src/source/libraries/file_uploading.rst (limited to 'user_guide_src/source/libraries/file_uploading.rst') diff --git a/user_guide_src/source/libraries/file_uploading.rst b/user_guide_src/source/libraries/file_uploading.rst deleted file mode 100644 index 6d2106be8..000000000 --- a/user_guide_src/source/libraries/file_uploading.rst +++ /dev/null @@ -1,355 +0,0 @@ -#################### -File Uploading Class -#################### - -CodeIgniter's File Uploading Class permits files to be uploaded. You can -set various preferences, restricting the type and size of the files. - -.. contents:: - :local: - -.. raw:: html - -

- -*********** -The Process -*********** - -Uploading a file involves the following general process: - -- An upload form is displayed, allowing a user to select a file and - upload it. -- When the form is submitted, the file is uploaded to the destination - you specify. -- Along the way, the file is validated to make sure it is allowed to be - uploaded based on the preferences you set. -- Once uploaded, the user will be shown a success message. - -To demonstrate this process here is brief tutorial. Afterward you'll -find reference information. - -Creating the Upload Form -======================== - -Using a text editor, create a form called upload_form.php. In it, place -this code and save it to your **application/views/** directory:: - - - - Upload Form - - - - - - - - - -

- - - - - - - - -You'll notice we are using a form helper to create the opening form tag. -File uploads require a multipart form, so the helper creates the proper -syntax for you. You'll also notice we have an $error variable. This is -so we can show error messages in the event the user does something -wrong. - -The Success Page -================ - -Using a text editor, create a form called upload_success.php. In it, -place this code and save it to your **application/views/** directory:: - - - - Upload Form - - - -

Your file was successfully uploaded!

- -

- - - - -The Controller -============== - -Using a text editor, create a controller called Upload.php. In it, place -this code and save it to your **application/controllers/** directory:: - - load->helper(array('form', 'url')); - } - - public function index() - { - $this->load->view('upload_form', array('error' => ' ' )); - } - - public function do_upload() - { - $config['upload_path'] = './uploads/'; - $config['allowed_types'] = 'gif|jpg|png'; - $config['max_size'] = 100; - $config['max_width'] = 1024; - $config['max_height'] = 768; - - $this->load->library('upload', $config); - - if ( ! $this->upload->do_upload('userfile')) - { - $error = array('error' => $this->upload->display_errors()); - - $this->load->view('upload_form', $error); - } - else - { - $data = array('upload_data' => $this->upload->data()); - - $this->load->view('upload_success', $data); - } - } - } - ?> - -The Upload Directory -==================== - -You'll need a destination directory for your uploaded images. Create a -directory at the root of your CodeIgniter installation called uploads -and set its file permissions to 777. - -Try it! -======= - -To try your form, visit your site using a URL similar to this one:: - - example.com/index.php/upload/ - -You should see an upload form. Try uploading an image file (either a -jpg, gif, or png). If the path in your controller is correct it should -work. - -*************** -Reference Guide -*************** - -Initializing the Upload Class -============================= - -Like most other classes in CodeIgniter, the Upload class is initialized -in your controller using the ``$this->load->library()`` method:: - - $this->load->library('upload'); - -Once the Upload class is loaded, the object will be available using: -$this->upload - -Setting Preferences -=================== - -Similar to other libraries, you'll control what is allowed to be upload -based on your preferences. In the controller you built above you set the -following preferences:: - - $config['upload_path'] = './uploads/'; - $config['allowed_types'] = 'gif|jpg|png'; - $config['max_size'] = '100'; - $config['max_width'] = '1024'; - $config['max_height'] = '768'; - - $this->load->library('upload', $config); - - // Alternately you can set preferences by calling the ``initialize()`` method. Useful if you auto-load the class: - $this->upload->initialize($config); - -The above preferences should be fairly self-explanatory. Below is a -table describing all available preferences. - -Preferences -=========== - -The following preferences are available. The default value indicates -what will be used if you do not specify that preference. - -============================ ================= ======================= ====================================================================== -Preference Default Value Options Description -============================ ================= ======================= ====================================================================== -**upload_path** None None The path to the directory where the upload should be placed. The - directory must be writable and the path can be absolute or relative. -**allowed_types** None None The mime types corresponding to the types of files you allow to be - uploaded. Usually the file extension can be used as the mime type. - Can be either an array or a pipe-separated string. -**file_name** None Desired file name If set CodeIgniter will rename the uploaded file to this name. The - extension provided in the file name must also be an allowed file type. - If no extension is provided in the original file_name will be used. -**file_ext_tolower** FALSE TRUE/FALSE (boolean) If set to TRUE, the file extension will be forced to lower case -**overwrite** FALSE TRUE/FALSE (boolean) 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 The maximum size (in kilobytes) that the file can be. Set to zero for no - limit. Note: Most PHP installations have their own limit, as specified - in the php.ini file. Usually 2 MB (or 2048 KB) by default. -**max_width** 0 None The maximum width (in pixels) that the image can be. Set to zero for no - limit. -**max_height** 0 None The maximum height (in pixels) that the image can be. Set to zero for no - limit. -**min_width** 0 None The minimum width (in pixels) that the image can be. Set to zero for no - limit. -**min_height** 0 None The minimum height (in pixels) that the image can be. Set to zero for no - limit. -**max_filename** 0 None The maximum length that a file name can be. Set to zero for no limit. -**max_filename_increment** 100 None When overwrite is set to FALSE, use this to set the maximum filename - increment for CodeIgniter to append to the filename. -**encrypt_name** FALSE TRUE/FALSE (boolean) If set to TRUE the file name will be converted to a random encrypted - string. This can be useful if you would like the file saved with a name - that can not be discerned by the person uploading it. -**remove_spaces** TRUE TRUE/FALSE (boolean) If set to TRUE, any spaces in the file name will be converted to - underscores. This is recommended. -**detect_mime** TRUE TRUE/FALSE (boolean) If set to TRUE, a server side detection of the file type will be - performed to avoid code injection attacks. DO NOT disable this option - unless you have no other option as that would cause a security risk. -**mod_mime_fix** TRUE TRUE/FALSE (boolean) If set to TRUE, multiple filename extensions will be suffixed with an - underscore in order to avoid triggering `Apache mod_mime - `_. - DO NOT turn off this option if your upload directory is public, as this - is a security risk. -============================ ================= ======================= ====================================================================== - -Setting preferences in a config file -==================================== - -If you prefer not to set preferences using the above method, you can -instead put them into a config file. Simply create a new file called the -upload.php, add the $config array in that file. Then save the file in: -**config/upload.php** and it will be used automatically. You will NOT -need to use the ``$this->upload->initialize()`` method if you save your -preferences in a config file. - -*************** -Class Reference -*************** - -.. php:class:: CI_Upload - - .. php:method:: initialize([array $config = array()[, $reset = TRUE]]) - - :param array $config: Preferences - :param bool $reset: Whether to reset preferences (that are not provided in $config) to their defaults - :returns: CI_Upload instance (method chaining) - :rtype: CI_Upload - - .. php:method:: do_upload([$field = 'userfile']) - - :param string $field: Name of the form field - :returns: TRUE on success, FALSE on failure - :rtype: bool - - Performs the upload based on the preferences you've set. - - .. note:: By default the upload routine expects the file to come from - a form field called userfile, and the form must be of type - "multipart". - - :: - -

- - If you would like to set your own field name simply pass its value to - the ``do_upload()`` method:: - - $field_name = "some_field_name"; - $this->upload->do_upload($field_name); - - .. php:method:: display_errors([$open = '

'[, $close = '

']]) - - :param string $open: Opening markup - :param string $close: Closing markup - :returns: Formatted error message(s) - :rtype: string - - Retrieves any error messages if the ``do_upload()`` method returned - false. The method does not echo automatically, it returns the data so - you can assign it however you need. - - **Formatting Errors** - - By default the above method wraps any errors within

tags. You can - set your own delimiters like this:: - - $this->upload->display_errors('

', '

'); - - - .. php:method:: data([$index = NULL]) - - :param string $data: Element to return instead of the full array - :returns: Information about the uploaded file - :rtype: mixed - - This is a helper method that returns an array containing all of the - data related to the file you uploaded. Here is the array prototype:: - - Array - ( - [file_name] => mypic.jpg - [file_type] => image/jpeg - [file_path] => /path/to/your/upload/ - [full_path] => /path/to/your/upload/jpg.jpg - [raw_name] => mypic - [orig_name] => mypic.jpg - [client_name] => mypic.jpg - [file_ext] => .jpg - [file_size] => 22.2 - [is_image] => 1 - [image_width] => 800 - [image_height] => 600 - [image_type] => jpeg - [image_size_str] => width="800" height="200" - ) - - To return one element from the array:: - - $this->upload->data('file_name'); // Returns: mypic.jpg - - Here's a table explaining the above-displayed array items: - - ================ ==================================================================================================== - Item Description - ================ ==================================================================================================== - file_name Name of the file that was uploaded, including the filename extension - file_type File MIME type identifier - file_path Absolute server path to the file - full_path Absolute server path, including the file name - raw_name File name, without the extension - orig_name Original file name. This is only useful if you use the encrypted name option. - client_name File name as supplied by the client user agent, prior to any file name preparation or incrementing - file_ext Filename extension, period included - file_size File size in kilobytes - is_image Whether the file is an image or not. 1 = image. 0 = not. - image_width Image width - image_height Image height - image_type Image type (usually the file name extension without the period) - image_size_str A string containing the width and height (useful to put into an image tag) - ================ ==================================================================================================== -- cgit v1.2.3-24-g4f1b