This document discusses Codeigniter's file upload, image manipulation, and language features. It describes how to use the File Upload class to upload files with validation and preferences. The Image class allows resizing, cropping, rotating, and watermarking images. Language files can be created and loaded to retrieve translated text for multi-language applications. Examples are provided for uploading files, resizing images, and loading language files.

1. Codeigniter Framework
4. File Upload & Image manipulation & Language
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2. Agenda
• File upload.
• Image manipulation.
• Language.
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3. File upload
• File Upload class.
• Upload Form.
• Upload controller function.
• Upload class functions.
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4. File upload class
• You can set various preferences,
restricting the type and size of the files.
• Uploading a file involves the following
general process:
An upload form is displayed.
When the form is submitted the file is
validated to make sure it is allowed to
be uploaded based on the preferences
you set.
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5. Upload form
• File uploads require a multipart form.
form_open_multipart('upload/do_upload');
<input type="file" name="userfile" size="20" />
<input type="submit" value="upload" />
form_close();
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6. Upload controller function
function do_upload(){
$config['upload_path'] = './uploads/';
$config['allowed_types'] = 'gif|jpg|png';
$this->load->library('upload', $config);
if ( ! $this->upload->do_upload())
echo $this->upload->display_errors();
else echo $this->upload->data();
}
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7. Upload class functions
• $config array to set your preferences.
• do_upload() Performs the upload based
on the preferences you've set.
• data() returns an array containing all of
the data related to the uploaded file.
• display_errors() retrieves any error
messages if the do_upload()
function returned false.
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8. Live Test
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9. Image manipulation
• Image class.
• Class initializing.
• Class functions.
• Ex: resize function.
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10. Image class
class lets you perform the following actions:
• Image Resizing.
• Thumbnail Creation.
• Image Cropping.
• Image Rotating
• Image Watermarking.
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11. class Initializing
• Image class is must initialize in your
controller using as following:
• $config : array to set preferences.
$this->load->library('image_lib‘,$config);
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12. Class functions
$this->image_lib->resize()
$this->image_lib->crop()
$this->image_lib->rotate()
$this->image_lib->watermark()
$this->image_lib->clear()
$this->image_lib->display_errors()
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13. Ex: resize function
$config['source_image']=‘./upload/mypic.jpg';
$config['new_image']='./thumbnail/newpic.jpg‘;
$config['create_thumb'] = TRUE;
$config['maintain_ratio'] = TRUE;
$config[‘hight'] = 75;
$config['width'] = 50;
$this->load->library('image_lib', $config);
$this->image_lib->resize();
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14. Live Test
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15. Language
• Language class.
• Create a language files.
• Loading and Fetching.
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16. Language class
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• Build web application with multi
language.
• The Language Class provides functions to
retrieve language files and lines of text by
language.

17. Create language files
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• Language files must be named with
_lang.php as the file extension.
• Your language files must store in
application/language directory.
• assign each line of text to $lang :
$lang['language_key'] = "message to be show";
Language files must be named with _lang.php as the file extension

18. Loading & Fetching
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• In order to fetch a line from a particular file
you must load the file first as following:
$this->lang->load('filename', 'language');
• Fetching a line of text :
$this->lang->line(‘language_key’);
Language files must be named with _lang.php as the file extension

19. Live Test
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20. THANK YOU
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Questions?