codeigniter_tutorial

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8. CodeIgniter – Libraries CodeIgniter The essential part of a CodeIgniter framework is its libraries. It provides a rich set of libraries, which indirectly increase the speed of developing an application. The system library is located at system/libraries. All we need to do is to load the library that we want to use. The library can be loaded as shown below: $this->load->library('class name'); Where class name is the name of the library that we want to load. If we want to load multiple libraries, then we can simply pass an array as argument to library() function as shown below: $this->load->library(array('email', 'table')); Library Classes The library classes are located in system/libraries. Each class has various functions to simplify the developing work. Following table shows the names of the library class and its description. Library Class Benchmarking Class Caching Class Calendaring Class Shopping Cart Class Config Class Email Class Encryption Class File Uploading Class Form Validation Class FTP Class Image Manipulation Class Input Class Description Benchmarking class is always active, enabling the time difference between any two marked points to be calculated. This class will cache the pages, to quickly access the page speed. Using this class, you can dynamically create calendars. Using this class, you can add or remove item from Shopping Cart. The items are saved in session and will remain active until the user is browsing the site. Configuration preferences can be retrieved, using this class. This class is initialized automatically. This class provides email related functionality, like send or reply to email. This class provides two-way data encryption functionality. This class provides functionalities related to file uploading. You can set various preferences like type of file to be uploaded, size of the files etc. This class provides various functions to validate form. This class provides various FTP related functions like transferring files to remove server, moving, renaming or deleting files on server. Manipulation of image like resize, thumbnail creation, cropping, rotating, watermarking can be done with the help of this class. This class pre-processes the input data for security reason. 33
CodeIgniter Language Class Loader Class Migrations Class Output Class Pagination Class Template Parser Class Security Class Session Library HTML Table Trackback Class Typography Class Unit Testing Class URI Class User Agent Class XML-RPC and XML-RPC Server Classes Zip Encoding Class This class is used for internationalization. This class loads elements like View files, Drivers, Helpers, Models etc. This class provides functionalities related to database migrations. This class sends the output to browser and also, caches that webpage. This class adds pagination functionalities to web page. The Template Parser Class can perform simple text substitution for pseudo-variables contained within your view files. It can parse simple variables or variable tag pairs. This class contains security related functions like XSS Filtering, CSRF etc. This class provides functionalities to maintain session of your application. This class is used to auto-generate HTML tables from array or database results. The Trackback Class provides functions that enable you to send and receive Trackback data. The Typography Class provides methods that help to format text. This class provides functionalities to unit test your application and generate the result. The URI Class provides methods that help you retrieve information from your URI strings. If you use URI routing, you can also retrieve information about the rerouted segments. The User Agent Class provides functions that help identify information about the browser, mobile device, or robot visiting your site. In addition, you can get referrer information as well as language and supported character-set information. CodeIgniter’s XML-RPC classes permit you to send requests to another server, or set up your own XML-RPC server to receive requests. This class is used to create zip archives of your data. Creating Libraries CodeIgniter has rich set of libraries, which you can find in system/libraries folder but CodeIgniter is not just limited to system libraries, you can create your own libraries too, which can be stored in application/libraries folder. You can create libraries in three ways. Create new library Extend the native library Replace the native library 34
Page 2 and 3: CodeIgniter About the Tutorial Code
Page 4 and 5: CodeIgniter Updating a Record .....
Page 6 and 7: 1. CodeIgniter - Overview CodeIgnit
Page 8 and 9: 2. Installing CodeIgniter CodeIgnit
Page 10 and 11: CodeIgniter Directory Structure The
Page 12 and 13: CodeIgniter and classes. It is reco
Page 14 and 15: 5. CodeIgniter - Basic Concepts Cod
Page 16 and 17: CodeIgniter Visiting the third URI
Page 18 and 19: CodeIgniter The following flowchart
Page 20 and 21: CodeIgniter As shown in the above f
Page 22 and 23: CodeIgniter Reserved Routes $route[
Page 24 and 25: 6. CodeIgniter - Configuration Code
Page 26 and 27: CodeIgniter ); You can simply switc
Page 28 and 29: 7. Working with Database CodeIgnite
Page 30 and 31: CodeIgniter Finally, the update() f
Page 32 and 33: CodeIgniter function __construct(){
Page 34 and 35: CodeIgniter parent::__construct();
Page 36 and 37: CodeIgniter echo form_close(); ?>
Page 40 and 41: CodeIgniter Create New Library Whil
Page 42 and 43: 9. Error 9. Handling CodeIgniter Ma
Page 44 and 45: 10. File Uploading CodeIgniter Usin
Page 46 and 47: CodeIgniter if ( ! $this->upload->d
Page 48 and 49: 11. Sending Email CodeIgniter Sendi
Page 50 and 51: CodeIgniter Syntax Parameters Retur
Page 52 and 53: CodeIgniter $this->email->subject('
Page 54 and 55: 12. Form Validation CodeIgniter Val
Page 56 and 57: CodeIgniter } } Add the following l
Page 58 and 59: CodeIgniter less_than less_than_equ
Page 60 and 61: 13. Session Management CodeIgniter
Page 62 and 63: CodeIgniter $this->load->library('s
Page 64 and 65: CodeIgniter //redirect to home page
Page 66 and 67: 15. Tempdata CodeIgniter In some si
Page 68 and 69: CodeIgniter Click Here to add temp
Page 70 and 71: 16. Cookie Management CodeIgniter C
Page 72 and 73: CodeIgniter } public function delet
Page 74 and 75: CodeIgniter Syntax html_escape($var
Page 76 and 77: 18. Page Caching CodeIgniter Cachin
Page 78 and 79: 19. Page Redirection CodeIgniter Wh
Page 80 and 81: 20. Application Profiling CodeIgnit
Page 82 and 83: 21. Benchmarking CodeIgniter Settin
Page 84 and 85: CodeIgniter The above URL will enab
Page 86 and 87: CodeIgniter public function index()
Page 88 and 89:
23. Internationalization CodeIgnite
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CodeIgniter //Load the view file $t
Page 92 and 93:
CodeIgniter Copy the below given co
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CodeIgniter $this->db->query($sql,
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