codeigniter_tutorial

More documents

Recommendations

Info

9. Error 9. Handling CodeIgniter Many times, while using application, we come across errors. It is very annoying for the users if the errors are not handled properly. CodeIgniter provides an easy error handling mechanism. You would like the messages to be displayed, when the application is in developing mode rather than in production mode as the error messages can be solved easily at the developing stage. The environment of your application can be changed, by changing the line given below from index.php file. This can be set to anything but normally there are three values (development, test, production) used for this purpose. define('ENVIRONMENT', isset($_SERVER['CI_ENV']) ? $_SERVER['CI_ENV'] : 'development'); Different environment will require different levels of error reporting. By default, development mode will display errors and testing and live mode will hide them. CodeIgniter provides three functions as shown below to handle errors. 1. show_error() function displays errors in HTML format at the top of the screen. Syntax Parameters Return Type show_error($message, $status_code, $heading = 'An Error Was Encountered') $message (mixed) – Error message $status_code (int) – HTTP Response status code $heading (string) – Error page heading mixed 2. show_404() function displays error if you are trying to access a page which does not exist. Syntax show_404($page = '', $log_error = TRUE) Parameters $page (string) – URI string $log_error (bool) – Whether to log the error Return Type void 37
CodeIgniter 3. log_message() function is used to write log messages. This is useful when you want to write custom messages. Syntax Parameters Return Type log_message($level, $message, $php_error = FALSE) void $level (string) – Log level: ‘error’, ‘debug’ or ‘info’ $message (string) – Message to log $php_error (bool) – Whether we’re logging a native PHP error message Logging can be enabled in application/config/config.php file. Given below is the screenshot of config.php file, where you can set threshold value. You can find the log messages in application/log/. Make sure that this directory is writable before you enable log files. Various templates for error messages can be found in application/views/errors/cli or application/views/errors/html. 38
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 38 and 39: 8. CodeIgniter - Libraries CodeIgni
Page 40 and 41: CodeIgniter Create New Library Whil
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
Page 90 and 91: CodeIgniter //Load the view file $t
Page 92 and 93:
CodeIgniter Copy the below given co
Page 94 and 95:
CodeIgniter $this->db->query($sql,
show all

codeigniter_tutorial

You also want an ePaper? Increase the reach of your titles

Delete template?

Save as template?