codeigniter_tutorial

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
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