Error Handling
CodeIgniter build error reporting into your applications using the functions described below. In addition, it has an error logging class that permits error and debugging messages to be saved as text files.
show_error('message' [, int $status_code= 500 ] )
This function will display the error message supplied to it using the following error template:
application/errors/error_general.php
The optional parameter $status_code determines what HTTP status code should be sent with the error.
show_404('page' [, 'log_error'])
This function will display the 404 error message supplied to it using the following error template:
application/errors/error_404.php
The function expects the string passed to it to be the file path to the page that isn't found. Note that CodeIgniter automatically shows 404 messages if controllers are not found.
CodeIgniter automatically logs any show_404() calls. Setting the optional second parameter to FALSE will skip logging.
log_message('level', 'message')
This function lets you write messages to your log files. You must supply one of three "levels" in the first parameter, indicating what type of message it is (debug, error, info), with the message itself in the second parameter.
