constants.php - Exit Status Code

constants.php

/*
|--------------------------------------------------------------------------
| Exit Status Codes
|--------------------------------------------------------------------------
|
| Used to indicate the conditions under which the script is exit()ing.
| While there is no universal standard for error codes, there are some
| broad conventions.  Three such conventions are mentioned below, for
| those who wish to make use of them.  The CodeIgniter defaults were
| chosen for the least overlap with these conventions, while still
| leaving room for others to be defined in future versions and user
| applications.
|
| The three main conventions used for determining exit status codes
| are as follows:
|
|    Standard C/C++ Library (stdlibc):
|       http://www.gnu.org/software/libc/manual/html_node/Exit-Status.html
|       (This link also contains other GNU-specific conventions)
|    BSD sysexits.h:
|       http://www.gsp.com/cgi-bin/man.cgi?section=3&topic=sysexits
|    Bash scripting:
|       http://tldp.org/LDP/abs/html/exitcodes.html
|
*/
defined('EXIT_SUCCESS')        OR define('EXIT_SUCCESS', 0); // no errors
defined('EXIT_ERROR')          OR define('EXIT_ERROR', 1); // generic error
defined('EXIT_CONFIG')         OR define('EXIT_CONFIG', 3); // configuration error
defined('EXIT_UNKNOWN_FILE')   OR define('EXIT_UNKNOWN_FILE', 4); // file not found
defined('EXIT_UNKNOWN_CLASS')  OR define('EXIT_UNKNOWN_CLASS', 5); // unknown class
defined('EXIT_UNKNOWN_METHOD') OR define('EXIT_UNKNOWN_METHOD', 6); // unknown class member
defined('EXIT_USER_INPUT')     OR define('EXIT_USER_INPUT', 7); // invalid user input
defined('EXIT_DATABASE')       OR define('EXIT_DATABASE', 8); // database error
defined('EXIT__AUTO_MIN')      OR define('EXIT__AUTO_MIN', 9); // lowest automatically-assigned error code
defined('EXIT__AUTO_MAX')      OR define('EXIT__AUTO_MAX', 125); // highest automatically-assigned error code